条带状构造及矿物变形的研究——以冀东太古宙高级区为例

A STUDY ON BANDING STRUCTURE AND MINERAL DEFORMATION-An example from the Archaean high gradeterrane in Eastern Hebei

笔者发现冀东地区的混合岩化条带只是局部现象,而大部分条带构造与变形作用有关,根据成因不同,可将条带状构造划分为三种类型:①复合条带;②构造置换条带;③变质构造分异条带,其中变质构造分异条带分布最为广泛,组成这种条带的矿物在不同构造相中各有其变形特点。

Great interests have been concentrated in banding structure of metamorphic rocks in high grade terrane in the world, and remarkable achivements have been made in recent years. Great interests have been concentrated in banding structure of metamorphic rocks in high grade terrane in the world, and remarkable achivements have been made in recent years.Banding structure in Archaean high grade terrane in Eastern Hebei are thought to be migmatic origin in most of the previous documents. Detailed research by the author revealed that banding structure derived from migmatization just appears in a relatively small area. Most of the bands are related to deformation. According to their origion , bands can be divided into three types: 1, complex banding; 2, structural substituted banding; 3, metamorphic structural differentiation banding. The later is widely distributed in this kind of bands exhibit different features(or characters) in different tectonic facies.