The allochthonous genesis model about the extra-thick and high-quality coalbed in Xianfeng basin, Yunnan Province, China |
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| Authors: | Wu Chonglong Li Shaohu Wang Genfa Liu Gang and Kong Chunfang |
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| Institution: | (1) Faculty of Earth Resources, China University of Geosciences, Wuhan, 430074, China |
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| Abstract: | An extra-thick high-quality brown coal was found to have accumulated in the Xianfeng basin in Yunnan Province, China. There
are also abundant sedimentary marks of allochthonous genesis in the extra-thick coalbeds. These genesis 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 accumulation of local lacustrine peat + the sedimentation of fine inorganic matter → the mixing and transportation
by flood current or weak storm flow or underwater gravity flow → the mechanical 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.
Translated from Acta Sedimentologica Sinica, 2006, 24(1): 1–9 译自: 沉积学报] |
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| Keywords: | coal for liquefaction extra-thick coalbed continental fault basin coal genesis allochthonous genesis model Xianfeng basin China |
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