Brief Study on the Sedimentary Environment and Coal-Accumulation Pattern of Machala Coalfield in Leiwuqi County of Tibet
详细信息
- 责任者：Xu Bo (College of Earth Science ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Mao Xiaodong
- 刊名：Geology and Mineral Resources of South China
- 出版年：2013
- 卷期：29(2)
- 关键词：沉积环境 ; sedimentary environment ; 聚煤规律 ; coal accumulation regularity ; 西藏 ; Tibet
- 页码：p.162-167
- 图表：illus., 12 refs.
- 分类号：1004
- issnNo：ISSN1007-3701
- isbnNo：CN42-1417/P
摘要
The Changdu Machala coal is the most typical Machala coal-series coal in the scope of the whole Tibet.In this paper,through study and contrast the sedimentary section systemic of the Machala coal mine,mainly from analysis the cross-sectional structure,sequence,sedimentary structures and the characteristics of fossils combination has got that the formation sedimentary environment Machala coal is the neritic environment that development based on transitional environment.Through systematic analysis of the Late Triassic structure-lithofacies palaeogeographic of the Machala coal,we proposed that the formation coal-basin of Machala coal is the continental margin depression coal basin,sedimentary facies is the terrigenous clastic supratidal peat swamp facies.The coal-bearing strata shows the characteristics that gradual thinning from northest to southest.
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