TY  - JOUR
A1  - Altenberger, Uwe
A1  - Mejia Jimenez, D. M.
A1  - Günter, C.
A1  - Sierra Rodriguez, G. I.
A1  - Scheffler, F.
A1  - Oberhänsli, Roland
T1  - The Garzn Massif, Colombia-a new ultrahigh-temperature metamorphic complex in the early Neoproterozoic of northern South America
JF  - Mineralogy and petrology
N2  - The Garzn Complex of the Garzn Massif in SW Colombia is composed of the Vergel Granulite Unit (VG) and the Las Margaritas Migmatite Unit (LMM). Previous studies reveal peak temperature conditions for the VG of about 740 A degrees C. The present study considers the remarkable exsolution phenomena in feldspars and pyroxenes and titanium-in-quartz thermometry. Recalculated ternary feldspar compositions indicate temperatures around 900-1,000 A degrees C just at or above the ultra-high temperature-metamorphism (UHTM) boundary of granulites. The calculated temperatures range of exsolved ortho- and clinopyroxenes also supports the existence of an UHTM event. In addition, titanium-in-quartz thermometry points towards ultra-high temperatures. It is the first known UHTM crustal segment in the northern part of South America. Although a mean geothermal gradient of ca 38 A degrees C km(-1) could imply additional heat supply in the lower crust controlling this extreme of peak metamorphism, an alternative model is suggested. The formation of the Vergel Granulite Unit is supposed to be formed in a continental back-arc environment with a thinned and weakened crust behind a magmatic arc (Guapotn-Mancagua Gneiss) followed by collision. In contrast, rocks of the adjacent Las Margaritas Migmatite Unit display "normal" granulite facies temperatures and are formed in a colder lower crust outside the arc, preserved by the Guapotn-Mancagu Gneiss. Back-arc formation was followed by inversion and thickening of the basin. The three units that form the modern-day Garzn Massif, were juxtaposed upon each other during collision (at ca. 1,000 Ma) and exhumation. The collision leading to the deformation of the studied area is part of the Grenville orogeny leading to the amalgamation of Rodinia.
Y1  - 2012
U6  - https://doi.org/10.1007/s00710-012-0202-1
SN  - 0930-0708
VL  - 105
IS  - 3-4
SP  - 171
EP  - 185
PB  - Springer
CY  - Wien
ER  - 
TY  - JOUR
A1  - Günter, Roland
T1  - Die Fotografie und ihr Nutzen für die Wissenschaft [Sammelrezension]
JF  - Geographische Revue : Zeitschrift für Literatur und Diskussion
N2  - Rezensierte Werke: Lang, Horst: ... als der Pott noch kochte : Photographien aus dem Ruhrgebiet / Horst Lang. Mit einem Text von Andreas Rossmann. - Kongress: ... als der Pott noch kochte; (Bottrop) : 1998. - München : Schirmer/Mosel, 2000. - 13 S., 91 Bl. : zahlr. Ill. ISBN 3-88814-554-6*Pp. - ISBN 3-8296-0082-8 Schwarzweiß und Farbe : das Ruhrgebiet in der Fotografie ; [eine Ausstellung des Ruhrlandmuseums auf der Zeche Zollverein, 25. Juni bis 15. Oktober 2000 ; eine Ausstellung im Rahmen von HISTORAMA 2000] / Hrsg.: Ruhrlandmuseum Essen, Sigrid Schneider. - Kongress: Ausstellung ; (Essen) : 2000.06.25-10.15. - Bottrop ; Essen : Pomp, 2000. - 559 S. : zahlr. Ill. ISBN 3-89355-216-2*kart. War die Zukunft früher besser? : Visionen für das Ruhrgebiet ; [Katalog ; Begleitbuch zur Ausstellung "War die Zukunft Früher Besser? - Visionen für das Ruhrgebiet", 15. April bis 17. September 2000 im Rheinischen Industriemuseum Oberhausen, und vom 15. Oktober 2000 bis 14. Januar 2001 im Westfälischen Industriemuseum Dortmund] / Landschaftsverband Rheinland, Rheinisches Industriemuseum Oberhausen, in Zusammenarbeit mit dem Landschaftsverband Westfalen-Lippe ... - Bottrop [u.a.] : Pomp, 2000. - 351 S. : zahlr. Ill., Kt. - (Schriften / Landschaftsverband Rheinland, Rheinisches Industriemuseum Oberhausen ; Bd. 17) ISBN 3-89355-210-3*kart.
Y1  - 2001
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-24162
SN  - 1438-3039
VL  - 3
IS  - 1
SP  - 43
EP  - 52
ER  - 
TY  - JOUR
A1  - Günter, Roland
T1  - 10 Jahre IBA – und was nun?
BT  - Perspektiven für die Region nach der IBA
JF  - Geographische Revue : Zeitschrift für Literatur und Diskussion
Y1  - 2003
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-30547
SN  - 1438-3039
VL  - 5
IS  - 1
SP  - 7
EP  - 30
ER  - 
TY  - JOUR
A1  - Weber, Michael H.
A1  - Abu-Ayyash, Khalil
A1  - Abueladas, Abdel-Rahman
A1  - Agnon, Amotz
A1  - Al-Amoush, H.
A1  - Babeyko, Andrey
A1  - Bartov, Yosef
A1  - Baumann, M.
A1  - Ben-Avraham, Zvi
A1  - Bock, Günter
A1  - Bribach, Jens
A1  - El-Kelani, R.
A1  - Forster, A.
A1  - Förster, Hans-Jürgen
A1  - Frieslander, U.
A1  - Garfunkel, Zvi
A1  - Grunewald, Steffen
A1  - Gotze, Hans-Jürgen
A1  - Haak, Volker
A1  - Haberland, Christian
A1  - Hassouneh, Mohammed
A1  - Helwig, S.
A1  - Hofstetter, Alfons
A1  - Jackel, K. H.
A1  - Kesten, Dagmar
A1  - Kind, Rainer
A1  - Maercklin, Nils
A1  - Mechie, James
A1  - Mohsen, Amjad
A1  - Neubauer, F. M.
A1  - Oberhänsli, Roland
A1  - Qabbani, I.
A1  - Ritter, O.
A1  - Rumpker, G.
A1  - Rybakov, M.
A1  - Ryberg, Trond
A1  - Scherbaum, Frank
A1  - Schmidt, J.
A1  - Schulze, A.
A1  - Sobolev, Stephan Vladimir
A1  - Stiller, M.
A1  - Th, 
T1  - The crustal structure of the Dead Sea Transform
N2  - 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
Y1  - 2004
ER  -