TY - JOUR A1 - Altenberger, Uwe A1 - Oberhänsli, Roland A1 - Stein, Eckehard A1 - Moghni, Mohsen T1 - Geochemistry, tectonic setting and geodynamic position of late orogenic dikes in the Melibocus Massiv, Bergstraesser Odenwald Y1 - 2001 ER - TY - JOUR A1 - Stein, Eckehard A1 - Altenberger, Uwe A1 - Kreher, Birgit T1 - Zur Geologie des kristallinen Odenwaldes : seine magmatische und metamorphe Entwicklung Y1 - 2001 ER - TY - JOUR A1 - Wilhelm, Stefan A1 - Altenberger, Uwe A1 - Oberhänsli, Roland T1 - Intrusive marbles in the Ivrea Zone (Italy) : evidence for melting of metacarbonates Y1 - 2001 ER - TY - JOUR A1 - Reischmann, Thomas A1 - Jaeckel, Petra A1 - Anthes, Gerold A1 - Altenberger, Uwe T1 - Age and origin of the Böllsteiner Odenwald Y1 - 2000 ER - TY - JOUR A1 - Poller, Ulrike A1 - Altenberger, Uwe A1 - Schubert, Wolfgang T1 - Back-arc magmatism in the Odenwald : geochemical characteristics of the amphibolites of the Bergsträßer Odenwald Y1 - 2000 ER - TY - JOUR A1 - Altenberger, Uwe A1 - Wilhelm, Stefan T1 - Ductile deformation of K-feldspar in eclogite facies shear zones in the Bergen Arcs, Norway : tectonophysics Y1 - 2000 ER - TY - GEN A1 - Altenberger, Uwe T1 - Stress-induced natural transformation of ortho- to clinohypersthene in metagabbros of the Ivrea Zone, Northern Italy N2 - Orthopyroxenes of a high temperature protomylonite of the Ivrea Zone, Northern Italy show twin like polysynthetic lamellae parallel to {210} of the hypersthene host. The transformation is caused by plastic deformation under high metamorphic conditions which has resulted in dynamic recrystallization of pyroxene and plagioclase. The lamellae consist of clinohypersthene. The twin plane and the lamellar clino-orthoinversion of hypersthene due to natural deformation have not been described hitherto. N2 - Orthopyroxene aus hoch temperierten Protomyloniten der Ivrea-Zone, Nord Italien zeigen polysynthetische Lamellen parallel {210} des Wirtes. Ihr Erscheinungsbild entspricht Deformationszwillingen. Die Lamellen sind invertiert zu Klinohypersthen. Die Ortho-Klino-Transformation ist auf eine Hochtemperaturdeformation zurückzuführen, wie dies anhand der dynamischen Rekristallisation der Pyroxene und Plagioklase bewiesen werden kann. Weder die speziellen Verwachsungsflächen noch die Ortho-Klino-Inversion durch natürliche Deformation wurden bisher beschrieben. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 099 Y1 - 1992 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-40778 ER - TY - JOUR A1 - Körting, Friederike Magdalena A1 - Köllner, Nicole A1 - Kuras, Agnieszka A1 - Bösche, Nina Kristin A1 - Rogass, Christian A1 - Mielke, Christian A1 - Elger, Kirsten A1 - Altenberger, Uwe T1 - A solar optical hyperspectral library of rare-earth-bearing minerals, rare-earth oxide powders, copper-bearing minerals and Apliki mine surface samples JF - Earth system science data : ESSD N2 - Mineral resource exploration and mining is an essential part of today's high-tech industry. Elements such as rare-earth elements (REEs) and copper are, therefore, in high demand. Modern exploration techniques from multiple platforms (e.g., spaceborne and airborne), to detect and map the spectral characteristics of the materials of interest, require spectral libraries as an essential reference. They include field and laboratory spectral information in combination with geochemical analyses for validation. Here, we present a collection of REE- and copper-related hyperspectral spectra with associated geochemical information. The libraries contain reflectance spectra from rare-earth element oxides, REE-bearing minerals, copper-bearing minerals and mine surface samples from the Apliki copper-gold-pyrite mine in the Republic of Cyprus. The samples were measured with the HySpex imaging spectrometers in the visible and near infrared (VNIR) and shortwave infrared (SWIR) range (400-2500 nm). The geochemical validation of each sample is provided with the reflectance spectra. The spectral libraries are openly available to assist future mineral mapping campaigns and laboratory spectroscopic analyses. The spectral libraries and corresponding geochemistry are published via GFZ Data Services with the following DOIs: https://doi.org/10.5880/GFZ.1.4.2019.004 (13 REE-bearing minerals and 16 oxide powders, Koerting et al., 2019a), https://doi.org/10.5880/GFZ.1.4.2019.003 (20 copper-bearing minerals, Koellner et al., 2019), and https://doi.org/10.5880/GFZ.1.4.2019.005 (37 copper-bearing surface material samples from the Apliki coppergold-pyrite mine in Cyprus, Koerting et al., 2019b). All spectral libraries are united and comparable by the internally consistent method of hyperspectral data acquisition in the laboratory. Y1 - 2021 U6 - https://doi.org/10.5194/essd-13-923-2021 SN - 1866-3508 SN - 1866-3516 VL - 13 SP - 923 EP - 942 PB - Copernics Publications CY - Katlenburg-Lindau ER - TY - JOUR A1 - Vasquez, Mónica A1 - Altenberger, Uwe A1 - Romer, Rolf L. A1 - Sudo, Masafumi A1 - Moreno-Murillo, Juan Manuel T1 - Magmatic evolution of the Andean Eastern Cordillera of Colombia during the Cretaceous : Influence of previous tectonic processes N2 - The Eastern Cordillera of the Colombian Andes represents an inverted Cretaceous basin where Cretaceous magmatism is characterized by rare mafic dykes and sills. We use Ar-40/Ar-39, Sr-Nd-Pb isotopes, as well as major and trace elements analyses of Cretaceous intrusions from both flanks of the Eastern Cordillera in combination with structural data to document the complex evolution of the basin. Magmatism, which is diachronous and geochemically diverse, seems to be related to mantle melting beneath the most subsiding segments of each sub-basin during enhanced extensional tectonics. The mafic intrusions display two different compositional series: an alkaline one with OIB-like pattern and a tholeiitic one with MORB-like features. This indicates at least two diverse mantle sources. Trace-element patterns suggest that the intrusions were emplaced in an extensional setting. Ar-40/Ar-39 dating on primary plagioclase and hornblende provides plateau ages between similar to 136 and similar to 74 Ma. The geochemical and temporal diversities show that the emplacement of the magmas was tectonically controlled, each sub-basin reflecting an individual subsidence event. Y1 - 2010 UR - http://www.sciencedirect.com/science/journal/08959811 U6 - https://doi.org/10.1016/j.jsames.2009.02.003 SN - 0895-9811 ER - TY - GEN A1 - Terbishalieva, Baiansuluu A1 - Timmerman, Martin Jan A1 - Mikolaichuk, Alexander A1 - Altenberger, Uwe A1 - Slama, Jiri A1 - Schleicher, Anja Maria A1 - Sudo, Masafumi A1 - Sobel, Edward A1 - Cichy, Sarah Bettina T1 - Calc-alkaline volcanic rocks and zircon ages of the late Tonian BT - Early Cryogenian arc-related Big Naryn Complex in the Eastern Djetim-Too Range, Middle Tianshan block, Kyrgyzstan T2 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe N2 - The Big Naryn Complex (BNC) in the East Djetim-Too Range of the Kyrgyz Middle Tianshan block is a tectonized, at least 2 km thick sequence of predominantly felsic to intermediate volcanic rocks intruded by porphyric rhyolite sills. It overlies a basement of metamorphic rocks and is overlain by late Neoproterozoic Djetim-Too Formation sediments; these also occur as tectonic intercalations in the BNC. The up to ca. 1100 m thick Lower Member is composed of predominantly rhyolites-to-dacites and minor basalts, while the at least 900 m thick pyroclastic Upper Member is dominated by rhyolitic-to-dacitic ignimbrites. Porphyric rhyolite sills are concentrated at the top of the Lower Member. A Lower Member rhyolite and a sill sample have LA-ICP-MS U-Pb zircon crystallization ages of 726.1 +/- 2.2 Ma and 720.3 +/- 6.5 Ma, respectively, showing that most of the magmatism occurred within a short time span in the late Tonian-early Cryogenian. Inherited zircons in the sill sample have Neoarchean (2.63, 2.64 Ga), Paleo- (2.33-1.81 Ga), Meso- (1.55 Ga), and Neoproterozoic (ca. 815 Ma) ages, and were derived from a heterogeneous Kuilyu Complex basement. A 1751 +/- 7 Ma Ar-40/Ar-39 age for amphibole from metagabbro is the age of cooling subsequent to Paleoproterozoic metamorphism of the Kuilyu Complex. The large amount of pyroclastic rocks, and their major and trace element compositions, the presence of Neoarchean to Neoproterozoic inherited zircons and a depositional basement of metamorphic rocks point to formation of the BNC in a continental magmatic arc setting. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1361 KW - Tianshan orogenic belt KW - Big Naryn complex KW - Tonian–Cryogenian KW - magmatic arc KW - calc-alkaline KW - Kuilyu complex Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-569585 SN - 1437-3254 SN - 1437-3262 SN - 1866-8372 IS - 1 ER -