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Geoscience ›› 2011, Vol. 25 ›› Issue (5): 987-994.

• palaeontology • Previous Articles     Next Articles

Nonfusulinid Foraminiferal Fauna from the Permian Chihsia Formation, Northwestern Sichuan Basin

 ZHANG  Zhou-1, ZHANG  Ting-Shan-1, 2 , LA  Guang-Zhi-1   

  1. 1School of Resources and Environment, Southwest Petroleum University, Chengdu,Sichuan610500, China; 2State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu,Sichuan610500,China
  • Received:2011-04-22 Revised:2011-08-18 Online:2011-10-26 Published:2011-11-03

Abstract:

The Permian nonfusulinid foraminifers of the Chihsia Formation are collected from Wangjiagou section in Wangcang County, Northwestern Sichuan Basin. The Chihsia Formation of Wangjiagou section is a suit of mediumbedded to thickbedded limestones, with thickness of about 108 meters. Based on the systematic study to the Chihsia Formation, 27 species of 14 genera (including conformis species and subspecies) of the nonfusulinid foraminiferal fauna have been recognized in the Wangjiagou section. The Globivalvulina assemblage is suggested as indicative fauna for recognition of the Permian largest transgressive period. The result of this study not only enriches the fossil database of Sichuan Basin, but also provides more palaeontological evidences for stratigraphic correlation in South China.

Key words: nonfusulinid foraminifer, Chihsia Formation, Permian, Wangjiagou section, Northwestern Sichuan Basin