Oil & Gas Geology ›› 2002, Vol. 23 ›› Issue (4): 392-396.doi: 10.11743/ogg20020419

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LATE PERMIAN SPOROPOLLEN ASSEMBLAGE FROM LUCAOGOU FORMATION IN SANTANGHU BASIN

Yin Fengjuan, Liu Hongfu, Hua Hong   

  1. Department of Geology, Northwest University, Xi'an, Shaanxi
  • Received:2002-04-29 Online:2002-12-25 Published:2012-01-16

Abstract:

Lucaogou Formation in Santanghu basin consists of a set of shallow lacustrine-semi lacustrine deposits mainly in gray mudstone. Abundant spores and pollen grains including 28 species of 26 genera are recognized in the mudstone. It is indicated by studying that Lucaogou Formation sporopollen assemblage is characterized by the dominance of Gymnospermous Polle grains and a small amount of Pteridophyte spores. Cordaitina, Hamiapollenites, Protohaploxypinus,Striatopdocarpites, Striatoabieites and Alisporites are dominant in the mudstone. It is believed that Lucaogou Formation belongs to the early late Permian in age based on its feature of sporopollen assemblage and comparison. Sporopollen colors may reflect then ancient temperature between 60℃~110℃ and evolution of organic material in low maturation stage.

Key words: Sporopollen, organic material, maturation, Late Permian, Santanghu basin

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