混合岩化作用的地质成因分类

有关混合岩及混合岩化作用形成机理的不同认识,至今在地质学和岩石学中仍是一个争论问题。作者强调混合岩化的发生、发展与地质环境之间的联系,应是成因研究的主要方面,不应有所忽视。据此,特混合岩化作用分为两类不同的地质成因类型:一种是区域性混合岩化作用;另一种为局部性混合岩化作用。作者从混合岩化作用形成时间、空间、成岩地质环境、与围岩关系、产状等方面将二种成因类型加以对比、区分,供在实际工作中参考。

GEOLOGICAL CLASSIFICATION OF MIGMATIZATION

Migmatite and mechanism of migmatization have been controversial issues in the study of geology and petrology for the past so years. There are mainly two schools, namely, anatexis ultrametamorphis (Holmquest, Eskola and others) and palingenesis (Wegmann, Read et al), the latter emphasizing, the replacement of the "ichor".Since migmatization is a geological process and related to geological setting , it is subdivided into regional and local migmatizations. The former is closely connected with and is a developmental stage of regional metamorphi-sm, while the latter is not directly related regional metamorphism, but mainly associated with magmas in depth (either anataxitic or palingenetic megmas) and alkaline fluids.