摘要
本文对我国河东煤田府谷-保德矿区太原组(C_2)下段的骨架砂体(桥头砂岩)的几何形态、垂直层序类型、岩石学和矿物学特点、概率曲线特征、沉积构造类型及其组合特点、古水流特征进行了细致的观察与分析,结合该骨架砂体对下伏m_(13)厚煤层的冲刷样式,对其沉积环境和发育期的盆地独特的同沉积期的古构造背景进行了判断。识别了该砂体与上覆的m_(11)煤层之间存在的空间展布关系,指出了该砂体对m_(11)煤层聚集的独特控制方式。研究结果表明,该套砂体属于一种特殊过渡类型的河流环境的产物。
This paper deals with the coal-bearing measures of the Taiyuan Formation (C2) in the Fugu - Baode mine of the Hedong coalfield (the Northwest China) on the basis of the sedimentary characteristics of a main sandstone body (the Qiaotou sandstone body), including its mineralogy, petrology, textures, sedimentary structures, paleocurrents and spatial geometry. The depositional environment of the Qiaotou sandstone body and its erosional pattern in the m13 coal-seam and its spatial relationship to the overlying m11 coal-seam (above) were determined. The results suggest that the sandstone body was a product of a fluvial environment of a special transitional type.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2001年第4期562-569,共8页
Acta Geologica Sinica
基金
国家自然科学基金(编号49902012)
教育部高等学校骨干教师资助计划项目
关键词
河流环境
聚煤作用
太原组
府谷-保德矿区
河东煤田
山西
桥头砂岩体
Qiaotou sandstone body
fluvial environment
coal-accumulation processes
Taiyuan Forma-tion
Fugu -Baode mine
Hedong coalfield
