@article{ZobirOberhaensli2013,
  author    = {Zobir, Soraya Hadj and Oberh{\"a}nsli, Roland},
  title     = {The sidi Mohamed peridotites (Edough Massif, NE Algeria) - evidence for an upper mantle origin},
  series = {Journal of earth system science},
  volume    = {122},
  journal   = {Journal of earth system science},
  number    = {6},
  publisher = {Indian Academy of Science},
  address   = {Bangalore},
  issn      = {0253-4126},
  doi       = {10.1007/s12040-013-0358-z},
  pages     = {1455 -- 1465},
  year      = {2013},
  abstract  = {The Hercynian Edough massif is the easternmost crystalline massif of the Algerian coast. It consists of two tectonically superposed units composed of micaschists, gneisses, and peridotite. This study concentrates on the small and isolated Sidi Mohamed peridotite outcrop area (0.03 km(2)). The Sidi Mohamed peridotite is composed mainly of harzburgites (Mg-rich olivine and orthopyroxene as major minerals). The Ni (2051-2920 ppm), Cr (2368-5514 ppm) and MgO (similar to 28-35 wt.\%) whole-rock composition and the relative depletion in Nb make these harzburgites comparable to depleted peridotites related to a subduction zone. We suggest that the Sidi Mohamed ultramafic body was derived directly from the upper mantle and tectonically incorporated into the gneiss units of the Edough metamorphic core complex in a subduction environment.},
  language  = {en}
}
@article{ZakariadzeKarpenkoBazylevetal.1998,
  author    = {Zakariadze, G. S. and Karpenko, S. F. and Bazylev, B. A. and Adamia, S. A. and Oberh{\"a}nsli, Roland and Solov'eva, N. V. and Ljialikov, A. V.},
  title     = {Fragments of Pan-African paleooceanic complexes in the Dzirula salient of the Transcaucassian crystalline massif (petroloy, geochemistry, Sm-Nd age, problems of origin)},
  year      = {1998},
  language  = {en}
}
@article{ZakariadzeKarpenkoBazylevetal.1998,
  author    = {Zakariadze, G. S. and Karpenko, S. F. and Bazylev, B. A. and Adamia, S. A. and Oberh{\"a}nsli, Roland and Solov'eva, N. A. and Lyalikov, A. V.},
  title     = {Petrology, geochemistry, and Sm-Nd age of the pre-Late Hercynian paleooceanic complex of the Dzirula salient, Transcaucasian Massif},
  year      = {1998},
  language  = {en}
}
@article{WolffBoenischTrackSchenketal.1997,
  author    = {Wolff-Boenisch, D. and Track, T. and Schenk, D. and Oberh{\"a}nsli, Roland},
  title     = {Sorptionsverhalten von 2,4,6-Trinitrotoluol und 1,3-Dinitrobenzol an unterschidlichen Bodenmodellsubstanzen},
  year      = {1997},
  language  = {de}
}
@article{WilhelmAltenbergerOberhaensli2001,
  author    = {Wilhelm, Stefan and Altenberger, Uwe and Oberh{\"a}nsli, Roland},
  title     = {Intrusive marbles in the Ivrea Zone (Italy) : evidence for melting of metacarbonates},
  year      = {2001},
  language  = {en}
}
@article{WichuraBousquetOberhaenslietal.2010,
  author    = {Wichura, Henry and Bousquet, Romain and Oberh{\"a}nsli, Roland and Strecker, Manfred and Trauth, Martin H.},
  title     = {Evidence for middleUocene uplift of the East African Plateau},
  issn      = {0091-7613},
  doi       = {10.1130/G31022.1},
  year      = {2010},
  abstract  = {Cenozoic uplift of the East African Plateau has been associated with fundamental climatic and environmental changes in East Africa and adjacent regions. While this influence is widely accepted, the timing and the magnitude of plateau uplift have remained unclear. This uncertainty stems from the lack of datable, geomorphically meaningful reference horizons that could record surface uplift. Here, we document the existence of significant relief along the East African Plateau prior to rifting, as inferred from modeling the emplacement history of one of the longest terrestrial lava flows, the similar to 300-km-long Yatta phonolite flow in Kenya. This 13.5 Ma lava flow originated on the present-day eastern Kenya Rift flank, and utilized a riverbed that once routed runoff from the eastern rim of the plateau. Combining an empirical viscosity model with subsequent cooling and using the Yatta lava flow geometry and underlying paleotopography (slope angle), we found that the prerift slope was at least 0.2 degrees, suggesting that the lava flow originated at a minimum elevation of 1400 m. Hence, high paleotopography in the Kenya Rift region must have existed by at least 13.5 Ma. We infer from this that middle Miocene uplift occurred, which coincides with the two-step expansion of grasslands, as well as important radiation and speciation events in tropical Africa.},
  language  = {en}
}
@article{WenzelOberhaensliMezger2000,
  author    = {Wenzel, T. and Oberh{\"a}nsli, Roland and Mezger, Klaus},
  title     = {K-rich plutonic rocks and lamprophyres from the Meissen Massif (northern Bohemian Massif) : Geochemical evidence for variably enriched lithospheric mantle sources},
  year      = {2000},
  language  = {en}
}
@article{WenzelMertzOberhaenslietal.1997,
  author    = {Wenzel, T. and Mertz, D. and Oberh{\"a}nsli, Roland and Becker, Thomas and Penne, P.},
  title     = {Age, geodynamic setting, and mantle enrichment processes of a K-rich intrusion from the Meissen massif (northern Bohemian massif) and implications for related occurrences from the mid-European Hecynian},
  year      = {1997},
  language  = {en}
}
@article{WeberAbuAyyashAbueladasetal.2004,
  author    = {Weber, Michael H. and Abu-Ayyash, Khalil and Abueladas, Abdel-Rahman and Agnon, Amotz and Al-Amoush, H. and Babeyko, Andrey and Bartov, Yosef and Baumann, M. and Ben-Avraham, Zvi and Bock, G{\"u}nter and Bribach, Jens and El-Kelani, R. and Forster, A. and F{\"o}rster, Hans-J{\"u}rgen and Frieslander, U. and Garfunkel, Zvi and Grunewald, Steffen and Gotze, Hans-J{\"u}rgen and Haak, Volker and Haberland, Christian and Hassouneh, Mohammed and Helwig, S. and Hofstetter, Alfons and Jackel, K. H. and Kesten, Dagmar and Kind, Rainer and Maercklin, Nils and Mechie, James and Mohsen, Amjad and Neubauer, F. M. and Oberh{\"a}nsli, Roland and Qabbani, I. and Ritter, O. and Rumpker, G. and Rybakov, M. and Ryberg, Trond and Scherbaum, Frank and Schmidt, J. and Schulze, A. and Sobolev, Stephan Vladimir and Stiller, M. and Th,},
  title     = {The crustal structure of the Dead Sea Transform},
  year      = {2004},
  abstract  = {To address one of the central questions of plate tectonics-How do large transform systems work and what are their typical features?-seismic investigations across the Dead Sea Transform (DST), the boundary between the African and Arabian plates in the Middle East, were conducted for the first time. A major component of these investigations was a combined reflection/ refraction survey across the territories of Palestine, Israel and Jordan. The main results of this study are: (1) The seismic basement is offset by 3-5 km under the DST, (2) The DST cuts through the entire crust, broadening in the lower crust, (3) Strong lower crustal reflectors are imaged only on one side of the DST, (4) The seismic velocity sections show a steady increase in the depth of the crust-mantle transition (Moho) from 26 km at the Mediterranean to 39 km under the Jordan highlands, with only a small but visible, asymmetric topography of the Moho under the DST. These observations can be linked to the left-lateral movement of 105 km of the two plates in the last 17 Myr, accompanied by strong deformation within a narrow zone cutting through the entire crust. Comparing the DST and the San Andreas Fault (SAF) system, a strong asymmetry in subhorizontal lower crustal reflectors and a deep reaching deformation zone both occur around the DST and the SAF. The fact that such lower crustal reflectors and deep deformation zones are observed in such different transform systems suggests that these structures are possibly fundamental features of large transform plate boundaries},
  language  = {en}
}
@article{WawrzenitzRomerOberhaenslietal.2006,
  author    = {Wawrzenitz, Nicole and Romer, Rolf L. and Oberh{\"a}nsli, Roland and Dong, Shuwen},
  title     = {Dating of subduction and differential exhumation of UHP rocks from the Central Dabie Complex (E-China) : constraints from microfabrics, Rb-Sr and U-Pb isotope systems},
  doi       = {10.1016/j.lithos.2005.12.001},
  year      = {2006},
