Oil & Gas Geology ›› 2005, Vol. 26 ›› Issue (2): 237-241.doi: 10.11743/ogg20050217

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Geochemical characteristics of Cretaceous sandstone-mudstone and its importance to tectonics in Zhoukou basin

Gao Changlin, Huang Zeguang, Zhang Yuzhen   

  1. Wuxi Branch of Exploration and Production Research Institute, SINOPEC, Wuxi, Jiangsu
  • Received:2005-03-25 Online:2005-04-25 Published:2012-01-16

Abstract:

The prototype of Zhoukou Cretaceous basin should be of foredeep basin. In the Q-F-L graph, the plotted points of quartz, feldspar and lithoclast contents of Cretaceous sandstone-mudstone cored from wells are mainly located in foreland basin area. While the plotted points of the major compounds in Cretaceous sand-shale are mainly located in active continental margin area. The total contents of rare earth elements and the ratio of light/heavy rare earth elements change insignificantly, similar to the characteristics of sandstone and siltstone in Russian Platform. Therefore, it is believed that Cretaceous sediments in Zhoukou basin might have been sourced from Qinling-Dabie orogenic zone and the lithogenous materials come from the source area might have been thoroughly blended.

Key words: Zhoukou basin, piedmont depression, geochemistry, major compound, rare-earth element

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