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Application of Geochemistry in Provenance and Depositional Setting Analysis

MAO Guang-zhou1,2,LIU Chi-yang2 (1.Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals,School of Geological Science and Engineering,Shandong University of Science and Technology,Qingdao 266590, Shandong,China;2.State Key Laboratory of Continental Dynamics,Institute of Petroliferous Basin, Northwest University,Xi'an 710069,Shaanxi,China)  
Provenance analysis is indispensable to basin and palaeogeography analysis,and geochemistry plays an important role in provenance and depositional setting analysis.The related literatures about the application of geochemistry in provenance and depositional setting analysis were studied;major element analysis,rare earth element-trace element analysis and isotope analyses such as fission track,K-Ar,Ar-Ar,Rb-Sr,Sm-Nd,U-Pb,Re-Os,S,O,Si,etc.were discussed,and the advantage and disadvantage of the above methods were analyzed.The results showed that major element analysis and rare earth element-trace element analysis had good application effect on material composition,tectonic setting,weathering intensity,compositional maturity and oxidation-reduction condition of provenance;the isotope analyses had their own advantages in different studies,and all had good application effect.There were many factors on chemical composition of rocks,especially for sedimentary rock,it was easily affected by exogenous effect;geochemistry methods in provenance and depositional setting analysis were few;the research on regional geology was inadequate.Therefore,it is suggested that the factors on chemical composition of clastic sediment should be fully studied when geochemistry methods are used to analyze the provenance and depositional setting,and multiple methods can be synthetically used and the study on regional geology should be paid more attention to.
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