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Title:
A new self-organizing mechanism for deep-focus earthquakes
Authors:
Green, H. W., II; Burnley, P. C.
Affiliation:
AA(California, University, Davis), AB(California, University, Davis)
Publication:
Nature (ISSN 0028-0836), vol. 341, Oct. 26, 1989, p. 733-737. Research supported by NSF. (Nature Homepage)
Publication Date:
10/1989
Category:
Geophysics
Origin:
STI
NASA/STI Keywords:
Earth Mantle, Earthquakes, Geological Faults, Self Organizing Systems, Tectonics, Depth, Microstructure, Olivine, Phase Transformations, Spinel
DOI:
10.1038/341733a0
Bibliographic Code:
1989Natur.341..733G

Abstract

Experimental observations of high-pressure faulting of metastable Mg2GeO4 olivine as it undergoes incipient transformation to a spinel structure are reported. A model is presented in which this faulting arises from the generation, propagation, and linkup of spinel-filled anticracks. When applied to the olivine-to spinel transformation in the earth's mantle, the anticrack model satisfactorily accounts for the similarities and differences between shallow and deep earthquakes and removes the problems associated with frictional sliding.
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Database: Astronomy
Physics
arXiv e-prints