  abstract  = {The correlation of deformation fabrics and metamorphic reactions with geochronologic data of UHP metamorphic rocks demonstrate that the multistage subduction and exhumation history of the Central Dabie Complex requires rapid subduction and rapid initial exhumation. Moreover, these data show that volume diffusion is not the major resetting mechanism of radiogenic isotope systems. Thus, our age data do not simply reflect a thermal/cooling history. In the investigated section, the maximum age for UHP is given by the 244 +/- 3 Ma (2 sigma) U-Pb age of a pre-UHP titanite phenocryst that survived UHP metamorphism and subsequent tectonometamorphic events. A minimum age for UHP is set by the 238 +/- 1 Ma (2 sigma) U-238-Pb-206 mineral isochron age of titanite and cogenetic epidote. These minerals formed from local partial melts during ascent and their age suggests fast exhumation and emplacement in the middle crust. In the period of ca. 238-218 Ma, the UHP terrain records HT metamorphism, local partial melting, and extensive pervasive strain below the eclogite (jd+grt) stability field. Exhumation was polyphase with a first phase of fast exhumation, succeeded by episodes of HT metamorphism and concomitant deformation at deep/mid crustal level between 238 and 218 Ma. Slow exhumation related to the final emplacement of tectonic units along greenschist facies shear zones did not cease before ca. 209-204 Ma. The resetting and homogenization of radiogenic isotope systems were aided by dissolution precipitation creep, which was the dominant deformation mechanism in quartz-feldspar rocks, in combination with fluid influx. (c) 2005 Elsevier B.V. All rights reserved},
  language  = {en}
}
@article{ToksoyKoeksalOberhaensliGoencueoglu2009,
  author    = {Toksoy-Koeksal, Fatma and Oberh{\"a}nsli, Roland and Goencueoglu, M. Cemal},
  title     = {Hydrous aluminosilicate metasomatism in an intra-oceanic subduction zone : implications from the Kurancali (Turkey) ultramafic-mafic cumulates within the Alpine Neotethys Ocean},
  issn      = {0930-0708},
  doi       = {10.1007/s00710-009-0044-7},
  year      = {2009},
  abstract  = {The Kurancali ultramafic-mafic cumulate body, an allochthonous ophiolitic sliver in central Anatolia, is characterized by the presence of abundant hydrous phases (phlogopite, pargasite) besides augitic diopside, plagioclase, and accessory amounts of rutile, sphene, apatite, zircon, and calcite. Based on modes of the essential minerals, the olivine-orthopyroxene-free cumulates are grouped as clinopyroxenite, hydrous clinopyroxenite, phlogopitite, hornblendite, layered gabbro, and diorite. Petrographical, mineralogical and geochemical features of the rocks infer crystallization from a hydrous magma having high-K calcalkaline affinity with slightly alkaline character, and point to metasomatised mantle as the magma source. Our evidence implies that the metasomatising component, which modified the composition of the mantle wedge source rock in an intraoceanic subduction zone, was a H2O, alkali and carbonate-rich aluminosilicate fluid and/or melt, probably derived from a subducted slab. We suggest that the metasomatic agents in the subarc mantle led to the generation of a hydrous magma, which produced the Kurancali cumulates in an island-arc basement in a supra-subduction-zone setting during the closure of the Izmir-Ankara-Erzincan branch of the Alpine Neotethys Ocean.},
  language  = {en}
}
@article{SheikholeslamiOberhaensliGhassemi2019,
  author    = {Sheikholeslami, Mohammad Reza and Oberh{\"a}nsli, Roland and Ghassemi, Mohammad R.},
  title     = {Transpression tectonics in the eastern Binalud Mountains, northeast Iran; Insight from finite strain analysis, vorticity and Ar-40/Ar-39 dating},
  series = {Journal of Asian earth sciences},
  volume    = {179},
  journal   = {Journal of Asian earth sciences},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {1367-9120},
  doi       = {10.1016/j.jseaes.2019.04.014},
  pages     = {219 -- 237},
  year      = {2019},
  abstract  = {Different tectonic episodes from Late Triassic to recent times in the eastern Binalud Mountains have resulted from convergence and transpression between the Turan and Central Iran plates. Heterogeneous deformation and variable portions of pure and simple shear, demonstrated by finite strain and vorticity analysis in the Mashhad metamorphic rocks, indicate strain partitioning during the first tectonic episode. Modern strain partitioning is characterized by reverse and strike-slip faulting along the Neyshabur fault system and Shandiz fault zone in the southern and northern flanks of the eastern Binalud, respectively. Time-transgressive regional deformation migrated from the hinterland of the belt into the foreland basin, from northeast to the southwest of the mountains. Different generations of deformation resulted in obliteration of the subduction-related accretionary wedge, and growth of an orogenic wedge resulted from collision between the Central Iran and Turan plates.},
  language  = {en}
}
@article{SchmidAltenbergerOberhaensli1998,
  author    = {Schmid, Robert and Altenberger, Uwe and Oberh{\"a}nsli, Roland},
  title     = {Polyphase tectono-metamorphic evolution of the northwestern Lindas Nappe on Holsnoy, Bergen Arcs, Caledonides, SW-Norway},
  year      = {1998},
  language  = {en}
}
@article{SchefflerOberhaensliPourteauetal.2016,
  author    = {Scheffler, Franziska and Oberh{\"a}nsli, Roland and Pourteau, Amaury and Immenhauser, A. and Candan, O.},
  title     = {Sedimentologic to metamorphic processes recorded in the high-pressure/low-temperature Mesozoic Rosetta Marble of Anatolia},
  series = {International journal of earth sciences},
  volume    = {105},
  journal   = {International journal of earth sciences},
  publisher = {Springer},
  address   = {New York},
  issn      = {1437-3254},
  doi       = {10.1007/s00531-015-1214-y},
  pages     = {225 -- 246},
  year      = {2016},
  abstract  = {Anatolia's high-pressure metamorphic belts are characterized in part by a Neotethyan stratigraphic succession that includes a mid-Cretaceous hemi-pelagic marble sequence. This unit contains, towards its stratigraphic top, dm-to-m-long radiating calcitic rods forming rosette-like textures. Here, we refer to these features as "Rosetta Marble". The remarkable textural similarity of non-metamorphic selenite crystals and radiating calcite rods in the Rosetta Marble strongly suggests that these textures represent pseudomorphs after selenites. Metamorphosed hemi-pelagic limestones, dominated by Rosetta selenite pseudomorphs, are alternating with siliceous meta-sediments containing relictic radiolaria tests. This stratigraphic pattern is indicative of transient phases characterized by evaporites precipitated from basinal brines alternating with non-evaporative hemi-pelagic deposition from normal-marine seawater. The regional distribution of Rosetta Marble exposures over 600 km is indicative of basin-scale evaporitic intervals. High-pressure, low-temperature metamorphism of these rocks is witnessed by Sr-rich (up to 3500 ppm), fibrous calcite pseudomorphs after aragonite and isolated aragonite inclusions in quartz. Peak metamorphic conditions of 1.2 GPa and 300-350 °C are attested by high-Si white mica thermobarometry. The Rosetta Marble case example examines the potential to unravel the complete history from deposition to diagenesis and metamorphism of meta-sedimentary rocks.},
  language  = {en}
}
@unpublished{SchefflerOberhaensliPourteauetal.2014,
  author    = {Scheffler, Franziska and Oberh{\"a}nsli, Roland and Pourteau, Amaury and Candan, Osman and Di Lucia, Matteo},
  title     = {The rosetta marbles from feslegen, A-ren unit, SW Anatolia},
  series = {International journal of earth sciences},
  volume    = {103},
  journal   = {International journal of earth sciences},
  number    = {2},
  publisher = {Springer},
  address   = {New York},
  issn      = {1437-3254},
  doi       = {10.1007/s00531-013-0936-y},
  pages     = {485 -- 486},
  year      = {2014},
  language  = {en}
}
@article{SchefflerImmenhauserPourteauetal.2019,
  author    = {Scheffler, Franziska and Immenhauser, Adrian and Pourteau, Amaury and Natalicchio, Marcello and Candan, Osman and Oberh{\"a}nsli, Roland},
  title     = {A lost Tethyan evaporitic basin},
  series = {Sedimentology : the journal of the International Association of Sedimentologists},
  volume    = {66},
  journal   = {Sedimentology : the journal of the International Association of Sedimentologists},
  number    = {7},
  publisher = {Wiley},
  address   = {Hoboken},
