重力流的运动特点和类型

作者以鄂尔多斯地区奥陶系丰富的重力流沉积为例,借助非牛顿流体力学的基本原理,对重力流运动的特点和类型作了进一步的探讨,重力流运动的特点是:具层移(流)运动、有旋性、挤压性、涡旋性、惯性、颗粒上浮性、颗粒下沉、颗粒碰撞、剪切作用和下切作用。重力流可分为:滑动流、混合流、碎石(屑)流、颗粒流、液化流和浊流。

THE MOVEMENT CHARACTERISTICS AND TYPE OF THE GRAVITY FLOW

The gravity flow is a particular liquid-non-Newton liquid. Therefore, the further investigation on the movement characters and type of the gravity flow has been made by means of the basic principle of non-Newton hydrodynamics and detailed data of Ordovician gravity flow in the Ordos basin. Because of the special compositions, the gravity flow movement has shown the particular distin-guished features; 1. layer-like flow, 2. movemene with rotation character, 3. sq-ueeze nature, 4. vortex nature, 5. inertia, 6. buoyancy of grains, 7. subsidence of grains, 8. collision of grains, 9.shearing, 10. downward cutting. The gravity flow may be divided into the following types: slump flow, mixed flow, debris flow, grain flow, liquid flow and turbidity flow.