Eynatten, Hilmar von

[["dc.bibliographiccitation.firstpage","E297"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Geology"],["dc.bibliographiccitation.lastpage","E298"],["dc.bibliographiccitation.volume","41"],["dc.contributor.author","Hetzel, Ralf"],["dc.contributor.author","Dunkl, Istvan"],["dc.contributor.author","Haider, Vicky L."],["dc.contributor.author","Strobl, Marcus"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.contributor.author","Ding, Lin"],["dc.contributor.author","Frei, Dirk"],["dc.date.accessioned","2018-11-07T09:20:47Z"],["dc.date.available","2018-11-07T09:20:47Z"],["dc.date.issued","2013"],["dc.identifier.doi","10.1130/G34504Y.1"],["dc.identifier.isi","000323277300006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28956"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Geological Soc Amer, Inc"],["dc.relation.issn","0091-7613"],["dc.title","Peneplain formation in southern Tibet predates the India-Asia collision and plateau uplift Reply"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","79"],["dc.bibliographiccitation.journal","Journal of Asian Earth Sciences"],["dc.bibliographiccitation.lastpage","98"],["dc.bibliographiccitation.volume","70-71"],["dc.contributor.author","Haider, Vicky L."],["dc.contributor.author","Dunkl, Istvan"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.contributor.author","Ding, Lin"],["dc.contributor.author","Frei, Dirk"],["dc.contributor.author","Zhang, L."],["dc.date.accessioned","2018-11-07T09:23:25Z"],["dc.date.available","2018-11-07T09:23:25Z"],["dc.date.issued","2013"],["dc.description.abstract","Highly elevated and well-preserved peneplains are characteristic geomorphic features of the Tibetan plateau in the northern Lhasa Terrane, north-northwest of Nam Co. The peneplains were carved in granitoids and in their metasedimentary host formations. We use multi-method geochronology (zircon U-Pb and [U-Th]/He dating and apatite fission track and [U-Th]/He dating) to constrain the post-emplacement thermal history of the granitoids and the timing and rate of final exhumation of the peneplain areas. LA-ICP-MS U-Pb geochronology of zircons yields two narrow age groups for the intrusions at around 118 Ma and 85 Ma, and a third group records Paleocene volcanic activity (63-58 Ma) in the Nam Co area. The low-temperature thermochronometers indicate common age groups for the entire Nam Co area: zircon (U-Th)/He ages cluster around 75 Ma, apatite fission track ages around 60 Ma and apatite (U-Th)/He ages around 50 Ma. Modelling of the thermochronological data indicates that exhumation of the basement blocks took place in latest Cretaceous to earliest Paleogene time. By Middle Eocene time the relief was already flat, documented by a thin alluvial sediment sequence covering a part of the planated area. The present-day horst and graben structure of the peneplains is a Late Cenozoic feature triggered by E-W extension of the Tibetan Plateau. The new thermochronological data precisely bracket the age of the planation to Early Eocene, i.e. between ca. 55 and 45 Ma. The erosional base level can be deduced from the presence of Early Cretaceous zircon grains in Eocene strata of Bengal Basin. The sediment generated during exhumation of the Nam Co area was transported by an Early Cenozoic river system into the ocean, suggesting that planation occurred at low elevation. (C) 2013 Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","German Research Foundation (DFG) [DU 373-5]"],["dc.identifier.doi","10.1016/j.jseaes.2013.03.005"],["dc.identifier.isi","000320076600007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29574"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","1878-5786"],["dc.relation.issn","1367-9120"],["dc.title","Cretaceous to Cenozoic evolution of the northern Lhasa Terrane and the Early Paleogene development of peneplains at Nam Co, Tibetan Plateau"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","983"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Geology"],["dc.bibliographiccitation.lastpage","986"],["dc.bibliographiccitation.volume","39"],["dc.contributor.author","Hetzel, Ralf"],["dc.contributor.author","Dunkl, Istvan"],["dc.contributor.author","Haider, Vicky L."],["dc.contributor.author","Strobl, Marcus"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.contributor.author","Ding, Lin"],["dc.contributor.author","Frei, Dirk"],["dc.date.accessioned","2018-11-07T08:51:33Z"],["dc.date.available","2018-11-07T08:51:33Z"],["dc.date.issued","2011"],["dc.description.abstract","The uplift history of Tibet is crucial for understanding the geodynamic and paleoclimatologic evolution of Asia; however, it remains controversial whether Tibet attained its high elevation before or after India collided with Asia similar to 50 m.y. ago. Here we use thermochronologic and cosmogenic nuclide data from a large bedrock peneplain in southern Tibet to shed light on the timing of the uplift. The studied peneplain, which was carved into Cretaceous granitoids and Jurassic metasediments, is located in the northern Lhasa block at an altitude of similar to 5300 m. Thermal modeling based on (U-Th)/He ages of apatite and zircon, and apatite fission track data, indicate cooling and exhumation of the granitoids between ca. 70 and ca. 55 Ma, followed by a rapid decline in exhumation rate from similar to 300 m/m.y. to similar to 10 m/m.y. between ca. 55 and ca. 48 Ma. Since then, the peneplain has been a rather stable geomorphic feature, as indicated by low local and catchment-wide erosion rates of 6-11 m/m.y. and 11-16 