  issn      = {0037-0746},
  doi       = {10.1111/sed.12606},
  pages     = {2627 -- 2660},
  year      = {2019},
  abstract  = {Ancient evaporite deposits are geological archives of depositional environments characterized by a long-term negative precipitation balance and bear evidence for global ocean element mass balance calculations. Here, Cretaceous selenite pseudomorphs from western Anatolia ('Rosetta Marble') — characterized by their exceptional morphological preservation — and their 'marine' geochemical signatures are described and interpreted in a process-oriented context. These rocks recorded Late Cretaceous high-pressure/low-temperature, subduction-related metamorphism with peak conditions of 1·0 to 1·2 GPa and 300 to 400°C. Metre-scale, rock-forming radiating rods, now present as fibrous calcite marble, clearly point to selenitic gypsum as the precursor mineral. Stratigraphic successions are recorded along a reconstructed proximal to distal transect. The cyclical alternation of selenite beds and radiolarian ribbon-bedded cherts in the distal portions are interpreted as a two type of seawater system. During arid intervals, shallow marine brines cascaded downward into basinal settings and induced precipitation. During more humid times, upwelling-induced radiolarian blooms caused the deposition of radiolarite facies. Interestingly, there is no comparable depositional setting known from the Cenozoic world. Meta-selenite geochemical data (δ13C, δ18O and 87Sr/86Sr) plot within the range of reconstructed middle Cretaceous seawater signatures. Possible sources for the 13C-enriched (mean 2·2 per mille) values include methanogenesis, gas hydrates and cold seep fluid exhalation. Spatially resolved component-specific analysis of a rock slab displays isotopic variances between meta-selenite crystals (mean δ13C 2·2 per mille) and host matrix (mean δ13C 1·3 per mille). The Cretaceous evaporite-pseudomorphs of Anatolia represent a basin wide event coeval with the Aptian evaporites of the Proto-Atlantic and the pseudomorphs share many attributes, including lateral distribution of 600 km and stratigraphic thickness of 1·5 to 2·0 km, with the evaporites formed during the younger Messinian salinity crisis. The Rosetta Marble of Anatolia may represent the best-preserved selenite pseudomorphs worldwide and have a clear potential to act as a template for the study of meta-selenite in deep time.},
  language  = {en}
}
@article{SakiMoazzenOberhaensli2012,
  author    = {Saki, Adel and Moazzen, Mohssen and Oberh{\"a}nsli, Roland},
  title     = {Mineral chemistry and thermobarometry of the staurolite-chloritoid schists from Poshtuk, NW Iran},
  series = {Geological magazine},
  volume    = {149},
  journal   = {Geological magazine},
  number    = {6},
  publisher = {Cambridge Univ. Press},
  address   = {New York},
  issn      = {0016-7568},
  doi       = {10.1017/S0016756812000209},
  pages     = {1077 -- 1088},
  year      = {2012},
  abstract  = {The Poshtuk metapelitic rocks in northwestern Iran underwent two main phases of regional and contact metamorphism. Microstructures, textural features and field relations indicate that these rocks underwent a polymetamorphic history. The dominant metamorphic assemblage of the metapelites is garnet, staurolite, chloritoid, chlorite, muscovite and quartz, which grew mainly syntectonically during the later contact metamorphic event. Peak metamorphic conditions of this event took place at 580 degrees C and similar to 3-4 kbar, indicating that this event occurred under high-temperature and low-pressure conditions (HT/LP metamorphism), which reflects the high heat flow in this part of the crust. This event is mainly controlled by advective heat input through magmatic intrusions into all levels of the crust. These extensive Eocene metamorphic and magmatic activities can be associated with the early Alpine Orogeny, which resulted in this area from the convergence between the Arabian and Eurasian plates, and the Cenozoic closure of the Tethys oceanic tract(s).},
  language  = {en}
}
@article{SakiMiriOberhaensli2020,
  author    = {Saki, Adel and Miri, Mirmohammad and Oberh{\"a}nsli, Roland},
  title     = {High temperature - low pressure metamorphism during subduction of Neo-Tethys beneath the Iranian plate},
  series = {Mineralogy and petrology},
  volume    = {114},
  journal   = {Mineralogy and petrology},
  number    = {6},
  publisher = {Springer},
  address   = {Wien [u.a.]},
  issn      = {0930-0708},
  doi       = {10.1007/s00710-020-00721-z},
  pages     = {539 -- 557},
  year      = {2020},
  abstract  = {Subduction of Neo-Tethys oceanic lithosphere beneath the Iranian plate during the Mesozoic formed several igneous bodies of ultramafic to intermediate and felsic composition. Intrusion of these magmas into a regional metamorphic sequence (the Sanandaj-Sirjan Zone) caused partial melting and formation of migmatites with meta-pelitic protoliths. The Alvand complex (west Iran) is a unique area comprising migmatites of both mafic and pelitic protoliths. In this area, the gabbroic rocks contain veins of leucosome at their contact with pyroxenite and olivine gabbro. These leucosomes are geochemically and mineralogically different from leucosomes of the meta-pelitic migmatites and clearly show properties of I-type granites. Microscopic observations and whole rock compositions of the mafic migmatite leucosomes show that migmatization occurred through partial melting of biotite, hornblende and plagioclase. Thermobarometric calculations indicate 800 degrees C and 3.7 kbar for partial melting, although phase diagram modeling demonstrates that the presence of water could decrease the solidus temperature by about 40 degrees C. Our results suggest an asthenospheric magma upwelling as the source of heat for partial melting of the gabbroic rock during subduction of Neo-Tethys oceanic crust under the western edge of the Iranian plate. The present study also reveals relationships between migmatization and formation of S- and I -type granites in the area.},
  language  = {en}
}
@article{SakiMiriOberhaensli2021,
  author    = {Saki, Adel and Miri, Mirmohammad and Oberh{\"a}nsli, Roland},
  title     = {Pseudosection modelling of the Precambrian meta-pelites from the Poshtuk area, NW Iran},
  series = {Periodico di mineralogia : an international journal of mineralogy, crystallography, geochemistry, ore deposits, petrology, volcanology and applied topics on environment, archaeometry and cultural heritage / Dipartimento di Scienze della Terra, Universit{\`a} degli Studi di Roma la Sapienza},
  volume    = {90},
  journal   = {Periodico di mineralogia : an international journal of mineralogy, crystallography, geochemistry, ore deposits, petrology, volcanology and applied topics on environment, archaeometry and cultural heritage / Dipartimento di Scienze della Terra, Universit{\`a} degli Studi di Roma la Sapienza},
  number    = {3},
  publisher = {Bardi},
  address   = {Roma},
  issn      = {0369-8963},
  doi       = {10.13133/2239-1002/16632},
  pages     = {325 -- 340},
  year      = {2021},
  abstract  = {Precambrian meta-pelites of the Poshtuk area in northwest Iran contain the prograde mineral assemblage staurolite-garnet-chloritoid-muscovite-biotite that was replaced by the assemblage garnet-staurolite-chlorite-muscovite-biotite at peak metamorphic condition. Whole-rock compositions reveal that high Fe, Al and Mn contents of their protolith rendered them prone to form these assemblages. Pseudosections calculated in KFMASH, MnKFMASH, and MnNCKFMASHO systems were used to investigate the P-T evolution of the samples. They clearly show the significant effect of MnO on the stability of the chloritoid-bearing assemblages and the formation of garnet through consumption of chlorite and chloritoid. The pseudosection in a T- aH(2)O diagram shows that the studied assemblage could be stable only at a(H2O)>0.8. X-Mg isopleths for garnet and biotite point to peak P-T conditions of about 3.75 kbar and 575 degrees C. Chloritoid stability is overstepped with such conditions. This can be attributed to thermal perturbation due to plutonism. It is concluded, metamorphism was primarily controlled by advective heat from magmatic intrusions in the Poshtuk area. The Precambrian basement complexes were extensively overprinted by the Pan-African Orogeny as well as younger magmatic and metamorphic activities associated to Alpine Orogeny during convergence of Arabian and Eurasian plate.},
