Xinjiang Petroleum Geology ›› 2005, Vol. 26 ›› Issue (4): 445-449.

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Deep Crust Structure and Petroleum Potential in Yixian-Beipiao Basin, Liaoning Province一And concurrently produced the mystery with large-area species death in terms of rare animal

ZHANG Jing-lian   

  1. Northwest Sub-Institute, Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou, Gansu 730020, China
  • Received:2005-02-21 Online:2005-08-01 Published:2020-11-23

Abstract: It causes domestic geoscientists' great concern that the abundant biological fossil group of Rehe in western Liaoning was found, especially the dinosaur with feather and rare birds were discovered, with various animals' large-area death but keeping remains intact. The comprehensive study of Dongwuzhumuqinqi- Haicheng-Donggou cross-section indicates that there exists a low-velocity layer (vp=5.8-6.0km/s) in deep middle-crust of Yixian-Beipiao basin. According to the distribution of Pb isotope discontinuity zone, it is considered that large-sized oil-gas field exists in the deep of this basin. Also, this paper reveals the mystery of concurrent formation of the rare bio-fossils and large- area death of the species.

Key words: Yixian-Beipiao basin, Yixian formation, rare fossil, species extinction, cross section, middle crust, low-velocity layer, isotope discontinuity zone, petroleum potential

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