OCEANIC CRUSTAL STRUCTURE - MID-ATLANTIC RIDGE AT 45-DEGREES-N

被引：35

作者：

FOWLER, CMR ^{[1
]}

KEEN, CE ^{[1
]}

机构：

[1] BEDFORD INST OCEANOG, ATLANTIC GEOSCI CTR, DARTMOUTH, NS B2Y 4A2, CANADA

来源：

GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY | 1979年 / 56卷 / 01期

关键词：

D O I：

10.1111/j.1365-246X.1979.tb04777.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. We present a velocity—depth model for the crust beneath the Mid‐Atlantic Ridge at 45° N which is derived from a comparison of waveforms corresponding to observed and synthetic seismograms. The model which best fits the observations includes a high‐velocity layer at the base of the crust (layer 3B) and a velocity gradient in the upper mantle. These results are in agreement with other recent seismic studies on the Mid‐Atlantic Ridge and indicate that the velocity structure is more complex than that obtained from travel‐time analysis. There is no evidence for a low‐velocity zone at the base of the crust. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：219 / 226

页数：8