  language  = {en}
}
@article{SakiMoazzenOberhaensli2011,
  author    = {Saki, A. and Moazzen, Mohssen and Oberh{\"a}nsli, Roland},
  title     = {P-T evolution of the precambrian metamorphic complex, NW Iran a study of metapelitic rocks},
  series = {Geological journal},
  volume    = {46},
  journal   = {Geological journal},
  number    = {1},
  publisher = {Wiley-Blackwell},
  address   = {Malden},
  issn      = {0072-1050},
  doi       = {10.1002/gj.1236},
  pages     = {10 -- 25},
  year      = {2011},
  abstract  = {The Mahneshan Metamorphic Complex (MMC) is one of the Precambrian terrains exposed in the northwest of Iran. The MMC underwent two main phases of deformation (D-1 and D-2) and at least two metamorphic events (M-1 and M-2). Critical metamorphic mineral assemblages in the metapelitic rocks testify to regional metamorphism under amphibolite-facies conditions. The dominant metamorphic mineral assemblage in metapelitic rocks (M-1) is muscovite, biotite I, Garnet I, staurolite, Andalusite I and sillimanite. Peak metamorphism took place at 600-620 degrees C and similar to 7 kbar, corresponding to a depth of ca. 24 km. This was followed by decompression during exhumation of the crustal rocks up to the surface. The decrease of temperature and pressure during exhumation produced retrograde metamorphic assemblages (M-2). Secondary phases such as garnet II biotite It. Andalusite II constrain the temperature and pressure of M, retrograde metamorphism to 520-560 degrees C and 2.5-3.5 kbar, respectively. The geothermal gradient obtained for the peak of metamorphism is 33 degrees C km(-1), which indicates that peak metamorphism was of Barrovian type and occurred under medium-pressure conditions. The MMC followed a 'clockwise' P T path during metamorphism, consistent with thermal relaxation following tectonic thickening. The bulk chemistry of the MMC metapelites shows that their protoliths were deposited at an active continental margin. Together with the presence of palaeo-suture zones and ophiolitic rocks around the high-grade metamorphic rocks of the MMC, these features suggest that the Iranian Precambrian basement formed by an island-arc type cratonization.},
  language  = {en}
}
@article{SaddiqiPoupeauMichardetal.1995,
  author    = {Saddiqi, O. and Poupeau, G. and Michard, Andre and Groffe, B. and Oberh{\"a}nsli, Roland},
  title     = {Exhumation des roches metamorphiques HP-BT d'Oman : datation par traces de fission sur zircons},
  year      = {1995},
  language  = {fr}
}
@article{RimmeleParraGoffeetal.2005,
  author    = {Rimmele, Gaetan and Parra, T. and Goffe, B. and Oberh{\"a}nsli, Roland and Jolivet, L. and Candan, O.},
  title     = {Exhumation paths of high-pressure-low-temperature metamorphic rocks from the Lycian Nappes and the Menderes Massif (SW Turkey) : a multi-equilibrium approach},
  issn      = {0022-3530},
  year      = {2005},
  abstract  = {The Menderes Massif and the overlying Lycian Nappes occupy an extensive area of SW Turkey where high-pressure- low-temperature metamorphic rocks occur. Precise retrograde P-T paths reflecting the tectonic mechanisms responsible for the exhumation of these high-pressure-low-temperature rocks can be constrained with multi-equilibrium P-T estimates relying on local equilibria. Whereas a simple isothermal decompression is documented for the exhumation of high-pressure parageneses from the southern Menderes Massif, various P-T paths are observed in the overlying Karaova Formation of the Lycian Nappes. In the uppermost levels of this unit, far from the contact with the Menderes Massif, all P-T estimates depict cooling decompression paths. These high-pressure cooling paths are associated with top-to-the-NNE movements related to the Akcakaya shear zone, located at the top of the Karaova Formation. This zone of strain localization is a local intra-nappe contact that was active in the early stages of exhumation of the high-pressure rocks. In contrast, at the base of the Karaova Formation, along the contact with the Menderes Massif, P-T calculations show decompressional heating exhumation paths. These paths are associated with severe deformation characterized by top-to-the-east shearing related to a major shear zone (the Gerit shear zone) that reflects late exhumation of high-pressure parageneses under warmer conditions},
  language  = {en}
}
@article{RettingerSchorscherOberhaensli1996,
  author    = {Rettinger, Rolf and Schorscher, H. D. and Oberh{\"a}nsli, Roland},
  title     = {Geothermobarometric correlation of geothermobarometers and petrogenetic modelling in Ne-Quadrilatero Ferrifero, Minas Gerais, Brazil},
  year      = {1996},
  language  = {en}
}
@misc{PourteauSudoCandanetal.2013,
  author    = {Pourteau, Amaury and Sudo, Masafumi and Candan, Osman and Lanari, P. and Vidal, O. and Oberh{\"a}nsli, Roland},
  title     = {Neotethys closure history of Anatolia - insights from Ar-40-Ar-39 geochronology and P-T estimation in high-pressure metasedimentary rocks},
  series = {Journal of metamorphic geology},
  volume    = {31},
  journal   = {Journal of metamorphic geology},
  number    = {6},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {0263-4929},
  doi       = {10.1111/jmg.12034},
  pages     = {585 -- 606},
  year      = {2013},
  abstract  = {The multiple high-pressure (HP), low-temperature (LT) metamorphic units of Western and Central Anatolia offer a great opportunity to investigate the subduction-and continental accretion-related evolution of the eastern limb of the long-lived Aegean subduction system. Recent reports of the HP-LT index mineral Fe-Mg-carpholite in three metasedimentary units of the Gondwana-derived Anatolide-Tauride continental block (namely the Afyon Zone, the Oren Unit and the southern Menderes Massif) suggest a more complicated scenario than the single-continental accretion model generally put forward in previous studies. This study presents the first isotopic dates (white mica Ar-40-Ar-39 geochronology), and where possible are combined with P-T estimates (chlorite thermometry, phengite barometry, multi-equilibrium thermobarometry), on carpholite-bearing rocks from these three HP-LT metasedimentary units. It is shown that, in the Afyon Zone, carpholite-bearing assemblages were retrogressed through greenschist-facies conditions at c. 67-62 Ma. Early retrograde stages in the Oren Unit are dated to 63-59 Ma. In the Kurudere-Nebiler Unit (HP Mesozoic cover of the southern Menderes Massif), HP retrograde stages are dated to c. 45 Ma, and post-collisional cooling to c. 26 Ma. These new results support that the Oren Unit represents the westernmost continuation of the Afyon Zone, whereas the Kurudere-Nebiler Unit correlates with the Cycladic Blueschist Unit of the Aegean Domain. In Western Anatolia, three successive HP-LT metamorphic belts thus formed: the northernmost Tavsanli Zone (c. 88-82 Ma), the Oren-Afyon Zone (between 70 and 65 Ma), and the Kurudere-Nebiler Unit (c. 52-45 Ma). The southward younging trend of the HP-LT metamorphism from the upper and internal to the deeper and more external structural units, as in the Aegean Domain, points to the persistence of subduction in Western Anatolia between 93-90 and c. 35 Ma. After the accretion of the Menderes-Tauride terrane, in Eocene times, subduction stopped, leading to continental collision and associated Barrovian-type metamorphism. Because, by contrast, the Aegean subduction did remain active due to slab roll-back and trench migration, the eastern limb (below Southwestern Anatolia) of the Hellenic slab was dramatically curved and consequently teared. It therefore is suggested that the possibility for subduction to continue after the accretion of buoyant (e.g. continental) terranes probably depends much on palaeogeography.},
  language  = {en}
}
@misc{PourteauOberhaensliCandanetal.2016,
  author    = {Pourteau, Amaury and Oberh{\"a}nsli, Roland and Candan, Osman and Barrier, Eric and Vrielynck, Bruno},
  title     = {Neotethyan closure history of western Anatolia: a geodynamic discussion},
  series = {International journal of earth sciences},
  volume    = {105},
  journal   = {International journal of earth sciences},
  publisher = {Springer},
  address   = {New York},
  issn      = {1437-3254},
  doi       = {10.1007/s00531-015-1226-7},
  pages     = {203 -- 224},
  year      = {2016},
