GLOBAL MAPPING OF TOPOGRAPHY ON THE 660-KM DISCONTINUITY

被引：218

作者：

SHEARER, PM

MASTERS, TG

机构：

[1] Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, San Diego

来源：

NATURE | 1992年 / 355卷 / 6363期

关键词：

D O I：

10.1038/355791a0

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：

Long-period precursors to the SS seismic phase are used to produce global maps of topography for the discontinuity at 660 km depth in the upper mantle. These maps indicate discontinuity depth variations of up to 30 km and suggest a correlation between regional depressions in the 660-km discontinuity and subduction zones - a result more consistent with models in which the subducting slabs are deflected horizontally at the discontinuity than with models of unhindered slab penetration into the lower mantle.

引用

页码：791 / 796

页数：6

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