| 新疆托克逊煤田侏罗系成煤环境及沉积特征分析 |
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| 关键词:Toksun coalfield sedimentary characteristics Xishanyao Formation coal-accumulation pattern |
| 基金项目:国家自然科学基金项目(编号: 40862004; 40862006); 新疆高校科学研究重点项目(编号: XJEDV2007I09) |
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| Sedimentary Characteristics and Coal-accumulation Pattern of the Xishanyao Formation in the Toksun Coalfield of Xinjiang |
| Based on analyzing a mass of data concerning bore cores, loggings, outcrops and palaeophyte, the authors used the basic theory and method of classic sequence stratigraphy to divide the sequence stratigraphy of the Xishanyao Formation in the TuokexunToksun coalfield. As a result, two sequences of SQ1 and SQ2 were identified. Then, according to the style of stratigraphic superposition and cycles of sedimentation, the Xishanyao Formation was subdivided into six system tracts. Through the study of basic deposition maps and the analysis of sedimentary environment, the authors defined the characteristics of sedimentary evolution. For SQ1 sequence, rivers dominated delta development to form stable peat swamps on the lake edge and in flood plain areas, and the long and intense coal accumulation led to the formation of a stable thick coal seam. As for SQ2 sequence, due to frequent changes in structure and subsequent strong denudation, the coal accumulation was gradually weakened. The analysis of sedimentary characteristics and coal accumulation of the Xishanyao Formation in the TuokexunToksun coalfield has provided a basis for further coal exploration. |
| LIU Lei,WANG Li-jin,TIAN Ji-jun,WU Tian-wei,MA Shuai.2011.Sedimentary Characteristics and Coal-accumulation Pattern of the Xishanyao Formation in the Toksun Coalfield of Xinjiang[J].Acta Geoscientica Sinica,32(5):549-558. |
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