阜新盆地艾友矿区沙海组沉积环境及聚煤规律

Sedimentary environment and coal accumulation of Shahai formation of Aiyou coalmine field in Fuxin basin

为了揭示阜新盆地艾友矿区沙海组的沉积环境特征及煤层聚积规律。采用沉积学、煤田地质学的基本理论和方法。对大量钻孔资料进行了分析。从中识别出冲积扇相、扇三角洲相和湖泊相,其中扇三角洲相最为发育,并指出在盆地加速沉降导致湖面扩张的背景下,沉积环境经历了冲积扇-扇三角洲-浅水湖泊的演化过程。最后,总结出扇三角洲平原及扇三角洲边缘处是主要的聚煤场所。为该矿区今后的进一步煤矿开采提供了依据。

In order to reveal the characters of sedimentary environment and coal accumulation of Shahai formation of Aiyou coalmine field in Fuxin basin and by means of the principle and the method of the sedimentology and coal geology it analyses lots of detailed borehole data are analyzed. Thereby the paper identifies alluvial fan facies, fan-delta facies and lacustrine fades and among them fan-delta facies most developed. Then it points out that in the background of lacustrine expansion induced by the accelerated sedimentation of basin sedimentary environment has undergone the course from alluvial fan to fan-delta to shallow lake. In the end it concludes that the plain and brim of fan-delta are the main places for coal accumulation. It provides references for further coalmine exploitation in this coalmine field henceforth.