摘要
本文通过对产于华北地台南缘的河南鲁山一带晚太古代太华群及秦岭造山带的河南桐柏地区早元古代大河组两个不同构造单元麻粒岩样品形成的温度-压力、地球化学及地球物理性质的综合研究表明,两地麻粒岩均是在下地壳条件下形成的,但两者的形成环境不同。
The lower continental crust plays a crucial role in continental evolution and mountain building. It is widely accepted that the lower crust is dominated by granulites , mafic or felsic. The paper presents our studies on geothermobarometry , geochemistry and geophysical proper-ties of granulites from two adjacent tectonic units , graunlites from the late Archean Taihau complex in the southern margin of the North China craton in Lushan and from the early Proterozoic Dahe formation in the Qinling orogen in Tongbai, eastern Henan. The results indi-cate that the granulites from the two units were formed within the P ?T regime of the lower crust but in the distinct environments.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1990年第4期441-449,共9页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金资助项目
关键词
下地壳
麻粒岩
地球化学
地球物理
lower crust , granulite , geothermobarometry , curie point , high conductivity layer , crust magnetic layer .
