流体动力角砾岩分类及其地质意义

CLASSIFICATION AND GEOLOGICAL SIGNIFICANCE OF FLUID DYNAMIC BRECCIA

根据流体产生异常高压，并在一定条件下分别发生爆发作用、流化作用及水压作用原理，认为从爆发作用到水压作用可分别形成爆发角砾岩系列、流化角砾岩系列及水压角砾岩系列。研究了上述三类流体动力角砾岩的相互关系、鉴别标志及亚类划分。指出异常高压流体在一定条件下既可向增压方向发展，也可向降压方向演化，并以研究实例说明流体动力角砾岩系列岩石的地质作用过程包括爆发作用、流体作用及水压作用三个阶段之一或二或三。

Because fluid may induce abnormally high pressure and explosion heomorphism and hydrofracturing under special conditions, it is suggested that explosive breccia, rheonorphic breccia and hydrofracturing breccia can be formed respectively from explosion to hydrofracturing. In this paper, the mutual relation, characteristics and subdivision, of the three types of fluid dynamic breccia metioned above, are studied, and it is suggested that abocormal high-pressure fluid may develop toward either the direction of increasing pressure or that of decreasing pressure, and some examples have been used to explain that the geological process of fluid dynamic breccia might experience one, two or three stages of explosion, rheomorphism and hydrofracturing.