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XU Ya-ling, BA Jin, WANG Qin-yan, ZHANG Lu, WANG Xin-yu, CHEN Neng-song. 2011: LA-ICP-MS zircon U-Pb age of the Halihadeshan granite-gneiss in northeastern Dulan, Qinghai, and its tectonic implications. Geological Bulletin of China, 30(7): 1037-1042. DOI: 10.12097/gbc.20110705
Citation: XU Ya-ling, BA Jin, WANG Qin-yan, ZHANG Lu, WANG Xin-yu, CHEN Neng-song. 2011: LA-ICP-MS zircon U-Pb age of the Halihadeshan granite-gneiss in northeastern Dulan, Qinghai, and its tectonic implications. Geological Bulletin of China, 30(7): 1037-1042. DOI: 10.12097/gbc.20110705
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LA-ICP-MS zircon U-Pb age of the Halihadeshan granite-gneiss in northeastern Dulan, Qinghai, and its tectonic implications

  • Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China;2. Guangxi Institute of Geological Survey and Exploration, Nanning 530023, Guangxi, China;3. State Key Laboratory of Geological Processes and Mineral Resources/China University of Geosciences,Wuhan 430074, Hubei, China

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  • The Halihadeshan granite-gneiss in northeast Dulan County of Qinghai Province has a protolith of S-type granites. LA-ICP-MS dating of 20 grains of zircon from this gneiss shows that the protolith magma was composed of Mesoproterozoic and Neoproterozoic materials, and that the protolith magma was emplaced and crystallized at ~950 Ma. The correct judgment as to whether the metamorphic wall rocks of the Halihadeshan granite-gneiss belong to Dakendaban Group of Quanji massif seems to be the key to understanding the tectonic evolution relationship between the Quanji massif and Qaidam block in Neoproterozoic period.
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