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贺兰山北段煤田包括了银川以北的平罗、石咀山和乌达等地的十个石炭纪一二叠纪煤矿区。其中,胡芦司太、石炭井、李家沟和马连滩等四个矿区(简称胡—石矿区)是本文主要涉及区。 笔者试图从区域地质背景,晚石炭世聚煤环境演化史,中段砂体的形态与分布,砂体与岸线的关系,垂直层序,层理特征与古
The Northern Helan Mountain coalfield includes ten Carboniferous-Permian coal mining areas in Pingluo, Shizuishan and Wuda, north of Yinchuan. Among them, Hulu Si too, Carboniferous, Lijiagou and Ma Liantan four mining (referred to as Hu - quarry) is the main area of this article. The author attempts to analyze the relationship between the sand body and the shoreline from the regional geological background, the evolution history of the Late Carboniferous coal accumulation environment, the shape and distribution of the middle sand body, the relationship between the sand body and the shoreline, the vertical sequence,