m/m.y., respectively, which were derived from cosmogenic Be-10 concentrations in bedrock, grus, and stream sediment. The prolonged phase of erosion and planation that ended ca. 50 Ma removed 3-6 km of rock from the peneplain region, likely accomplished by laterally migrating rivers. The lack of equivalent sediments in the northern Lhasa block and the presence of a regional unconformity in the southern Lhasa block indicate that the rivers delivered this material to the ocean. This implies that erosion and peneplanation proceeded at low elevation until India's collision with Asia induced crustal thickening, surface uplift, and long-term preservation of the peneplain."],["dc.identifier.doi","10.1130/G32069.1"],["dc.identifier.isi","000294818700022"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21957"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Geological Soc Amer, Inc"],["dc.relation.issn","0091-7613"],["dc.title","Peneplain formation in southern Tibet predates the India-Asia collision and plateau uplift"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","399"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Terra Nova"],["dc.bibliographiccitation.lastpage","406"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Wotzlaw, Joern F."],["dc.contributor.author","Decou, Audrey"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.contributor.author","Woerner, Gerhard"],["dc.contributor.author","Frei, Dirk"],["dc.date.accessioned","2018-11-07T08:49:16Z"],["dc.date.available","2018-11-07T08:49:16Z"],["dc.date.issued","2011"],["dc.description.abstract","Heavy mineral provenance data presented in this article reinforce evidence for significant late Palaeogene deformation and relief formation along the western margin of the Central Andean Plateau. Late EoceneOligocene onset of molasse-type sedimentation records initial range uplift. Strikingly different basement sources of sediments deposited to the east and west of the Late Palaeogene range indicate that initial relief development was governed by a bivergent thrust system. Significantly higher sediment accumulation rates to the east of the range compared to the west suggest that the generated relief acted already as an effective orographic barrier at that time. Higher precipitation and denudation along the eastern slope facilitated deeper erosion of the trust belt."],["dc.description.sponsorship","German Science Foundation (DFG) [EY 23/14, Wo 362/39]"],["dc.identifier.doi","10.1111/j.1365-3121.2011.01025.x"],["dc.identifier.isi","000297991100007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21418"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","0954-4879"],["dc.title","Jurassic to Palaeogene tectono-magmatic evolution of northern Chile and adjacent Bolivia from detrital zircon U-Pb geochronology and heavy mineral provenance"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","6"],["dc.bibliographiccitation.journal","Journal of South American Earth Sciences"],["dc.bibliographiccitation.lastpage","23"],["dc.bibliographiccitation.volume","45"],["dc.contributor.author","Decou, Audrey"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.contributor.author","Dunkl, Istvan"],["dc.contributor.author","Frei, Dirk"],["dc.contributor.author","Woerner, Gerhard"],["dc.date.accessioned","2018-11-07T09:22:14Z"],["dc.date.available","2018-11-07T09:22:14Z"],["dc.date.issued","2013"],["dc.description.abstract","Timing, amount, and mechanisms of uplift in the Central Andes have been a matter of debate in the last decade. Our study is based on the Cenozoic Moquegua Group deposited in the forearc basin between the Western Cordillera and the Coastal Cordillera in southern Peru from similar to 50 to similar to 4 Ma. The Moquegua Group consists mainly of mud-flat to fluvial siliciclastic sediments with upsection increasing grain size and volcanic intercalations. Detrital zircon U-Pb dating and fission track thermochronology allow us to refine previous sediment provenance models and to constrain the timing of Late Eocene to Early Miocene Andean uplift. Uplift-related provenance and fades changes started around 35 Ma and thus predate major voluminous ignimbrite eruptions that started at similar to 25 by up to 10 Ma. Therefore magmatic addition to the crust cannot be an important driving factor for crustal thickening and uplift at Late Eocene to Early Oligocene time. Changes in subduction regime and the subducting plate geometry are suggested to control the formation of significant relief in the area of the future Western Cordillera which acts as an efficient large-scale drainage divide between Altiplano and forearc from at least 15.5 to 19 degrees S already at similar to 35 Ma. The model integrates the coincidence of (i) onset of provenance change no later than 35 Ma, (ii) drastic decrease in convergence rates at similar to 40, (iii) a flat-subduction period at around similar to 40 to similar to 30 Ma leading to strong interplate coupling, and (iv) strong decrease in volcanic activity between 45 and 30 Ma. (C) 2013 Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","German Science Foundation (DFG) [EY 23/14, Wo 362/39]"],["dc.identifier.doi","10.1016/j.jsames.2013.02.003"],["dc.identifier.isi","000320216900002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29294"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0895-9811"],["dc.title","Late Eocene to Early Miocene Andean uplift inferred from detrital zircon fission track and U-Pb dating of Cenozoic forearc sediments (15-18 degrees S)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]