气候变化领域集成服务门户(CCPortal): Provenance of late Paleozoic strata in the Yili Basin: Implications for tectonic evolution of the South Tianshan orogenic belt

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DOI	10.1130/B31588.
	Provenance of late Paleozoic strata in the Yili Basin: Implications for tectonic evolution of the South Tianshan orogenic belt
	Huang H.; Cawood P.A.; Ni S.; Hou M.; Shi Z.; Hu X.
发表日期	2018
ISSN	167606
起始页码	952
结束页码	974
卷号	130 期号:5
英文摘要	The Yili Basin in NW China preserves a late Paleozoic volcano-sedimentary succession, the provenance of which helps to constrain the tectonic evolution of the South Tianshan orogenic belt. U-Pb ages and trace-element and Hf isotopic compositions of detrital zircons from the Late Devonian to earliest early Carboniferous strata in the Yili Basin suggest that the unit contains detritus mainly derived from basement rocks and contemporaneous arc-related volcanic rocks. The age of the unconformable contact between the Dongtujinhe Formation and underlying arc-related volcanic rocks is constrained to ca. 310 Ma. This age is consistent with published data for tectonic exhumation of high- to ultrahigh-pressure ([U]HP) metamorphic rocks from the northern margin of the South Tianshan orogenic belt. Zircon U-Pb ages from the sedimentary rocks, including clasts in conglomerate, indicate that detritus of the Dongtujinhe Formation was derived from multiple sources related to uplift and erosion of the southern Yili-Central Tianshan block. The presence of abundant eclogite clasts in the conglomerate of the Keguqinshan Formation indicates that (U)HP metamorphic rocks in the South Tianshan orogenic belt were exposed and supplied detritus to the southern Yili Bassin at ca. 300 Ma. The early Middle Permian clastic rocks are characterized by Early Permian detrital zircons with a single peak at 278 Ma, derived from the postcollision magmatic rocks. During the Late Permian, input of detritus from old volcanic-sedimentary rocks and basement progressively increased. Integration of the provenance data from late Paleozoic strata in the Yili Basin with the time-equivalent northern Tarim and South Tianshan regions provides a record of the northward subduction of the South Tianshan oceanic crust beneath the Yili-Central Tianshan block in the Late Devonian to late Carboniferous (380–310 Ma), followed by continent-continent collision and final amal-gamation at ca. 310–300 Ma, with postcollisional extension in the Permian. © 2017 The Authors.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185080
作者单位	State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, 610059, China; Department of Earth and Environmental Sciences, University of St. Andrews, St. Andrews, KY16 9AL, United Kingdom; School of Earth, Atmosphere & Environment, Monash University, Melbourne, VIC 3800, Australia; College of Earth Sciences, Chengdu University of Technology, Chengdu, 610059, China
推荐引用方式 GB/T 7714	Huang H.,Cawood P.A.,Ni S.,et al. Provenance of late Paleozoic strata in the Yili Basin: Implications for tectonic evolution of the South Tianshan orogenic belt[J],2018,130(5).
APA	Huang H.,Cawood P.A.,Ni S.,Hou M.,Shi Z.,&Hu X..(2018).Provenance of late Paleozoic strata in the Yili Basin: Implications for tectonic evolution of the South Tianshan orogenic belt.Bulletin of the Geological Society of America,130(5).
MLA	Huang H.,et al."Provenance of late Paleozoic strata in the Yili Basin: Implications for tectonic evolution of the South Tianshan orogenic belt".Bulletin of the Geological Society of America 130.5(2018).