下地幔及核幔边界结构及地球动力学

被引:14
作者
朱介寿
机构
[1] 成都理工学院!四川成都
关键词
地震层析成像; 下地幔; 核幔边界; 地球动力学;
D O I
暂无
中图分类号
P541 [地球动力学与大地构造理论];
学科分类号
070904 ;
摘要
新一代高分辨率下地幔及核幔边界的地震层析成像 ,改变了我们对全球构造模式及地球动力过程的认识。古海洋岩石圈板片一直俯冲到下地幔底部 ,其残留体在核幔边界积累 ,并支持了地幔整体对流模式。位于核幔边界上的 D″层有着十分复杂而精细的结构。紧靠核幔边界的地幔一侧发现了超低速层 ( ULVZ) ,它们可能是 D″层内的局部熔融物 ,是引起地表热点的上升地幔柱的源头。
引用
收藏
页码:139 / 142
页数:4
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