气候变化领域集成服务门户(CCPortal): Geochemistry Results of Clastic Rocks from the Late Carboniferous Cameng Formation, South Qiangtang, Tibet: Preliminary Constraints for Provenance, Weathering and Tectonic Setting

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DOI	10.1134/S0016702923090033
	Geochemistry Results of Clastic Rocks from the Late Carboniferous Cameng Formation, South Qiangtang, Tibet: Preliminary Constraints for Provenance, Weathering and Tectonic Setting
	Feng, X. L.; Fu, X. G.; Wang, D.; Zeng, S. Q.
发表日期	2023
ISSN	0016-7029
EISSN	1556-1968
起始页码	1364
结束页码	1381
卷号	61 期号:13
英文摘要	Tectonic setting of the Late Carboniferous Cameng Formation in the north of South Qiangtang terranes (SQT) remains controversial. Here, we report new geochemical results for clastic rocks from the Cameng Formation. Our results show that the Index of Compositional Variability (ICV) is greater than 1, indicating these sediments experienced limited recycling and were probably derived from acid to intermediate magmatic rocks. The extent of weathering, with the Index of CIA vary from 67 to 75 (mean = 71), ICV > 1 (mean = 1.25) and the Th/U ratios > 4, is moderate in the source area. These new findings show that the Cameng Formation was most likely deposited in an unstable environment (continental island arc or active continental margin). Combined with other evidence, we further infer that the Early Paleozoic rocks (Pb-206/U-238 ages varying from 438 to 502 Ma) presently exposed in the South Qiangtang terrane are the potential source of the Late Carboniferous depositions in the northern SQT, and were most likely deposited in a forearc basin under the in situ suture model, that is, the southward subduction of the Longmu Co-Shuanghu Tethys Ocean beneath the SQT.
关键词	Clastic rocks geochemistry provenance tectonic setting Late Carboniferous Cameng Formation Tibet
英文关键词	SEDIMENTARY-ROCKS; NORTHERN TIBET; CHINA IMPLICATIONS; CRUSTAL EVOLUTION; SANDSTONES; ARC; ELEMENTS; SHALES; BASIN; DISCRIMINATION
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:001011886700001
来源期刊	GEOCHEMISTRY INTERNATIONAL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283061
作者单位	China Geological Survey; Chengdu Center, China Geological Survey; Ministry of Natural Resources of the People's Republic of China; Southwest Petroleum University
推荐引用方式 GB/T 7714	Feng, X. L.,Fu, X. G.,Wang, D.,et al. Geochemistry Results of Clastic Rocks from the Late Carboniferous Cameng Formation, South Qiangtang, Tibet: Preliminary Constraints for Provenance, Weathering and Tectonic Setting[J],2023,61(13).
APA	Feng, X. L.,Fu, X. G.,Wang, D.,&Zeng, S. Q..(2023).Geochemistry Results of Clastic Rocks from the Late Carboniferous Cameng Formation, South Qiangtang, Tibet: Preliminary Constraints for Provenance, Weathering and Tectonic Setting.GEOCHEMISTRY INTERNATIONAL,61(13).
MLA	Feng, X. L.,et al."Geochemistry Results of Clastic Rocks from the Late Carboniferous Cameng Formation, South Qiangtang, Tibet: Preliminary Constraints for Provenance, Weathering and Tectonic Setting".GEOCHEMISTRY INTERNATIONAL 61.13(2023).