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《Geological Science and Technology Information》 2010-02
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Signification and Characteristic of the Trace Element Ratios of the Sandstone in Silurian Xiaoheba Formation in Southeastern Sichuan Province and Western Hunan Province

ZHU Zhi-jun1a,2 ,CHEN Hong-de1a,1b,LIN Liang-biao1a,1b,FAN Yu1b(1a.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation; 1b.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China; 2.College of Geosciences and Measurement Engineering,East China Institue of Technology,Fuzhou Jiangxi 344000,China)  
Geochemistry of sandstones is hypersensitive to the stability of the structural evolution of the sedimentary basin,and so it has been an effective way to study the area with complicated background of geological structures. By ICP-MS,this paper detected the trace element contents of 37 sandstone samples collected from Silurian Xiaoheba Formation in southeastern Sichuan Province and western Hunan Province. It also studied the sedimentary environment and the tectonic setting of the source area of the sandstones in the formation by means of trace elements ratios such as V/Ni ,V/(V+Ni) ,Sr/Ba and V/Sc as well as graphic interpretation of sedimentary structure background such as Zr-Th,La-Sc-Th and Th-Sc-Zr/10,and the cross-analysis of multiple parameters. The results showed that this area of Silurian Xiaoheba Formation generally was a detent shallow sea of hypoxia and the Longshan County area near the Xuefengshan uplift was in an oxygen-poor environment. While its source area structure background includes active continental margin ,continental arcuate islands and passive continental margin.
【Fund】: 国家自然科学基金重点项目(40739901);; 国家“十五”重大科技攻关项目(2004BA616A-06-02);; 中国石油化工股份有限公司“十五”重大科技项目(P03044)
【CateGory Index】: P618.13
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