STUDY OF SHALLOW GLOBAL MANTLE FLOW DUE TO THE ACCRETION AND SUBDUCTION OF LITHOSPHERIC PLATES

被引：35

作者：

PARMENTIER, EM

OLIVER, JE

机构：

[1] CORNELL UNIV,DEPT GEOL SCI,ITHACA,NY 14850

[2] DEPT GEOL & MINERAL,OXFORD,ENGLAND

来源：

GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY | 1979年 / 57卷 / 01期

关键词：

D O I：

10.1111/j.1365-246X.1979.tb03768.x

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：

Summary. Models of shallow, global mantle circulation due to the accretion and subduction of lithospheric plates are formulated as potential theory problems on a sphere. Subducting and accreting plate boundaries represent sources and sinks respectively for the sublithospheric flow. Solutions, which are obtained by finite difference approximations, give the instantaneous flow velocities within the asthenosphere compatible with plate boundaries and relative plate motions. Results are presented for present‐day plate boundaries and relative plate motions for the case of a uniform viscosity asthenosphere and for that of a low viscosity zone at the base of the lithosphere. These results are discussed in terms of available geophysical data. Some of the implications of a shallow, mantle‐wide circulation are also considered. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：1 / 21

页数：21

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