红河-金沙江走滑断裂带的岩浆活动特征与深部作用过程初探  

PRELIMINARY RESEARCH OF MAGMATIC ACTIVITY FEATURES AND DEEP PROCESS OF HONGHE─ JINSIIAJIANG STRIKE-SLIP FAULTED ZONE

作　　者：李玉文[1] 周文戈[1] 谢鸿森[1] 许祖鸣[1] 郭捷[1] 

机构地区：[1]中国科学院地球化学研究所,贵阳550002

出　　处：《地球物理学报》1998年第S1期115-122,共8页Chinese Journal of Geophysics

摘　　要：出露于红河-金沙江走滑断裂带及其两侧的碱性和偏碱性岩，主要为钾玄岩系列的火成岩，时代为第三纪其地球化学特征具俯冲带钙碱性系列与板内碱性系列的过渡性质，岩浆起源于软流圈的顶部软流圈物质的横波速度和厚度可能是岩浆活动出现与否的地球物理标志，出现火山活动地区的软流留物质的横波速度较低红河-金沙江走滑断裂带慢源岩浆活动的形成与印度板块向北挤压引起的岩石图下软流圈物质的运动有直接关系，在南北向的会聚过程中软流层物质可能扮演了重要的角色。The magmatic rocks found in Honghe-Jinshajiang strike-slip faulted zone mostly are shoshonite series igneous rock which were formed in the Himalayan pened. The characteristics of geochemistry are between calc-alkalic series and alkaline series, and their material sources are from the top asthenosphere. The formation of magma has relation to shear wave velocity and thickness of asthenosphere. Due to the collision and compression betWeen indian plate and Eurasia continent, the upper mantal material rose along the structural weakness zone. The asthenosphere material may be play an important player in the process of materials flowing along side direction caused by convergence betWeen indian plate and Eurasia continent.

关 键 词：红河-金沙江 走滑断裂 软流圈 波速 深部构造 

分 类 号：P588.11[天文地球—岩石学]