P–T path, zircon U–Pb ages and tectonic implications of Devonian pelitic granulites in the southern Chinese Altay orogen,Journal of Asian Earth Sciences

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P–T path, zircon U–Pb ages and tectonic implications of Devonian pelitic granulites in the southern Chinese Altay orogen
Journal of Asian Earth Sciences ( IF 3 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.jseaes.2020.104554
Zhao Liu , Laixi Tong , Omar Bartoli , Chao Li , Yi–Gang Xu , Zheng Zhong

Abstract The Chinese Altay orogen is an important part of the giant Central Asian Orogenic Belt. However, its tectono–metamorphic evolution is still a matter of debate. Here, we report Devonian pelitic granulites at the Wuqiagou area in the southern Chinese Altay orogen. They are characterized by an assemblage of garnet + orthopyroxene + cordierite ± spinel + biotite + plagioclase ± K–feldspar + quartz + Fe–Ti oxides. Based on petrographic features and P–T estimates, together with phase equilibrium modeling in the NCKFMASHTO system, three metamorphic stages can be distinguished as follows: (1) pre–peak prograde (M1) stage, with small biotite–plagioclase– or spinel–bearing assemblages preserved as inclusions in garnets and P–T conditions of

更新日期：2020-11-01

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