摘要
滇东北地区煤炭资源丰富,是我国西南地区重要的煤炭资源基地。以研究区及邻区以往研究成果为基础,综合分析野外地质调查及钻探等资料,从含煤地层岩性、聚煤带分布、成煤环境以及煤质特征四个方面分析了该区火山活动对晚二叠世聚煤作用的影响。研究结果表明,火山活动贯穿了整个晚二叠世成煤期,早期发生的峨眉山玄武岩喷发规模大,提供了煤系沉积的基底,在成煤古地理条件上控制了赋煤中心的分布,并且为含煤地层沉积提供了丰富的物源;后续发生的一系列火山活动影响了成煤环境的稳定性,同时过度的火山活动阻碍了成煤植物的生长,并对煤层的灰分、硫分、微量元素及变质程度造成影响。
The northeastern Yunnan holds abundant coal resources in store, thus a major coal resource base in the southwestern China. Based on previous research findings in the study area and neighboring areas, comprehensively analyzed field geological investigation and drilling data, have studied impact from volcanic activities on Late Permian Epoch coal accumulation in the area. The result shows that volcanic activities ran through whole late Permian coal-forming period, the early stage erupted large scope Emeishan basalt provided a basement for coal measures deposition. The coal-forming paleogeographical conditions have controlled the distribution of coal hosting centers and provided coal-bearing strata deposition with abundant material sources. A series of volcanic activities subsequently impacted the stableness of coal-forming environment. Excessive volcanic activities have obstructed the growing of coal-forming plants and influenced contents of ash, sulfur and trace elements in coal, as well as metamorphism degree of coal seams.
出处
《中国煤炭地质》
2013年第4期1-6,共6页
Coal Geology of China
基金
中国地质调查局国土资源大调查计划项目(1212010534601)
南方缺煤省份煤炭资源调查项目(1212011220764)
国土资源部中央地质勘查基金项目(2007531006)联合资助
关键词
峨眉山玄武岩
聚煤作用
晚二叠世
滇东北
Emeishan basalt
coal accumulation
Late Permian Epoch
northeastern Yunnan
