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昆明盆地是云南省规模较大的山间断陷盆地,盆地沉积厚度巨大,其中晚新生代沉积厚达千余米,含有丰富的泥炭、褐煤资源,是研究现代聚煤、成煤作用的良好场所。通过对盆地内晚新生代泥炭、褐煤的主要沉积环境与沉积类型,分布特征,聚煤期以及不同沉积层位和沉积凹陷的含煤特征等的研究表明,盆地中泥炭主要形成于全新世,与湖湾、湖滨三角洲平原分流间洼地沉积环境关系密切。褐煤形成于上新世—更新世,主要由不同时期的曲流河、河口三角洲、浅湖沉积环境聚集,主要聚煤期为上新世、下更新世,中上更新世,且以上新统洪家村组上部第二段(N_2~(2-2)),下更新统滇池组下部(Q_1~1)、上部(Q_1~2)层位含煤性最好,杨华、九甲、西坝河凹陷聚煤作用最强.
The Kunming Basin is a large-scale mountainous faulted basin in Yunnan Province. The sediments of the basin are huge in thickness, of which the Late Cenozoic sediments are over a thousand meters thick and rich in peat and lignite resources, which is a good place to study the effect of modern coal accumulation and coal formation . Based on the studies on the major sedimentary environments, depositional types, distribution characteristics, coal-forming age and coal-bearing characteristics of different sedimentary beds and sedimentary sags in late Cenozoic peat and lignite in the basin, peat was mainly formed in the Holocene in the basin, And Lake Bay, lake delta plain shunt between the depositional environment is closely related. Lignite was formed in the Pliocene-Pleistocene, which mainly consists of meandering rivers, estuarine delta and shallow lacustrine sedimentary environments in different periods. The main coal-forming periods are Pliocene, Lower Pleistocene, Middle-Upper Pleistocene, The second coal rank in the upper part of Hongjiacun Formation (N_2 ~ (2-2)) and the lower Pleistocene Dianchi Formation (Q_1 ~ 1) and upper Q_1 ~ 2 Xibahe depression has the strongest coal accumulation effect.