INHOMOGENEITIES NEAR THE CORE-MANTLE BOUNDARY EVIDENCED FROM SCATTERED WAVES - A REVIEW

被引：55

作者：

BATAILLE, K

WU, RS

FLATTE, SM

机构：

[1] Physics Department and Institute of Tectonics, University of California, Santa Cruz, California

来源：

PURE AND APPLIED GEOPHYSICS | 1990年 / 132卷 / 1-2期

关键词：

core-mantle topography; inhomogeneities; Scattering; seismic waves; wave propagation;

D O I：

10.1007/BF00874361

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Statistical properties of small-scale inhomogeneities (wavelengths between 20 and 70 km) near the core-mantle boundary are inferred from scattered core waves. Observations of scattered core waves at large seismic arrays and worldwide networks indicate that the inhomogeneities have a global nature with similar characteristics. However, there may exist a few regions having markedly stronger or weaker strengths. Scattering by volumetric inhomogeneities of about 1% in P-wave velocity in the lower mantle or by about 300 m of topographic relief of the core-mantle boundary can explain the observations. At present it is not possible to rule out either of these two alternatives, or a combination of both. © 1990 Birkhäuser Verlag.

引用

页码：151 / 173

页数：23

共 47 条

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