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北京十三陵前寒武系常州沟组是同一沉积条件下形成的一套陆地—海相沉积地层,其由下至上可以划分出分流河道-河口湾、潮下砂坪、潮间泥坪、砂坝四个微沉积环境。各环境中沉积构造、沉积岩碎屑结构、沉积物组成以及动力条件明显不同,通过相标志组合、综合结构指数(T)、动力条件指数(DI)以及其它特征的全面研究,可以定性、定量地区分鉴别它们并引出砂岩结构成熟度和动力条件的数学分类标准。
The Precambrian Chang-Minggou Formation in Beijing Ming Tombs is a set of land-marine sedimentary formations formed under the same depositional conditions. From bottom to top, it can be divided into distributary channels-estuaries, tidal flats, intertidal mud beds, Sand dam four micro-depositional environment. Sedimentary structures, sedimentary rock composition, sediment composition and dynamic conditions of the sediments are obviously different in all environments. Through a comprehensive study of phase-and-sign combinations, comprehensive structural index (T), dynamic condition index (DI) and other characteristics, qualitative and quantitative regional Identify them and lead to mathematical classification of sandstone structure maturity and dynamics.