气候变化领域集成服务门户(CCPortal): Jurassic-cretaceous exhumation history of the Northern Qaidam Basin and its implications for Northeastern Qinghai-Tibet plateau tectonism: evidences from zircon fission track thermochronology

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DOI	10.1080/00206814.2024.2303656
	Jurassic-cretaceous exhumation history of the Northern Qaidam Basin and its implications for Northeastern Qinghai-Tibet plateau tectonism: evidences from zircon fission track thermochronology
	Feng, Zirui; Yuan, Wanming; Zhao, Zhidan; Dong, Guochen; Li, Xiaowei; Sun, Wenli; Yang, Li; Hong, Shujiong; Zhao, Mingming; Hu, Caixia; Li, Shiyu
发表日期	2024
ISSN	0020-6814
EISSN	1938-2839
英文摘要	Reconstructing the growth model of the Northeastern Qinghai-Tibet Plateau is of significant importance in understanding its tectonic evolution through time. We present 20 new zircon fission track data on samples collected from the Chakabeishan-Shaliuquan district in the North Qaidam Tectonic Belt (NQTB) to constrain its Mesozoic mineralization and exhumation history. Sample ages and characteristics are differentiated by regional thrust fault systems. The mineralized pegmatite ages with high U concentrations can be divided into two groups of 170-168 Ma and 149-137 Ma, recording exhumation and hydrothermal mineralization events, with average cooling and exhumation rates of 0.074 mm/y and 2.305 degrees C/Ma, respectively. Two ZFT ages groups characterized by low U concentrations at the deposit periphery of 125-106 Ma and 99-80 Ma, respectively, are associated with accelerated cooling and exhumation, with mean values of 7.662 degrees C/Ma and 0.245 mm/y. We suggest that the NQTB was positioned in the high background thermal field in the Triassic, and subsequent tectonic extension resulted in the unroofing, cooling and mineralization of the region. The transition from extensional to contractional deformation in the Cretaceous tectonic setting has reactivated regional thrust fault systems and reset the Jurassic ZFT ages, and this exhumation event was influenced by the closure of the Middle-Tethys and Mongol-Okhotsk Oceans, consistent with the double-sided subduction model.
关键词	Exhumation zircon fission track Qaidam basin
英文关键词	CENOZOIC COOLING HISTORY; EASTERN KUNLUN RANGE; U-PB GEOCHRONOLOGY; QILIAN SHAN; NW CHINA; CONTINENTAL DEFORMATION; GEOLOGIC EVOLUTION; THRUST BELT; APATITE; MARGIN
WOS研究方向	Geology
WOS记录号	WOS:001144552100001
来源期刊	INTERNATIONAL GEOLOGY REVIEW
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283322
作者单位	China University of Geosciences - Beijing; China University of Geosciences - Beijing; China University of Geosciences - Beijing
推荐引用方式 GB/T 7714	Feng, Zirui,Yuan, Wanming,Zhao, Zhidan,et al. Jurassic-cretaceous exhumation history of the Northern Qaidam Basin and its implications for Northeastern Qinghai-Tibet plateau tectonism: evidences from zircon fission track thermochronology[J],2024.
APA	Feng, Zirui.,Yuan, Wanming.,Zhao, Zhidan.,Dong, Guochen.,Li, Xiaowei.,...&Li, Shiyu.(2024).Jurassic-cretaceous exhumation history of the Northern Qaidam Basin and its implications for Northeastern Qinghai-Tibet plateau tectonism: evidences from zircon fission track thermochronology.INTERNATIONAL GEOLOGY REVIEW.
MLA	Feng, Zirui,et al."Jurassic-cretaceous exhumation history of the Northern Qaidam Basin and its implications for Northeastern Qinghai-Tibet plateau tectonism: evidences from zircon fission track thermochronology".INTERNATIONAL GEOLOGY REVIEW (2024).