  abstract  = {This paper addresses the lithosphere-scale subduction-collision history of the eastern termination of the Aegean retreating subduction system, i.e. western Anatolia. Although there is some general consensus on the protracted subduction evolution of the Aegean since the early Cenozoic at least, correlation with western Anatolia has been widely debated for more than several decades. In western Anatolia, three main tectonic configurations have been envisaged in the past years to reconstruct slab dynamics during the closure of the Neotethyan oceanic realm since the Late Cretaceous. Some authors have suggested an Aegean-type scenario, with the continuous subduction of a single lithospheric slab, punctuated by episodic slab roll-back and trench retreat, whereas others assumed a discontinuous subduction history marked by intermittent slab break-off during either the Campanian (ca. 75 Ma) or the Early Eocene (ca. 55-50 Ma). The third view implies three partly contemporaneous subduction zones. Our review of these models points to key debated aspects that can be re-evaluated in the light of multidisciplinary constraints from the literature. Our discussion leads us to address the timing of subduction initiation, the existence of hypothetical ocean basins, the number of intervening subduction zones between the Taurides and the Pontides, the palaeogeographic origin of tectonic units and the possibility for slab break-off during either the Campanian or the Early Eocene. Thence, we put forward a favoured tectonic scenario featuring two successive phases of subduction of a single lithospheric slab and episodic accretion of two continental domains separated by a continental trough, representing the eastern end of the Cycladic Ocean of the Aegean. The lack of univocal evidence for slab break-off in western Anatolia and southward-younging HP/LT metamorphism in continental tectonic units (from similar to 85, 70 to 50 Ma) in the Late Cretaceous-Palaeogene period suggests continuous subduction since similar to 110 Ma, marked by roll-back episodes in the Palaeocene and the Oligo-Miocene, and slab tearing below western Anatolia during the Miocene.},
  language  = {en}
}
@article{PourteauBousquetVidaletal.2014,
  author    = {Pourteau, Amaury and Bousquet, Romain and Vidal, Olivier and Plunder, Alexis and Duesterhoeft, Erik and Candan, Osman and Oberh{\"a}nsli, Roland},
  title     = {Multistage growth of Fe-Mg-carpholite and Fe-Mg-chloritoid, from field evidence to thermodynamic modelling},
  series = {Contributions to mineralogy and petrology},
  volume    = {168},
  journal   = {Contributions to mineralogy and petrology},
  number    = {6},
  publisher = {Springer},
  address   = {New York},
  issn      = {0010-7999},
  doi       = {10.1007/s00410-014-1090-7},
  pages     = {25},
  year      = {2014},
  abstract  = {We provide new insights into the prograde evolution of HP/LT metasedimentary rocks on the basis of detailed petrologic examination, element-partitioning analysis, and thermodynamic modelling of well-preserved Fe-Mg-carpholite- and Fe-Mg-chloritoid-bearing rocks from the Afyon Zone (Anatolia). We document continuous and discontinuous compositional (ferromagnesian substitution) zoning of carpholite (overall X-Mg = 0.27-0.73) and chloritoid (overall X-Mg = 0.07-0.30), as well as clear equilibrium and disequilibrium (i.e., reaction-related) textures involving carpholite and chloritoid, which consistently account for the consistent enrichment in Mg of both minerals through time, and the progressive replacement of carpholite by chloritoid. Mg/Fe distribution coefficients calculated between carpholite and chloritoid vary widely within samples (2.2-20.0). Among this range, only values of 7-11 correlate with equilibrium textures, in agreement with data from the literature. Equilibrium phase diagrams for metapelitic compositions are calculated using a newly modified thermodynamic dataset, including most recent data for carpholite, chloritoid, chlorite, and white mica, as well as further refinements for Fe-carpholite, and both chloritoid end-members, as required to reproduce accurately petrologic observations (phase relations, experimental constraints, Mg/Fe partitioning). Modelling reveals that Mg/Fe partitioning between carpholite and chloritoid is greatly sensitive to temperature and calls for a future evaluation of possible use as a thermometer. In addition, calculations show significant effective bulk composition changes during prograde metamorphism due to the fractionation of chloritoid formed at the expense of carpholite. We retrieve P-T conditions for several carpholite and chloritoid growth stages (1) during prograde stages using unfractionated, bulk-rock XRF analyses, and (2) at peak conditions using compositions fractionated for chloritoid. The P-T paths reconstructed for the Kutahya and Afyon areas shed light on contrasting temperature conditions for these areas during prograde and peak stages.},
  language  = {en}
}
@article{PoupeauSaddiqiMichardetal.1998,
  author    = {Poupeau, G. and Saddiqi, O. and Michard, Andre and Goffe, B. and Oberh{\"a}nsli, Roland},
  title     = {Late thermal evolution of the oman mountains subophiolitic windows : apatite fission-track thermochronology},
  issn      = {0091-7613},
  year      = {1998},
  language  = {en}
}
@article{OmraniMoazzenOberhaenslietal.2017,
  author    = {Omrani, Hadi and Moazzen, Mohssen and Oberh{\"a}nsli, Roland and Moslempour, Mohammad Elyas},
  title     = {Iranshahr blueschist: subduction of the inner Makran oceanic crust},
  series = {Journal of metamorphic geology},
  volume    = {35},
  journal   = {Journal of metamorphic geology},
  publisher = {Wiley},
  address   = {Hoboken},
  issn      = {0263-4929},
  doi       = {10.1111/jmg.12236},
  pages     = {373 -- 392},
  year      = {2017},
  abstract  = {The Makran accretionary prism in SE Iran and SW Pakistan is one of the most extensive subduction accretions on Earth. It is characterized by intense folding, thrust faulting and dislocation of the Cenozoic units that consist of sedimentary, igneous and metamorphic rocks. Rock units forming the northern Makran ophiolites are amalgamated as a melange. Metamorphic rocks, including greenschist, amphibolite and blueschist, resulted from metamorphism of mafic rocks and serpentinites. In spite of the geodynamic significance of blueschist in this area, it has been rarely studied. Peak metamorphic phases of the northern Makran mafic blueschist in the Iranshahr area are glaucophane, phengite, quartz +/- omphacite+epidote. Post peak minerals are chlorite, albite and calcic amphibole. Blueschist facies metasedimentary rocks contain garnet, phengite, albite and epidote in the matrix and as inclusions in glaucophane. The calculated P-T pseudosection for a representative metabasic glaucophane schist yields peak pressure and temperature of 11.5-15kbar at 400-510 degrees C. These rocks experienced retrograde metamorphism from blueschist to greenschist facies (350-450 degrees C and 7-8kbar) during exhumation. A back arc basin was formed due to northward subduction of Neotethys under Eurasia (Lut block). Exhumation of the high-pressure metamorphic rocks in northern Makran occurred contemporarily with subduction. Several reverse faults played an important role in exhumation of the ophiolitic and HP-LT rocks. The presence of serpentinite shows the possible role of a serpentinite diapir for exhumation of the blueschist. A tectonic model is proposed here for metamorphism and exhumation of oceanic crust and accretionary sedimentary rocks of the Makran area. Vast accretion of subducted materials caused southward migration of the shore.},
  language  = {en}
}
@article{OmraniMoazzenOberhaenslietal.2013,
  author    = {Omrani, Hadi and Moazzen, Mohssen and Oberh{\"a}nsli, Roland and Altenberger, Uwe and Lange, Manuela},
  title     = {The Sabzevar blueschists of the North-Central Iranian micro-continent as remnants of the Neotethys-related oceanic crust subduction},
  series = {International journal of earth sciences},
  volume    = {102},
  journal   = {International journal of earth sciences},
  number    = {5},
  publisher = {Springer},
  address   = {New York},
  issn      = {1437-3254},
  doi       = {10.1007/s00531-013-0881-9},
  pages     = {1491 -- 1512},
  year      = {2013},
