Provenance Study of Fe–Ti Oxide Minerals in the Quaternary Sediments in Yichang Area and Its Implication of Formation Time of the Yangtze Three Gorges, China

Provenance Study of Fe–Ti Oxide Minerals in the Quaternary Sediments in Yichang Area and Its Implication of Formation Time of the Yangtze Three Gorges, China
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This study is supported by the Project of the National Natural Science Foundation of China (Grant No. 41572093, 41072083, 40602011), the Open Foundation of Shangdong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral, the Cultivating Program of Young and Middle-aged Backbone Teachers of Chengdu University of Technology. The Authors thank Doctor Feng Mingshi in State Key Laboratory of Oil and Gas reservoir Geology and exploitation of Chengdu University of Technology for his instructive discussions and help for sample testing. The authors would like to thank Enago (www.enago.cn) for the English language review.

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    The Three Gorges are considered to be critical to understand the formation of Yangtze River. Recent research results suggest that the Yangtze Three Gorges was created during the Quaternary but the exact time is debatable. Fe–Ti oxide minerals are seldom used to study sediment provenance, expecially using scanning electron microscopy (SEM), and energy dispersive spectrometer (EDS). In this study, the provenance of Quaternary sediments in Yichang area, which is located to the east of the Yangtze Three Gorges, was investigated by using SEM and EDS to research Fe–Ti oxides. The Panzhihua vanadium titanomagnetite and Emeishan basalt outcrop are located to the west of the Three Gorges. Further, the materials from them are observed in the Quaternary sediments of Yichang area. Fe–Ti oxide minerals from the Huangling granite are observed in the Yunchi and Shanxiyao Formations, which were formed before 0.75 Ma B.P., whereas Fe–Ti oxide minerals from the Huangling granite, Panzhihua vanadium titanomagnetite, and Emeishan basalt are observed in the riverbed and fifth-terrace sediments of the Yangtze River, which were formed after 0.73 Ma B.P.. Thus, we can infer that the Three Gorges formed after the deposition of the Shanxi Formation and before the fifth-terrace; i.e., 0.75–0.73 Ma B.P..

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XIANG Fang, DU Wen, HUANG Henxu, KANG Dongya, ZHU Hongbo, FENG Qin.2018. Provenance Study of Fe–Ti Oxide Minerals in the Quaternary Sediments in Yichang Area and Its Implication of Formation Time of the Yangtze Three Gorges, China[J]. ACTA GEOLOGICA SINICA(English edition),92(4):1598~1608

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  • 收稿日期:2017-02-15
  • 最后修改日期:2017-08-10
  • 在线发布日期: 2018-08-21
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