花岗岩的变形构造和定位机制

通过测定花岗岩及其围岩的应变类型、组构特点和变形历史,可以推断花岗岩的定位机制。本文简单介绍了组构测量的方法和不同定位机制的判断标志,并以若干实例强调说明区域构造应力同岩桨的自然浮力和上升趋势相结合,能够产生各种不同的定位机制。

The Structural Deformation and Emplacement Mechanisms of Granites

Structural study on deformed plutons, attempted to determine the strain type, strain patterns and strain history within and around intrusions may be as a guide to explore the emplacement mechanism of granites. The main methods available in structural geology are briefly reviewed and examples of recent study of emplacement mechanism of plutons in different tectonic settings are briefly described. It is emphasized that the tectonical stress, in combination with the natural bouyancy and ascending tendency of magmas, can generate the varied emplacement mechanisms of granites.