【摘要】 本文将现代沉积学的概念与理论运用于清江流域古岩溶角砾岩的分类和描述;据其岩石学和矿物学特征,分析地下水沉积作用,确立形成环境与形成机制;结合其时空分布与区域地质格局的关联及样品测试,探讨了形成时代区域古水文地质条件的演变和岩溶发育期。更多还原

【Abstract】 By introducing the conception and theory of mordern sedimentology. the authors discribed and classified the paleokarst breccias distributed in the lower reaches of Qingjiang River(western Hubei Province). The sedimentation by under ground water flows was analysed on the basis of the petrologic and mineralogic characteristics of these breccias, and their forming condition and mechanism were consequently established. Joining with the studies about the correlations between their distribution in time and space and regional geologic setting, and with the analysis of samples, the evolution of the regional paleohydrogeological conditions and the karst development in their forming period are discussed.更多还原