| 基于因子分析的江汉盆地第四纪沉积物源讨论 |
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| 引用本文： | 袁胜元,李长安.基于因子分析的江汉盆地第四纪沉积物源讨论[J].现代地质,2014,28(5):980-985. |
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| 作者姓名： | 袁胜元 李长安 |
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| 作者单位： | (1.许昌学院 城市与环境学院, 河南 许昌461000; 2.中国地质大学(武汉)地球科学学院，湖北 武汉430074) |
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| 基金项目： | 国家自然科学基金项目(40971008，40771213)；河南省科技攻关项目(122102310421)；河南省教育厅科技指导项目(13B170241)；河南省许昌市2014年科技计划项目(1405027)。 |
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| 摘 要： | 选择江汉盆地中心位置的ZL钻孔，利用ICP-MS方法，对钻孔岩心微量元素组成进行了R因子分析，研究了新近纪以来江汉盆地沉积物物源的变化。结果表明：2.77~2.68 Ma B.P.期间，江汉盆地沉积物微量元素组成表达了一种近源为主的沉积过程；2.68~2.23 Ma B.P.期间，江汉盆地碎屑沉积受长英质类物源供给影响较为明显；2.23~1.25 Ma B.P.时期及1.25 Ma B.P.以来的沉积物微量元素特征都表现出受铁镁质岩体影响的特征，推测这一阶段有较大面积基性岩体分布的长江上游流域可能已经成为江汉盆地的物源供给者。
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| 关 键 词： | 江汉盆地 物源 第四纪 因子分析 |
Study on Sediment Provenances in Jianghan Basin since Quaternary Based on Factorial Analysis |
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| YUAN Sheng-yuan,LI Chang-an.Study on Sediment Provenances in Jianghan Basin since Quaternary Based on Factorial Analysis[J].Geoscience——Journal of Graduate School,China University of Geosciences,2014,28(5):980-985. |
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| Authors: | YUAN Sheng-yuan LI Chang-an |
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| Institution: | (1.College of Urban Planning & Enviroment Science, Xuchang University, Xuchang，Henan461000,China； 2.School of Earth Sciences, China University of Geosciences, Wuhan, Hubei430074, China) |
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| Abstract: | Taking drillinghole ZL located at the center of Jianghan Basin as an example, with method of ICP-MS,the R factor of trace element compositions of cores from the hole is analyzed to reveal sediment sources’ changes in Jianghan Basin since Quaternary in this paper. The results show that during 2.77 to 2.68 Ma B.P.,the deposition process is mainly near source according to trace element compositions of sediments in Jianghan Basin; during 2.68 to 2.23 Ma B.P.the clastic deposition in Jianghan Basin is obviously affected by felsic; during 2.23 to 1.25 Ma B.P. and since 1.25 Ma BP.the trace element of sediments is affected by Fe-Mg rocks, and it is indicated that the upper reaches of the Yangtze River which has a large-scale basic rocks distribution is the source provider of Jianghan Basin. |
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| Keywords: | Jianghan Basin sedimental provenance Quaternary factor analysis |
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