Eocene uplift and exhumation in Gangdese area: Evidence from zircon U-Pb ages and Al-in-biotite geobarometer

作者：Aorigele Zhou,Ju-xing Tang,Ming Zheng

摘要：1.Objective The surface uplift history of the Tibetan Plateau is a hot topic in geosciences.The evidence from stratigraphy,geochronology of potassium-rich lava and studies of apatite fission tracks indicated that the Lhasa and southern Qiangtang terranes were at or close to their modern elevation since 40 Ma and formed the proto-Tibetan Plateau(Wang CS et al.,2008).However,uplifting mechanism of the southern margin of the proto-Tibetan Plateau is not well understood(Wang CS et al.,2008;Fig.1a).Lhasa-Woka ductile shear zone(LWDS),the eastern part of Xietongmen-Lhasa-Woka ductile shear zone,is a large-scale E-trending belt in Gangdese and is located in the southern margin of the proto-Tibetan Plateau.LWDS characterized by typical ductile shear zone at the easternmost part,whereas crop out as southward thrusting fault system at the western part,namely the Jiama-Qulong ore district and adjacent area(Fig.1b).

发文机构：Ministry of Natural Resources Key Laboratory of Metallogeny and Mineral Assessment

关键词：UPLIFTTIBETANeastern

分类号： P53[天文地球—古生物学与地层学]