Acoustic Emissions Produced by Anticrack Faulting during the Olivine-]Spinel Transformation

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Journal Article
Year of Publication: 
1992
Authors: 
Green, H. W.; Scholz, C. H.; Tingle, T. N.; Young, T. E.; Koczynski, T. A.
Editor: 
Journal Title: 
Geophysical Research Letters
Journal Date: 
Apr 24
Place Published: 
Tertiary Title: 
Volume: 
19
Issue: 
8
Pages: 
789-792
Section / Start page: 
Publisher: 
ISBN Number: 
0094-8276
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:A1992HR64100015
LDEO Publication Number: 
Call Number: 
Key Words: 
deep-focus earthquakes; high-pressure; mechanism; gouge;
Abstract: 

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.

Notes: 

Hr641Times Cited:28Cited References Count:23

URL: 
<Go to ISI>://A1992HR64100015
DOI: