摘要
岩墙群是深源岩浆浅侵位的产物 ,它可提供有关壳 -幔演化的重要信息。通过华北北部大同早中生代碳酸岩一煌斑岩岩墙群、赤峰早中生代闪长玢岩岩墙群、林西中生代辉绿岩岩墙群、京北晚中生代双峰式岩墙群的对比研究 ,揭示了华北中生代存在的两次底侵作用及其相关的伸展作用。华北早、晚中生代岩墙群与晋北地区元古代岩墙群的初步对比 。
Dyke swarms are products of typhonic magma which may provide important information about the crust-mantle evolution. This work studies comparatively several dyke swarms in the north of North China, including the Early Mesozoic Datong carbonatite-lamprophyre dyke swarms, Early Mesozoic Chifeng dioritic porphyrite-diabasic dyke-swarms, Mesozoic Linxi diabasic dyke-swarms, and North-Beijing Late Mesozoic bimodal dyke swarms. Thus it is revealed that there were two successive processes of underplating and accompanying extension in the Mesozoic in North China. Comparison of the Early Mesozoic, Late Mesozoic, and Protozoic dyke swarms in North in certain extent reflects revolution of the mantle composition in North China.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第3期312-318,共7页
Acta Petrologica Sinica
基金
国家自然科学基金项目 (49872 0 79
40 0 72 0 73 )
中国科学院知识创新工程重大项目 (KZCX1 -0 7)研究成果