  abstract  = {The Sabzevar ophiolites mark the Neotethys suture in east-north-central Iran. The Sabzevar metamorphic rocks, as part of the Cretaceous Sabzevar ophiolitic complex, consist of blueschist, amphibolite and greenschist. The Sabzevar blueschists contain sodic amphibole, epidote, phengite, calcite +/- A omphacite +/- A quartz. The epidote amphibolite is composed of sodic-calcic amphibole, epidote, albite, phengite, quartz +/- A omphacite, ilmenite and titanite. The greenschist contains chlorite, plagioclase and pyrite, as main minerals. Thermobarometry of a blueschist yields a pressure of 13-15.5 kbar at temperatures of 420-500 A degrees C. Peak metamorphic temperature/depth ratios were low (similar to 12 A degrees C/km), consistent with metamorphism in a subduction zone. The presence of epidote in the blueschist shows that the rocks were metamorphosed entirely within the epidote stability field. Amphibole schist samples experienced pressures of 5-7 kbar and temperatures between 450 and 550 A degrees C. The presence of chlorite, actinolite, biotite and titanite indicate greenschist facies metamorphism. Chlorite, albite and biotite replacing garnet or glaucophane suggests temperatures of > 300 A degrees C for greenschist facies. The formation of high-pressure metamorphic rocks is related to north-east-dipping subduction of the Neotethys oceanic crust and subsequent closure during lower Eocene between the Central Iranian Micro-continent and Eurasia (North Iran).},
  language  = {en}
}
@article{OmraniMoazzenOberhaensli2018,
  author    = {Omrani, Hadi and Moazzen, Mohssen and Oberh{\"a}nsli, Roland},
  title     = {Geodynamic evolution of the Sabzevar zone, northern central Iranian micro-continent},
  series = {Mineralogy and petrology},
  volume    = {112},
  journal   = {Mineralogy and petrology},
  number    = {1},
  publisher = {Springer},
  address   = {Wien},
  issn      = {0930-0708},
  doi       = {10.1007/s00710-017-0505-3},
  pages     = {65 -- 83},
  year      = {2018},
  abstract  = {The Northern Central Iranian Micro-continent (CIM) represents Neotethys-related oceanic crust remnants, emplaced due to convergence between CIM and Eurasia plates during Eocene. Mafic and ultramafic units are exposed along the northern part of the CIM in the Sabzevar area. The geology and field relation of Sabzevar ophiolite indicate northward subduction of the Sabzevar basin. The average whole rock chemistry of mafic (gabbros) and ultramafic samples (lherzolite, harzburgite and dunite) is characterized by a range of MgO of 11.16-31.88, CaO 5.22-11.53 and Al2O3 2.77-14.57, respectively. Low LREE/HREE ratio of ultramafic samples is accompanied by enrichment of large ion lithophile elements (LILE) such as Sr, Pb and K. Mafic samples show two distinct groups with low and high LREE/HREE ratios. The spider diagram of mafic samples indicates enrichment in Sr, Pb and K and depletion in REE. Petrological and geochemical evidence and field relations show that the mafic rocks formed in a supra-subduction zone setting. Petrological studies reveal the role of fractional crystallization and assimilation effect by released fluids during subduction related generation of the Sabzevar mafic rocks. We suggest that the studied mafic rocks likely represent the basement of an initial island arc, which was generated in a supra-subduction zone setting within the Neotethys branch of the Sabzevar Ocean at the north of CIM. Copper, gold and chromite mineralizations are studied in relation to island arc setting and supra-subduction environment. Similarities in lithology, ophiolite age and mineralization between Sabzevar ophiolite and Bardaskan-Torbat Heydariyeh ophiolites testify for their separation due to rotation (or faulting) of the Central Iranian Micro-continent.},
  language  = {en}
}
@misc{OmraniMoazzenOberhaenslietal.2013,
  author    = {Omrani, H. and Moazzen, Mohssen and Oberh{\"a}nsli, Roland and Tsujimori, T. and Bousquet, Romain and Moayyed, M.},
  title     = {Metamorphic history of glaucophane-paragonite-zoisite eclogites from the Shanderman area, northern Iran},
  series = {Journal of metamorphic geology},
  volume    = {31},
  journal   = {Journal of metamorphic geology},
  number    = {8},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {0263-4929},
  doi       = {10.1111/jmg.12045},
  pages     = {791 -- 812},
  year      = {2013},
  abstract  = {The Shanderman eclogites and related metamorphosed oceanic rocks mark the site of closure of the Palaeotethys ocean in northern Iran. The protolith of the eclogites was an oceanic tholeiitic basalt with MORB composition. Eclogite occurs within a serpentinite matrix, accompanied by mafic rocks resembling a dismembered ophiolite. The eclogitic mafic rocks record different stages of metamorphism during subduction and exhumation. Minerals formed during the prograde stages are preserved as inclusions in peak metamorphic garnet and omphacite. The rocks experienced blueschist facies metamorphism on their prograde path and were metamorphosed in eclogite facies at the peak of metamorphism. The peak metamorphic mineral paragenesis of the rocks is omphacite, garnet (pyrope-rich), glaucophane, paragonite, zoisite and rutile. Based on textural relations, post-peak stages can be divided into amphibolite and greenschist facies. Pressure and temperature estimates for eclogite facies minerals (peak of metamorphism) indicate 15-20kbar at similar to 600 degrees C. The pre-peak blueschist facies assemblage yields <11kbar and 400-460 degrees C. The average pressure and temperature of the post-peak amphibolite stage was 5-6kbar, similar to 470 degrees C. The Shanderman eclogites were formed by subduction of Palaeotethys oceanic crust to a depth of no more than 75km. Subduction was followed by collision between the Central Iran and Turan blocks, and then exhumation of the high pressure rocks in northern Iran.},
  language  = {en}
}
@article{OberhaensliWendtGoffeetal.1999,
  author    = {Oberh{\"a}nsli, Roland and Wendt, A. S. and Goffe, B. and Michard, Andre},
  title     = {Detrital chromites in metasediments of East-Arabian continental margin in te Saih Hatat area : constraints for the palaeogeographic setting of the Hawasina and Semail basins (Oman Mountains)},
  year      = {1999},
  language  = {en}
}
@article{OberhaensliPartzschCandanetal.2000,
  author    = {Oberh{\"a}nsli, Roland and Partzsch, Julius and Candan, O. and Cetinkaplan, Mete},
  title     = {First occurrence of Fe-Mg-carpholite documenting a high pressure metamorphism in the metasediments of the Lycian nappes, SW Turkey},
  year      = {2000},
  language  = {en}
}
@article{OberhaensliNegendank1997,
  author    = {Oberh{\"a}nsli, Roland and Negendank, J{\"o}rg F. W.},
  title     = {Natural and anthropogenic influences on the geochemistry of Quaternary lake sediments from Holzmaar, Germany},
  year      = {1997},
  language  = {en}
}
@article{OberhaensliKoralayCandanetal.2013,
  author    = {Oberh{\"a}nsli, Roland and Koralay, E. and Candan, Osman and Pourteau, Amaury and Bousquet, Romain},
  title     = {Late cretaceous eclogitic high-pressure relics in the Bitlis Massif},
  series = {Geodinamica acta : revue de g{\´e}ologie dynamique et de g{\´e}ographie physique},
  volume    = {26},
  journal   = {Geodinamica acta : revue de g{\´e}ologie dynamique et de g{\´e}ographie physique},
  number    = {3-4},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {0985-3111},
  doi       = {10.1080/09853111.2013.858951},
  pages     = {175 -- 190},
  year      = {2013},
  abstract  = {A new occurrence of eclogites was found in the Kesandere valley in the eastern most part of the Bitlis complex, SE Anatolia. These high-pressure (HP) relics were preserved in calc-arenitic metasediments within the high-grade metamorphic basement of the Bitlis complex. The eclogitic parageneses were strongly overprinted during decompression and heating. These new eclogites locality complements the evidence of blueschist-facies metamorphism documented recently in the meta-sedimentary cover sequence of this part of the Bitlis complex. Thermodynamic calculations suggest peak conditions of ca. 480-540 degrees C/1.9-2.4GPa. New U/Pb dates of 84.4 +/-.9 and 82.4 +/-.9Ma were obtained on zircons from two Kesandere eclogite samples. On the basis of geochemical criteria, these dates are interpreted to represent zircon crystallization during the eclogitic peak stage. Kesandere eclogites differ from those previously described in the western Bitlis complex (Mt. Gablor locality) in terms of lithologic association, protolithic origin, and peak P-T conditions (600-650 degrees C/1.0-2.0GPa, respectively). On the other hand, eclogitic metamorphism of Kesandere metasediments occurred shortly before blueschist-facies metamorphism of the sedimentary cover (79-74Ma Ar-40/Ar-39 white mica). Therefore, the exhumation of Kesandere eclogites started between ca. 82 and 79Ma, while the meta-sedimentary cover was being buried. During this short time span, Kesandere eclogite were likely uplifted from similar to 65 to 35km depth, indicating a syn-subduction exhumation rate of similar to 4.3mm/a. Subsequently, eclogite- and blueschist-facies rocks were likely retrogressed contemporarily during collision-type metamorphism (around 72-69Ma). The Bitlis HP rocks thus sample a subduction zone that separated the Bitlis-Puturge (Bistun?) block from the South-Armenian block, further north. To the south, Eocene metasediments of the Urse formation are imbricated below the Bitlis complex. They contain (post Eocene) blueschists, testifying separation from the Arabian plate and southward migration of the subduction zone. The HT overprint of Kesandere eclogites can be related to the asthenospheric flow provoked by subducting slab retreat or break off.},
  language  = {en}
}
@article{OberhaensliGoffeBousquet1995,
  author    = {Oberh{\"a}nsli, Roland and Goffe, B. and Bousquet, Romain},
  title     = {Record of a HP-LT metamorphic evolution in the Valais zone : Geodynamics implications},
  issn      = {0392 - 758X},
  year      = {1995},
  language  = {en}
}
@article{OberhaensliCandanDoraetal.1997,
  author    = {Oberh{\"a}nsli, Roland and Candan, O. and Dora, O. and D{\"u}rr, S.},
  title     = {Eclogites within the Menderes Massif / western Turkey},
  year      = {1997},
  language  = {en}
}
@article{OberhaensliBousquetGoffe2003,
  author    = {Oberh{\"a}nsli, Roland and Bousquet, Romain and Goffe, B.},
  title     = {Comment to "Chloritoid composition and formation in the eastern Central Alps : a comparison between Penninic and Helvetic occurrences" by M. Rahn, M. Steinmann and M. Frey},
  issn      = {0036-7699},
  year      = {2003},
  language  = {en}
}
@article{OberhaensliBousquetCandanetal.2012,
  author    = {Oberh{\"a}nsli, Roland and Bousquet, Romain and Candan, Osman and Okay, Aral I.},
  title     = {Dating subduction events in East Anatolia, Turkey},
  series = {Turkish journal of earth sciences = T{\"u}rk yerbilimleri dergisi},
  volume    = {21},
  journal   = {Turkish journal of earth sciences = T{\"u}rk yerbilimleri dergisi},
  number    = {1},
  publisher = {T{\"u}bitak},
  address   = {Ankara},
  issn      = {1300-0985},
  doi       = {10.3906/yer-1006-26},
  pages     = {1 -- 17},
  year      = {2012},
  abstract  = {Metamorphic studies in the cover sequences of the Bitlis complex allow the thermal evolution of the massif to be constrained using metamorphic index minerals. Regionally distributed metamorphic index minerals such as glaucophane, carpholite, relics of carpholite in chloritoid-bearing schists and pseudomorphs after aragonite in marbles record a LT-HP evolution:This demonstrates that the Bitlis complex was subducted and stacked to form a nappe complex during the closure of the Neo-Tethys. During late Cretaceous to Cenozoic evolution the Bitlis complex experienced peak metamorphism of 1.0-1.1 GPa at 350-400 degrees C. During the retrograde evolution temperatures remained below 460 degrees C. Ar-39/Ar-40 dating of white mica in different parageneses from the Bitlis complex reveals a 74-79 Ma (Campanian) date of peak metamorphism and rapid exhumation to an almost isothermal greenschist stage at 67-70 Ma (Maastrichtian). The HP Eocene flysch escaped the greenschist facies stage and were exhumed under very cold conditions. These single stage evolutions contrast with the multistage evolution reported further north from the Amassia-Stepanavan Suture in Armenia. Petrological investigations and isotopic dating show that the collision of Arabia with Eurasia resulted in an assemblage of different blocks derived from the northern as well as from the southern plate and a set of subduction zones producing HP rocks with diverse exhumation histories.},
  language  = {en}
}
@article{Oberhaensli2020,
  author    = {Oberh{\"a}nsli, Roland},
  title     = {Deep-time Digital Earth (DDE) the first IUGS big science program},
  series = {Journal of the Geological Society of India},
  volume    = {95},
  journal   = {Journal of the Geological Society of India},
  number    = {3},
  publisher = {Springer India},
  address   = {New Delhi},
  issn      = {0016-7622},
  doi       = {10.1007/s12594-020-1420-5},
  pages     = {223 -- 226},
  year      = {2020},
  language  = {en}
}
@article{Oberhaensli2013,
  author    = {Oberh{\"a}nsli, Roland},
  title     = {High-Pressure - Low-temperature evolution in the Indus-Tsangpo suture along the Kohistan Arc (Kaghan Valley, NE Pakistan)},
  series = {Episodes : journal of international geosciences},
  volume    = {36},
  journal   = {Episodes : journal of international geosciences},
  number    = {2},
  publisher = {Geological Society of India},
  address   = {Bangalore},
  issn      = {0705-3797},
  pages     = {87 -- 93},
  year      = {2013},
  abstract  = {North of Naran in the Kaghan Valley (NE Pakistan), the metabasites of the melange units lying below the Kohistan Arc, contain glaucophane. Typically they reflect blueschist-metamorphic conditions (0.7 GPa, 400 degrees C). Associated graphite-rich metapelites with quartz veins underwent upper greenschist to amphibolite conditions. Near Naran we observed in quartz grains of type 3 veins first minute relics of Fe-Mg carpholite indicating earlier blueschist metamorphic conditions. P-T estimates indicate 1.2-1.6 GPa at 380-410 degrees C, pressure and temperature values typical for blueschist metamorphic conditions. Changes in mineral assemblages and abundant sudoite component in associated chlorite point to a pressure drop after peak I conditions. We assign the observed changes to peak I conditions occurring during a Cretaceous subduction event. Temperatures estimated with Raman graphite-thermometry clearly indicate a significant subsequent rise of post-peak I temperatures up to 500 degrees C. This is compatible with the amphibolite peak II assigned to the Tertiary continental collision that leads to subduction of the Indian Plate and ultra-high-pressure metamorphism. During subduction the blueschist metamorphic metapelites underwent dehydration, which caused alteration in the overlying lithospheric mantle. In a hydrated lithospheric mantle density is significantly reduced which enhanced subduction of continental crust in the Higher Himalaya. This P-T evolution is typical for a collision orogen with a high plateau but remarkably contrasting findings from Eastern Anatolia, where plateau building is in "statu nascendi" (e.g., Oberh{\"a}nsli et al., 2010).},
  language  = {en}
}
@article{Oberhaensli1998,
  author    = {Oberh{\"a}nsli, Roland},
  title     = {The age of blueschist metamorphiosm ion the Mesozoic cover series of the Menderes massif},
  year      = {1998},
  language  = {en}
}
@article{Oberhaensli1998,
  author    = {Oberh{\"a}nsli, Roland},
  title     = {The tectono-metamorphic signature of detachments in high-pressure mountain belts, Tethyan examples},
  year      = {1998},
  language  = {en}
}
@article{MoazzenOberhaensliHajialioghlietal.2009,
  author    = {Moazzen, Mohssen and Oberh{\"a}nsli, Roland and Hajialioghli, Robab and Moeller, Andreas and Bousquet, Romain and Droop, Giles and Jahangiri, Ahmad},
  title     = {Peak and post-peak P-T conditions and fluid composition for scapolite-clinopyroxene-garnet calc-silicate rocks from the Takab area, NW Iran},
  issn      = {0935-1221},
  doi       = {10.1127/0935-1221/2009/0021-1887},
  year      = {2009},
