晋冀蒙高级区两期高压麻粒岩的地质特征及成因  

THE GEOLOGICAL FEATURES AND ORIGIN OF TWO-STAGE-HIGH-PRESSURE BASIC GRANULITE FROM THE SHANXI-HEBEI-INNER MONGOLIA TERRA IN NORTH CHINA CRATON

作　　者：钟长汀[1] 

机构地区：[1]中国地质科学院天津地质矿产研究所,天津300170

出　　处：《前寒武纪研究进展》1999年第2期53-58,共6页Progress in Precambrian Research

基　　金：国家自然基金!49472141

摘　　要：晋冀蒙高级区存在两期高压麻粒岩，其分布、产状、时代、成因都不同。早期高压麻粒岩，沿宣化西葛峪、大东沟、怀安蔓菁沟南部、恒山白蟒石一带分布，呈透镜状产于钾长花岗岩中，形成时代约2400Ma，属岩浆包体。晚期高压麻粒岩，沿孔兹岩系和麻粒岩杂岩的接触带分布，呈透镜状、岩脉状产出，并和孔兹岩岩片、高温韧性剪切带、超基性岩一同构成具有“混杂岩”性质的构造-岩浆杂岩带，其时代为1800Ma左右。In the Jin-Ji-Meng (Shanxi-Hebei-Inner Mongolia ) high-grade terrain, NorthChina craton, two-stage- high- pressure granulite can be dist inguished from their distribut ion,occurrence and ages. The earlier distribute along Xigeyu - Dadonguo-south Manjinggou-Baimangshi, thcy occurre as xenolith in the potassium granite, the isotoic ages are about 2400Ma. Th later distribute along Paol iang- Huangt uy8Ch Manj inguo. Thcy occurre as lens or dikesalong the conact belt between Khondalite and TTG gness, the isotopic ages show they intrudedat about 1 800 Mi when the collisdri of Ordos continen with Easter Heibei coninen occurred.

关 键 词：晋冀蒙地区 高压麻粒岩 深源包体 麻粒岩 

分 类 号：P588.346[天文地球—岩石学]