SEISMIC EVIDENCE FOR A 920-KM DISCONTINUITY IN THE MANTLE

被引：159
|
作者：
KAWAKATSU, H
NIU, FL
机构：
[1] Earthquake Research Institute, University of Tokyo, Bunkyo-ku, Tokyo 113
来源：
NATURE | 1994年 / 371卷 / 6495期
关键词：
D O I：
10.1038/371301a0
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Analysis of hundreds of seismograms from a seismic array in the Japanese islands reveals a seismic discontinuity at a depth of about 920 km in the mantle beneath the Tonga subduction zone. This discontinuity is also evident beneath subduction zones in the Japan and Flores seas. The discontinuity probably represents either a change in mantle chemical composition or the signature of the subducted slab's garnet layer.
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页码：301 / 305
页数：5
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