SEISMIC IMAGING OF UPPER-MANTLE STRUCTURE WITH NEW EVIDENCE FOR A 520-KM DISCONTINUITY

被引：212
作者：
SHEARER, PM
机构：
[1] Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, San Diego
来源：
NATURE | 1990年 / 344卷 / 6262期
关键词：
D O I：
10.1038/344121a0
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：
Stacked images of long-period seismic data reveal many phases, some not previously observed, which are caused by reflections and conversions at discontinuities in the Earth's upper mantle. These images support the existence of discontinuities at 410, 520 and 660km depth, but no evidence is found for a significant interface at 220 km. © 1990 Nature Publishing Group.
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页码：121 / 126
页数：6
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