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《Journal of Chengdu University of Technology(Science & Technology Edition)》 2011-01
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Characteristics and geological implications of heavy minerals in Lower Silurian Xiaoheba Formation sandstones in Southeast Sichuan-West Hunan

WANG Guo-ru1,2,CHEN Hong-de1,2,ZHU Zhi-jun2,3,LIN Liang-biao1,3,FAN Yu3 1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;2.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China;3.College of Geosciences and Measurement Engineering,East China Institue of Technology,Fuzhou 344000,China  
The distribution of heavy minerals in deposits is subjected to the provenance,tectonic uplifting,palaeogeomorphology,paleoclimate and paleoenvironment,etc..So pepole can make the most of the research of heavy minerals in order to analyze the provenance and sedimentary environment.By the relative analysis of heavy minerals,this article illustrates that the provenance direction of the sandstones of the Lower Silurian Xiaoheba Formation in Southeast Sichuan is from southeast to northwest,that is to say,the provenance comes from the southwest section of the Xuefengshan uplift,and the provenance direction of the sandstone of the Lower Silurian Xiaoheba Formation in West Hunan is from northeast to southwest,that is to say,the provenance comes from northeast section of the Xuefengshan uplift.The heavy mineral assemblages indicate that the provenance mainly consists of multi-cycle sedimentary rocks,basic rocks,ultrabasic rocks,and basic-intermediate effusive rocks in Southeast Sichuan,the provenance mainly consists of order sedimentary rocks and a few intermediate effusive rocks formed in the stable tectonic-sedimentary environment.The characteristics and distribution of the pyrite and brown hematite in the Xiaoheba stage indicate that the Xuefengshan uplift and Qianzhong uplift are oxidized environment,while the Nanchuan and Xiushan-Yanhe are two depressions in a reducing environment.
【Fund】: 国家自然科学基金重点资助项目(40739901);; 国家“十五”重大科技攻关项目(2004BA616A-06-02);; 中国石化“十五”重大科技项目(P03044)
【CateGory Index】: P577
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