气候变化领域集成服务门户(CCPortal): The Mesozoic-Cenozoic tectonic settings, paleogeography and evaporitic sedimentation of Tethyan blocks within China: Implications for potash formation

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DOI	10.1016/j.oregeorev.2018.09.002
	The Mesozoic-Cenozoic tectonic settings, paleogeography and evaporitic sedimentation of Tethyan blocks within China: Implications for potash formation
	Liu, Chenglin; Wang, Licheng; Yan, Maodu; Zhao, Yanjun; Cao, Yangtong; Fang, Xiaomin; Shen, Lijian; Wu, Chihua; Lv, Fenglin; Ding, Ting
通讯作者	Liu, CL (通讯作者)
发表日期	2018
ISSN	0169-1368
EISSN	1872-7360
起始页码	406
结束页码	425
卷号	102
英文摘要	Potash deposits are common in the Mesozoic-Cenozoic Tethyan domain, which features the giant potash deposits in the Late Jurassic Central Asian Basin and the Late Cretaceous Khorat Basin of Thailand-Laos. Widespread evaporitic sequences from these intervals have been found in some marine and transitional basins within the Chinese continental blocks, such as the Yangtze, Simao and Tarim blocks, in which, only one small-scale potash deposit had been found in the Late Cretaceous Simao Basin. These evaporites are commonly characterized by depositional cycles that are more frequent than those of other potash basins around the world. It remains debated whether large or giant potash deposits could be formed in Chinese blocks of Tethyan domain, and if so, what mechanism was responsible for the potash formation. To address these issues, we comprehensively review the Meso-Cenozoic drift history and collision dynamics of these Chinese blocks and summarize the formation mechanism, depositional characteristics, and paleoclimate of the evaporite basins in these blocks. These blocks drifted from the Southern Hemisphere and collided and welded together in the beginning of the late Permian in the Northern Hemisphere. The collisions often commenced in the east and gradually spread to the west of these blocks, resulting in: (1) westward seawater retreat; (2) differential topographic uplift with high topography in the east and low topography in the west and (3) increasingly closed depositional environments in these basins. In addition, these collisions often exerted nearly N-S-oriented principal compressive stress, which resulted in nearly E-W-oriented extension. These forces induced a series of faulted-bounded subsidence belts with N-S-striking extensional sub-basins arranged in an E-W-oriented chain in these blocks. In this chain-like sub-basins system, as sea level rose and seawater flowed from west to east, the western sub-basins proximal to the open sea would have precipitated calcium carbonates and calcium sulfates, resulting in a high degree of concentration by the time the brines reached the distal end, i.e. eastern sub-basins. Ultimately, potash minerals were commonly deposited in the easternmost sub-basins. Based on the above model of potash formation, we predict that potash deposits may be formed in certain sub-basins in the eastern part of these basins in Chinese Tethyan blocks, which maybe lay a theoretical foundation for China's future exploration of potash deposits.
关键词	SEA-SURFACE TEMPERATURES ARC/BACK-ARC ASSEMBLAGES NORTH QILIAN MOUNTAINS LANPING-SIMAO BASIN SOUTH CHINA SICHUAN BASIN NW CHINA PALEOMAGNETIC CONSTRAINTS ISOTOPIC CHARACTERISTICS MENGYEJING FORMATION
英文关键词	Potash formation; Evaporite basin; Chinese continental block; Tectonic setting; Eastern Tethys; Mesozoic-Cenozoic
语种	英语
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:000453493100020
来源期刊	ORE GEOLOGY REVIEWS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259173
推荐引用方式 GB/T 7714	Liu, Chenglin,Wang, Licheng,Yan, Maodu,et al. The Mesozoic-Cenozoic tectonic settings, paleogeography and evaporitic sedimentation of Tethyan blocks within China: Implications for potash formation[J]. 中国科学院青藏高原研究所,2018,102.
APA	Liu, Chenglin.,Wang, Licheng.,Yan, Maodu.,Zhao, Yanjun.,Cao, Yangtong.,...&Ding, Ting.(2018).The Mesozoic-Cenozoic tectonic settings, paleogeography and evaporitic sedimentation of Tethyan blocks within China: Implications for potash formation.ORE GEOLOGY REVIEWS,102.
MLA	Liu, Chenglin,et al."The Mesozoic-Cenozoic tectonic settings, paleogeography and evaporitic sedimentation of Tethyan blocks within China: Implications for potash formation".ORE GEOLOGY REVIEWS 102(2018).