Sedimentary provenance studies using magnetic parameters: a case study of Chuan river section at the upper reaches of the Yangtze River

摘要：

Through systematic sampling on Chuan River section at the upper reaches of the Yangtze River, providing magnetic measurements in order to carry out the magnetic diagnosis method of quantitative analysis on the composition of sedimentary provenance in the Yangtze River and its tributaries, we have analyzed magnetic characteristics of these sediments, and further achieved sedimentary provenance study on magnetic materials. The results show that: (1) In Chuan River section at the upper reaches of the Yangtze River, the inflow of tributaries has a little contribution on magnetic materials of the main streams sediments. The contribution of Min River, Tuo River, Chishui River, Jialing River and Wu River accounts for 1.7％, 6.8％, 6.6％, 10.5％ and 9.9％. (2) For the Yibin section of the Yangtze River, in contrast to Min River, the inflow of Jinsha River shows a greater contribution on magnetic minerals of the main streams sediments. The contribution of Jinsha River and Min River is respectively 98.3％ and 1.7％. (3) Comparing Chuan River section and Jinsha River section of the Yangtze River with the main tributaries, we find that these sedimentary samples in Chuan River section are quite similar to those of Jinsha River section on magnetic parameters. This result implies that magnetic materials of sediments in Chuan River section mainly derive from the upper reaches of Jinsha River.(4) The results suggest that using magnetic diagnosis method of composition on the magnetic materials of sediments we can have a marked effect at constraining sedimentary provenance in river systems, provenance of which is relatively simple.

关键词： Chuan River section of the Yangtze River magnetic characteristics of sediments magnetic diagnosis model provenance

作者: Yufen Zhang Lingqin Yan Changan Li Yong Zhang Lei Shao

作者单位: Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074,China Institute of Geophysics and Geomatics, China University of Geosciences,Wuhan 430074, China Key Laboratory of Biogeology and Environmental Geology of Ministry of Education (China University of Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China Faculty of Earth Science,China University ofGeosciences, Wuhan 430074, China

会议类型: 国际会议

会议名称: The 4th International Conference on Environmental and Engineering Geophysics(第四届环境与工程地球物理国际会议 ICEEG2010)

会议地点: 成都

会议语种:英文

页码: 832-839

在线出版日期: 2010-06-14（万方平台首次上网日期，不代表论文的发表时间）