Geochemistry of Shales from Cambrian Mantou Formation, Northern Anhui Province, China

Lin Hua Sun

doi:10.4028/www.scientific.net/AMR.734-737.352

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 734-737Geochemistry of Shales from Cambrian Mantou...

Geochemistry of Shales from Cambrian Mantou Formation, Northern Anhui Province, China

Abstract:

The Cambrian Mantou Formation shales in northern Anhui Province, China were analyzed for major oxides and trace elements to infer their provenance of the source rocks and their depositional tectonic setting. Ternary plot of Al₂O₃-Zr-TiO₂ and Zr/Sc-Th/Sc diagram suggest that the shales were first order sedimentary of igneous rocks, and then can be used for evaluating their source provenance. Diagrams of (SiO₂/20)- (Na₂O+K₂O)- (MgO+TiO₂+FeO*), TiO₂-Ni, Th-Hf-Co and Hf-La/Th, some ratios of elements (e.g. Co/Th, La/Sc and Zr/Sc), as well as the source SiO₂ contents calculated by Al₂O₃/TiO₂ ratios indicate that intermediate to felsic igneous rocks constitute the source rocks in the provenance.