气候变化领域集成服务门户(CCPortal): Geochronology and sedimentology of the Huashan Group in the northern Yangtze Block: implications for the initial breakup of the South China

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DOI	10.1007/s00531-020-01890-0
	Geochronology and sedimentology of the Huashan Group in the northern Yangtze Block: implications for the initial breakup of the South China
	Li K.; Deng Q.; Hou M.; Wang J.; Yakymchuk C.; Cui X.; Ren G.; Wang Z.
发表日期	2020
ISSN	14373254
起始页码	2113
结束页码	2131
卷号	109 期号:6
英文摘要	Middle Neoproterozoic sedimentary sequences are widespread in South China and provide crucial insights into the geological evolution of sedimentary basins related to the breakup of the Rodinia supercontinent. The Huashan Group is a key Neoproterozoic stratigraphic unit in the northern Yangtze Block, South China; however, its depositional age and tectonic setting of deposition are debated. Here, we report zircon U–Pb geochronology and Hf isotope data for a tuff from the second section of the Hongshansi Formation near the bottom of the Huashan Group. Zircon U–Pb geochronology yields a 206Pb/208U age of 836 ± 4 Ma (MSWD = 0.74, n = 29). Zircon Hf isotope ratios have εHf(t) values of + 3.1 to + 5.4 and TDM2 ages range from ca. 1.5 to 1.4 Ga, which indicates that juvenile materials derived from the mantle were involved in their host magmas. Combined with previous research, the Huashan Group was deposited from ca. 830 to 800 Ma from bottom to top, and it contains alluvial fan, fan delta, and semideep to deep lacustrine facies, which represent early sedimentation into a continental rift basin. Rifting and basin formation began at ca. 830 Ma in South China, which is coeval with the initial breakup of the Adelaidean Rift in southeastern Australia. The Huashan Group was deposited during the first and the second episodes of a superplume associated with the breakup of the Rodinia supercontinent. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Huashan group; Neoproterozoic; Rift basin; Rodinia supercontinent; South China; Tuff
语种	英语
scopus关键词	basin evolution; continental breakup; deposition; geochronology; lithostratigraphy; Proterozoic; rifting; Rodinia; sedimentary basin; sedimentary sequence; sedimentology; tectonic setting; Adelaide Geosyncline; Australia; China; South Australia; Yangtze Platform
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147643
作者单位	Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, 610059, China; Chengdu Center, China Geological Survey, Chengdu, 610081, China; Key Laboratory for Sedimentary Basin and Oil and Gas Resources, Ministry of Natural Resources, Chengdu, 610081, China; School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, China; Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, ON N2L 3G1, Canada
推荐引用方式 GB/T 7714	Li K.,Deng Q.,Hou M.,et al. Geochronology and sedimentology of the Huashan Group in the northern Yangtze Block: implications for the initial breakup of the South China[J],2020,109(6).
APA	Li K..,Deng Q..,Hou M..,Wang J..,Yakymchuk C..,...&Wang Z..(2020).Geochronology and sedimentology of the Huashan Group in the northern Yangtze Block: implications for the initial breakup of the South China.International Journal of Earth Sciences,109(6).
MLA	Li K.,et al."Geochronology and sedimentology of the Huashan Group in the northern Yangtze Block: implications for the initial breakup of the South China".International Journal of Earth Sciences 109.6(2020).