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The Kebao coal basin is located at the middle segment of the Xiaojiang fault zone in the central part of Yunnan Province. The coal-bearing strata of Tertiary age are made up of alluvial fan-lacustrine-swamp genetic sequences. Sinistral strike-slip motion of the N-S trending fault zone has created a locally transtensional or transpres sional tectonic environment, giving rise to the relative movement of fault blocks in the basement, and the development of a strike-slip coal basin at the surface. Based on de tailed sedimentary-structural analyses, the paper proposes geodynamic models for the coal basin formation and its deformation.
The coal-bearing strata of Tertiary age are made up of alluvial fan-lacustrine-swamp genetic sequences. The Kebao coal basin is located at the middle segment of the Xiaojiang fault zone in the central part of Yunnan Province. the NS trending fault zone has created a locally transtensional or transpresional tectonic environment, giving rise to relative movement of fault blocks in the basement, and the development of a strike-slip coal basin at the surface. Based on de tailed sedimentary-structural analyses, the paper ge geodynamic models for the coal basin formation and its deformation.