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在云南龙陵镇安狭长的山间盆地内,发育着一套以粗碎屑岩为主并含巨厚褐煤层的含煤建造,外表根像河流成煤环境,为此颇有争议。本文通过对该区成煤期构造、气候、植物、水文条件及其地理环境的研究分析,认为此粗屑物质并非通常所说的河流沉积物,是大量边缘互相重量入湖的冲积扇沉积,是个特殊的扇湖成煤环境。由于盆地小,相分异差,搬运短,含煤建造和湖沼是以粗碎屑岩为主。故它不同于国内外一般扇间湾和扇三角洲平原成煤。
In the narrow and long mountain basin in Longling Town, Yunnan Province, a set of coal-bearing constructs mainly composed of coarse clastic rocks and containing huge thick brown coal seams has been controversial. Based on the analysis of the coal formation period, climate, plant and hydrological conditions and its geographical environment in this area, it is concluded that this coarse-grained material is not commonly referred to as river sediment and is deposited by alluvial fans with a large number of edge- Is a special fan lake coal environment. Due to the small basin, the phase difference and the short transportation, coal-based construction and lakes are dominated by coarse clastic rocks. Therefore, it is different from the general domestic and international fan bay and fan delta plain coal.