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Late Paleozoic tectonic evolution of the North Tianshan Belt: New structural and geochronological constraints from meta-sedimentary rocks and migmatites in the Harlik Range (NW China)

Abstract : The North Tianshan Belt (NTB) formed by the subduction and accretion of the Junggar Ocean is a key area for reconstructing the Paleozoic tectonic evolution of the southern Central Asian Orogenic Belt (CAOB). Despite numerous studies, the interpretation of the late Paleozoic tectonic evolution of the NTB meets no consensus yet. We conducted field investigations and LA-ICP-MS zircon U-Pb dating on metamorphic rocks from the Julideneng Metamorphic Complex (JMC) in the Harlik Range, which is located between the Turpan-Hami Basin to the south and the East Junggar Belt to the north. The metamorphic rocks are exposed in a NW-SE striking, ~10 km-wide belt and mainly composed of migmatites, garnet-sillimanite mica schists, andalusite schists, and low-grade metasandstones. Detrital zircons from the low-grade meta-sandstone yielded ages of 1400-1250, 1000-850, ~780, ~580, ~490, ~445 and ~425 Ma. Three micaschists contain zircon populations of 2500
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https://hal-cnrs.archives-ouvertes.fr/hal-03510799
Contributor : Dominique Cluzel Connect in order to contact the contributor
Submitted on : Sunday, January 30, 2022 - 9:51:11 AM
Last modification on : Wednesday, February 2, 2022 - 3:31:06 AM

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Xinghua Ni, Bo Wang, Dominique Cluzel, Jiashuo Liu, Zhiyuan He, et al.. Late Paleozoic tectonic evolution of the North Tianshan Belt: New structural and geochronological constraints from meta-sedimentary rocks and migmatites in the Harlik Range (NW China). Journal of Asian Earth Sciences, Elsevier, 2021, 210, pp.104711. ⟨10.1016/j.jseaes.2021.104711⟩. ⟨hal-03510799⟩

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