Title: Analysis on sedimentary characteristics and environments of Paleogene in Mengyin basin,southwestern Shandong province
Abstract: Researches on paleogene of MengYin Basin were mainly concentrated in stratigraphic division and correlation,and few in a sedimentary environment. The sedimentary characteristics and environments of paleogene are studied using the methods of sedimentology and geochemistry. The results show that: ChangLu formation in Mengyin basin( E12 + 3-E21ch) is developed with the fluvial and shore-shallow lacustrine facies,and Chang-1 member is mainly developed with fluvial deposits; member Chang-2 is with shore-shallow lacustrine facies with swamping coal-bearing clay deposits and Chang-3 member is with flooding lakeshore deposit. The geochemical indicators such as w( V) / w( V + Ni),w( Sr) / w( Ba),w( Mg) / w( Ca) show that the deposits of ChangLu formation was mainly under a humid climate and a freshwater environment,existing small fluctuations. There was a significant negative correlation between paleosalinity and water depth,as Mengyin basin was a closed intermountain basin during Paleogene. The Zhujiagou formation( E21zh) belongs to the sediments of piedmont alluvial fan with orographic uplift after ChangLu period. The evolution of Mengyin basin during Paleogene was controlled by the dextral strike-slip of the Yishu fault and Lanliao fault,with the subduction of the Pacific plate.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 2
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