摘要
滇东地区位于特提斯和环太平洋构造体系的交接部位,煤田构造格局的总体特征是呈NNE向条带状展布。区内断层以NNE、NE向为主,受主要断裂影响,煤田在南北向呈带状,东西向呈段状展布,各煤矿区在平面上呈NE向带状分布。研究区煤系赋存受基底主干断裂的控制作用明显,变形强度由北向南逐渐增强,北部地区以褶皱构造为主,断层较少,煤层多保存于向斜构造中,保存较完整,煤层埋藏较深;南部受弥勒-师宗断裂带影响,断裂构造极为发育,对煤层破坏严重,煤系赋存不稳定。
The eastern Yunnan area is located at the conjoined position between the Tethyan and circum-Pacific tectonic systems;the structural framework of the coalfield presents a NNE trend zonal distribution.Most faults in the area are NNE and NE trending,coalfields present belts from north to south,segments from east to west,and coalmine locations present a NE zonal distribution.Coal measures are obviously controlled by basement major faults,from north to south,the thrusting becomes stronger.In the north,folds are rather well developed and coal measures mostly hosted in synclines;because of less crustal stress,coal-bearing synclines are rather well preserved,but coal seams buried depth is deeper.While in the south,since impacts from the Mile-Shizong faulted zone,faults are rather well developed,thus stronger succeeding alteration of coal measures and seriously destructed coal seams.
出处
《中国煤炭地质》
2011年第8期56-59,共4页
Coal Geology of China
基金
煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM08B01)
云南省煤炭及煤层气资源潜力评价(资[2008]02-01-25)
关键词
煤田构造格局
煤系赋存
滇东地区
coalfield structural framework
coal measures hosting
eastern Yunnan area