三(都)—丹(寨)地区中寒武世至早奥陶世碳酸盐重力流沉积

Carbonate Gravity-Flow Sedimentation from Middle Cambrian Period to Lower Ordovician Period in Sandu-Danzhai Region

三(都)—丹(寨)地区在中寒武世至早奥陶世发育了一套别具特色的碳酸盐重力流沉积。这套沉积物厚度大,特征各异,类型多样。可分为碎屑流、浊流、块体流,此外还有崩塌沉积、滑塌沉积等,它们在时空演化和空间上有着直接或间接联系。本文用实际资料论述了上述各种重力流类型的地质特征及它们相互间的时空演化关系,并对其形成机理和沉积模式作一定探讨。

There was a deposit of carbonate gravity flow from Middle Cambrian Period to Lower Ordovician Period in Sandu--Danzhai area. The carbonate gravity flows can be divided into clastic flow, turbidity flow,mass flow as well as collapse and gravity-slide and so on which form thick and different features of gravity-flow sediments. Here, the geological features and the relationships in time and space of above-mentioned types of gravity flows have been studied. Also,the machanics of formation and sedimentary model of the gravity flows have been probed.