陆相断陷盆地超厚煤层异地堆积的新模式

吴冲龙; 李绍虎; 王根发; 罗映娟

Volume 28 Issue 3

May 2003

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Article Navigation > Earth Science > 2003 > 28(3): 289-296

WU Chong-long, LI Shao-hu, WANG Gen-fa, LUO Ying-juan, 2003. New Evidence and New Model about Allochthonous Accumulation of Extra-Thick Coalbeds in Continental Fault Basin, China. Earth Science, 28(3): 289-296.

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New Evidence and New Model about Allochthonous Accumulation of Extra-Thick Coalbeds in Continental Fault Basin, China

Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2002-07-22
Publish Date: 2003-05-25

Abstract

Abstract

Abundant sedimentary marks of allochthonous genesis are present in the extra-thick coalbeds both in Xianfeng basin and in Xiaolongtan basin in Yunnan. These genesis indicators reveal two new submodels about allochthonous accumulation: Xianfeng submodel and Xiaolongtan submodel. Xianfeng submodel can be reduced to the twice accumulation of lacustrine peaty fan delta and underwater gravity flow, and Xiaolongtan submodel can be reduced to the twice accumulation of lacustrine peaty delta and underwater gravity flow. Integrating these two submodels with Fuxin submodel and Fushun submodel previously established by the authors of this paper, a complete allochthonous-hypautochthony twice lacustrine combination accumulation model for the extra-thick coalbeds in Chinese Mesozoic and Cenozoic intracontinental fault basin is thus established, as shown below: the river distant transport of humic-peat detritus → the sedimentation of peaty fan delta or peaty delta + the allochthonous sedimentation of lacustrine drift peat + the hypautochthony accumulation of local lakeshore swamp peat + the autochthonous accumulation of local lacustrine algae peat + the sedimentation fine detritus, medium-macro-grained detritus or biostromal shelly detritus → the mix and transportation because of flood current or weak storm flow or underwater gravity flow → the mechanical differentiation and resedimentation of peat and inorganic detritus.
- fault basin,
- extra-thick coalbed,
- allochthonous coal,
- coalbed genesis,
- coal accumulation model,
- Mesozoic and Cenozoic,
- China

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References(11)

References

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