  abstract  = {The Takab calcareous rocks of northwest Iran crop out in association with a variety of metamorphic rocks including mafic granulites, amphibolites, granitic gneisses, pelitic schists and meta-ultramafic rocks. They can be divided into marbles and calc-silicate rocks on the basis of the dominance of calcite/dolomite and silicate minerals. Dominant peak metamorphic granulite facies assemblage of calc-silicate rocks is Scp + Grt(I) + Cpx + Cal + Qtz +/- Hbl(I). The decrease of temperature and pressure during exhumation produced post-peak metamorphic assemblages. Coronal garnet (Grt II) in the calc-silicate rocks was produced by retrograde reactions consuming plagioclase and clinopyroxene, while peak metamorphic garnet (Grt I) occurs as preserved xenoblastic grains in calcite and/or plagioclase (Pl II). Regional metamorphism took place at 740 degrees C and X-CO2 similar to 0.9. Garnet-clinopyroxene-plagioclase-quartz (GADS) barometry yields a pressure of 8-9 kbar, corresponding to a depth of ca. 24-27 km. This was followed by decompression and hydration during exhumation of the crustal rocks up to the surface. Secondary phases such as garnet (II) hornblende (II), plagioclase (II), zoisite and titanite (II) constrain the temperature and pressure of post-peak metamorphism as similar to 600 degrees C and similar to 6 kbar respectively and a fluid with XCO2 as low as 0.4. Halogens were near-absent during the peak metamorphic stage. The scapolite and hornblende crystallized underpeak metamorphic conditions contain very low fluorine and chlorine, whereas relatively high fluorine (similar to 0.8 wt\%) in the titanite (II) and hornblende (II) suggests a possible infiltration of F-rich fluids into the calc-silicate rocks during retrogression. It is interpreted to be related to external fluids released during crystallisation of granitoid magmas and/or leucosome patches in the adjacent migmatites.},
  language  = {en}
}
@article{MesbahiMohajjelOberhaenslietal.2017,
  author    = {Mesbahi, Fatemeh and Mohajjel, Mohammad and Oberh{\"a}nsli, Roland and Moazzen, Mohsen},
  title     = {The mafic rocks along the North Tabriz Fault, possible remnants of Neo-Tethys oceanic crust in NW Iran},
  series = {Geopersia},
  volume    = {7},
  journal   = {Geopersia},
  publisher = {Graduate Faculty of Environment, University of Theran},
  address   = {Tehran},
  issn      = {2228-7817},
  doi       = {10.22059/geope.2017.232747.648323},
  pages     = {301 -- 311},
  year      = {2017},
  abstract  = {The North Tabriz Fault is seismologically an active fault with current right lateral strike-slip movements. Restricted mafic to intermediate Fate Cretaceous igneous rocks are exposed along the North Tabriz Fault. Whole rock and clinopyroxene phenocrysts geochemistry were studied in order to characterize the petrogenesis of these mafic rocks and their possible relation to an oceanic crust. The results indicate a tholeiitic parental magma that formed in an evolved mid-ocean ridge tectonic setting similar to the Iceland mid-Atlantic ridge basalts. The ocean floor basalt characteristics give evidence of an oceanic crust along the North Tabriz Fault. Therefore, the trend of the North Tabriz Fault more likely marks a suture zone related to the closure of a branch of the Neo-Tethys Ocean in the NW Iran. This fault, in addition to the Caucasus and Zagros suture zones, compensates an important part of the convergence between the Arabian and Eurasian plates resulting from the Red Sea divergence. It is concluded that the North Tabriz Fault appears to be possible southeastern continuation of the North Anatolian suture zone.},
  language  = {en}
}
@article{LiuJahnDongetal.2003,
  author    = {Liu, Xiaochun and Jahn, Bor-Ming and Dong, Shuwen and Li, Huimin and Oberh{\"a}nsli, Roland},
  title     = {Neoproterozoic granitoid did not record ultrahigh-pressure metamorphism from the Southern Dabieshan of China},
  issn      = {0022-1376},
  year      = {2003},
  abstract  = {It has been often debated whether all granitic gneisses associated with coesite-bearing eclogites in southern Dabieshan, China, have also been subjected to ultrahigh-pressure (UHP) metamorphism. We show here that a metagranitoid adjacent to the Bixiling eclogite-ultramafic complex has preserved primary granitic textures and an igneous mineral assemblage of biotite + plagioclase + microcline + quartz + allanite +/- amphibole. The absence of UPH recrystallization for the metagranitoid is particularly manifested by the conservation of euhedral-zoned plagioclase phenocrysts, the lack of corona garnets around igneous biotite, and the presence of an igneous mineral assemblage in zircons. The only metamorphic overprint was the epidote-amphibolite facies metamorphism characterized by the assemblage of biotite + phengiticmica + epidote + albite + K-feldspar + quartz +/- amphibole Metamorphic conditions are estimated at ca. 550degrees-680degreesC and 6-13 kbar for the metagranitoid and its amphibolitic enclave. Geochemically, the metagranitoid is similar to its country gneiss and shows an affinity to volcanic arc granitoid. Zircon U-Pb dating suggests that the Bixiling metagranitoid was emplaced during the Neoproterozoic (729+/-4 Ma), when most other granitic rocks and the protoliths of eclogite were also formed in Dabieshan. Taking into account the discovery of non-UHP granitic gneisses in other places, we argue that part of Neoproterozoic granitic rocks in the Dabieshan and Sulu terranes have escaped UHP metamorphism during the Triassic deep subduction of the continental crust as a consequence of a lack of penetrative deformation and fluid-rock interaction},
  language  = {en}
}
@article{LambertOberhaensli2014,
  author    = {Lambert, Ian and Oberh{\"a}nsli, Roland},
  title     = {Towards more effective risk reduction: Catastrophic tsunami},
  series = {Episodes : journal of international geosciences},
  volume    = {37},
  journal   = {Episodes : journal of international geosciences},
  number    = {4},
  publisher = {Geological Society of India},
  address   = {Bangalore},
  issn      = {0705-3797},
  pages     = {229 -- 233},
  year      = {2014},
  abstract  = {The International Union of Geological Sciences (JUGS) is evaluating whether there are additional geoscientific activities that would be beneficial in helping mitigate the impacts of tsunami. Public concerns about poor decisions and inaction, and advances in computing power and data mining call for new scientific approaches. Three fundamental requirements for mitigating impacts of natural hazards are defined. These are: (1) improvement of process-oriented understanding, (2) adequate monitoring and optimal use of data, and (3) generation of advice based on scientific, technical and socio-economic expertise. International leadership/coordination is also important. To increase the capacity to predict and mitigate the impacts of tsunami and other natural hazards a broad consensus is needed. The main needs include the integration of systematic geological inputs - identifying and studying paleo-tsunami deposits for all subduction zones; optimising coverage and coordination of geodetic and seismic monitoring networks; underpinning decision making at national and international scales by developing appropriate mechanisms for gathering, managing and communicating authoritative scientific and technical advice information; international leadership for coordination and authoritative statements of best approaches. All these suggestions are reflected in the Sendai Agreement, the collective views of the experts at the International Workshop on Natural Hazards, presented later in this volume.},
  language  = {en}
}
@article{LambertDurrheimGodoyetal.2013,
  author    = {Lambert, Ian and Durrheim, Ray and Godoy, Marcio and Kota, Mxolisi and Leahy, Pat and Ludden, John and Nickless, Edmund and Oberh{\"a}nsli, Roland and Anjian, Wang and Williams, Neil},
  title     = {Resourcing future generations a proposed new IUGS initiative},
  series = {Episodes : journal of international geosciences},
  volume    = {36},
  journal   = {Episodes : journal of international geosciences},
  number    = {2},
  publisher = {Geological Society of India},
  address   = {Bangalore},
  issn      = {0705-3797},
  pages     = {82 -- 86},
  year      = {2013},
  language  = {en}
}
@article{KronerOberhaensliMezgeretal.1998,
  author    = {Kroner, Alfred and Oberh{\"a}nsli, Roland and Mezger, Klaus and Teklay, M.},
  title     = {Geochemistry, Pb-Pb single zircon ages and Nd-Sr isotope composition of Precambrian rocks from southern and eastern Ethiopia: implications for crustal evolution in east Africa},
  year      = {1998},
  language  = {en}
}
@article{KoziolOberhaensli1995,
  author    = {Koziol, M. and Oberh{\"a}nsli, Roland},
  title     = {Die s{\"u}dliche Eklogitzone im {\"O}tztal},
  year      = {1995},
  language  = {de}
}