ACOUSTIC EMISSIONS PRODUCED BY ANTICRACK FAULTING DURING THE OLIVINE-]SPINEL TRANSFORMATION

被引：44

作者：

GREEN, HW ^{[1
]}

SCHOLZ, CH ^{[1
]}

TINGLE, TN ^{[1
]}

YOUNG, TE ^{[1
]}

KOCZYNSKI, TA ^{[1
]}

机构：

[1] COLUMBIA UNIV,LAMONT DOHERTY GEOL OBSERV,PALISADES,NY 10964

来源：

GEOPHYSICAL RESEARCH LETTERS | 1992年 / 19卷 / 08期

关键词：

D O I：

10.1029/92GL00751

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Anticrack faulting during the phase transformations of olivine to its denser polymorphs is a principal contender for the mechanism of deep-focus earthquakes. The original work on Mg2GeO4 established that initiation of faulting by this mechanism is not due to brittle fracture and subsequent experiments on olivine of mantle composition showed that it can operate at pressures of at least 14 GPa. Here we report acoustic emissions accompanying anticrack faulting in Mg2GeO4, thereby confirming that this mechanism involves a dynamic instability accompanied by elastic radiation.

引用

页码：789 / 792

页数：4

共 23 条

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