Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Quelle der Hochschulschrift Konferenzname Quelle:Titel Quelle:Jahrgang Quelle:Heftnummer Quelle:Erste Seite Quelle:Letzte Seite URN DOI Abteilungen OPUS4-37724 Wissenschaftlicher Artikel Schildgen, Taylor F.; Cosentino, D.; Frijia, Gianluca; Castorina, F.; Dudas, F. Oe.; Iadanza, A.; Sampalmieri, G.; Cipollari, Paola; Caruso, A.; Bowring, S. A.; Strecker, Manfred Sea level and climate forcing of the Sr isotope composition of late Miocene Mediterranean marine basins Sr isotope records from marginal marine basins track the mixing between seawater and local continental runoff, potentially recording the effects of sea level, tectonic, and climate forcing in marine fossils and sediments. Our 110 new Sr-87/Sr-86 analyses on oyster and foraminifera samples from six late Miocene stratigraphic sections in southern Turkey, Crete, and Sicily show that Sr-87/Sr-86 fell below global seawater values in the basins several million years before the Messinian Salinity Crisis, coinciding with tectonic uplift and basin shallowing. 87Sr/86Sr from more centrally located basins (away from the Mediterranean coast) drop below global seawater values only during the Messinian Salinity Crisis. In addition to this general trend, 55 new Sr-87/Sr-86 analyses from the astronomically tuned Lower Evaporites in the central Apennines (Italy) allow us to explore the effect of glacio-eustatic sea level and precipitation changes on Sr-87/Sr-86. Most variation in our data can be explained by changes in sea level, with greatest negative excursions from global seawater values occurring during relative sea level lowstands, which generally coincided with arid conditions in the Mediterranean realm. We suggest that this greater sensitivity to lowered sea level compared with higher runoff could relate to the inverse relationship between Sr concentration and river discharge. Variations in the residence time of groundwater within the karst terrain of the circum-Mediterranean region during arid and wet phases may help to explain the single (robust) occurrence of a negative excursion during a sea level highstand, but this explanation remains speculative without more detailed paleoclimatic data for the region. Washington American Geophysical Union 2014 20 Geochemistry, geophysics, geosystems 15 7 2964 2983 10.1002/2014GC005332 Institut für Geowissenschaften OPUS4-37372 Wissenschaftlicher Artikel Montero-Lopez, Carolina; Strecker, Manfred; Schildgen, Taylor F.; Hongn, Fernando D.; Guzman, Silvina; Bookhagen, Bodo; Sudo, Masafumi Local high relief at the southern margin of the Andean plateau by 9 Ma: evidence from ignimbritic valley fills and river incision A valley-filling ignimbrite re-exposed through subsequent river incision at the southern margin of the Andean (Puna) plateau preserves pristine geological evidence of pre-late Miocene palaeotopography in the north western Argentine Andes. Our new Ar-40/(39) Ar dating of the Las Papas Ignimbrites yields a plateau age of 9.24 +/- 0.03 Ma, indicating valley-relief and orographic-barrier conditions comparable to the present-day. A later infill of Plio-Pleistocene coarse conglomerates has been linked to wetter conditions, but resulted in no additional net incision of the Las Papas valley, considering that the base of the ignimbrite remains unexposed in the valley bottom. Our observations indicate that at least 550 m of local plateau margin relief (and likely > 2 km) existed by 9 Ma at the southern Puna margin, which likely aided the efficiency of the orographic barrier to rainfall along the eastern and south eastern flanks of the Puna and causes aridity in the plateau interior. Hoboken Wiley-Blackwell 2014 7 Terra nova 26 6 454 460 10.1111/ter.12120 Institut für Geowissenschaften OPUS4-37362 Wissenschaftlicher Artikel Rohrmann, Alexander; Strecker, Manfred; Bookhagen, Bodo; Mulch, Andreas; Sachse, Dirk; Pingel, Heiko; Alonso, Ricardo N.; Schildgen, Taylor F.; Montero, Carolina Can stable isotopes ride out the storms? The role of convection for water isotopes in models, records, and paleoaltimetry studies in the central Andes Amsterdam Elsevier 2014 9 Earth & planetary science letters 407 187 195 10.1016/j.epsl.2014.09.021 Institut für Geowissenschaften OPUS4-38328 Wissenschaftlicher Artikel Schildgen, Taylor F.; Yildirim, C.; Cosentino, Domenico; Strecker, Manfred Linking slab break-off, Hellenic trench retreat, and uplift of the Central and Eastern Anatolian plateaus Amsterdam Elsevier 2014 22 Earth science reviews : the international geological journal bridging the gap between research articles and textbooks 128 147 168 10.1016/j.earscirev.2013.11.006 Institut für Umweltwissenschaften und Geographie