利用当代已知环境沉积物的粒度分析资料来探索古代沉积物的沉积环境,是岩相古地理研究工作中的一种重要手段。我们对鄂东南(包括赣北部分地区)麻土坡煤系下煤顶板砂岩做了50多个样品的粒度分析,进行了各种粒度参数的计算,编制了各种粒度参数图件,试图揭示砂岩沉积时的介质动力条件,继而判断沉积环境。 It is an important method in the research of lithofacies palaeogeography to use the grain-size analysis data of contemporary known environmental sediments to explore the sedimentary environment of ancient sediments. We conducted a particle size analysis of more than 50 samples of Maotipo coal-bearing coal-bearing roof sandstone in the southeastern part of Hubei (including part of northern Jiangxi), calculated various particle size parameters, and prepared maps of various particle size parameters in an attempt to reveal Sandstone deposition medium dynamic conditions, and then determine the depositional environment.