Xinjiang Petroleum Geology ›› 2008, Vol. 29 ›› Issue (2): 155-158.

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Hydrothermal Activities vs Coal Origin in Ruqigou Coal Mine

ZHANG Hu-quan1, ZHANG Jing-lian1, WEI Ping-sheng1, CHEN Qi-lin1, WU Wu-tong2   

  1. 1. Northwest Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou, Gansu 730020, China;
    2. Gansu Coal Geological Institute, Lanzhou, Gansu 730020, China
  • Received:2007-04-17 Published:2020-08-17

Abstract: The hydrothermal activities including quartz vein (silication), dolomitization, chloritization, illitization and pyritization and the widely distributed basalt in Ruqigou coal mine in western margin of Ordos basin indicate that there exist mantle fluids in the basin since it is in rifted environment. And the geoscience transect reveals that there is a low-velocity and high-conduction layer in the deep crust of the basin, which contains abundant Na+ , K+ , Mg2 + and Hydrocarbons. These constitute the main components of coal and form highmetamorphic anthracitic coal. It is concluded that coal is not only formed by plants, but also by deep mantle fluids.

Key words: Ordos basin, coal, origin, carbon accumulation, mid-crust, low-velocity and high-conduction layer

CLC Number: