The allochthonous genesis model about the extra-thick and high-quality coalbed in Xianfeng basin, Yunnan Province, China
  • 【摘要】

    An extra-thick high-quality brown coal was found to have accumulated in the Xianfeng basin in Yunnan Pro-vince, China. There are also abundant sedimentary marks of allochthonous genesis in the extra-t... 展开>>An extra-thick high-quality brown coal was found to have accumulated in the Xianfeng basin in Yunnan Pro-vince, China. There are also abundant sedimentary marks of allochthonous genesis in the extra-thick coalbeds. These gen-esis indicators reveal a new submodel about allochthonous accumulation, which is: the long-distance river transportation of detrital plant and inorganic matter→the sedimentation of detrital plant fan delta + the hypautochthony accumulation of local lakeshore swamp peat→the autochthonous accumula-tion of local lacustrine peat + the sedimentation of fine inor-ganic matter→the mixing and transportation by flood current or weak storm flow or underwater gravity flow→the mechan-ical differentiation and their resedimentation between detrital plant and inorganic matter. This submodel can be called "the double accumulation of lacustrine detrital plant fan delta and underwater gravity flow" or "Xianfeng submodel",which supplements the "allochthonous-hypautochthony lacustrine combination accumulation model" of the extra-thick coalbeds. The combination accumulation model is based on the Fuxin submodel and Fushun submodel in the Chinese Mesozoic and Cenozoic intarcontinental fault basin. 收起<<

  • 【作者】

  • 【作者单位】

    Faculty of Earth Resources

  • 【刊期】

    地球科学前沿 2007年1期

  • 【关键词】

    coal for liquefaction  extra-thick coalbed  conti-nental fault basin  coal genesis  allochthonous genesis model,Xianfeng basin  China 

  • 【基金项目】

    This research was supported by the National Natural Science Foundation of China