Accession Number : AD0760105

Title :   Constant Strain-Rate Deformation of Amphibole Minerals.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Rooney,T. P. ; Riecker,R. E.

Report Date : 12 JAN 1973

Pagination or Media Count : 41

Abstract : The amphibole minerals, hornblende and tremolite in single-crystal and polycrystalline form, were deformed in compression at confining pressures from 5 to 20 kb and temperatures from 27 to 1200C at a strain rate of 10 to the minus 5th power/sec. Twinning on ((-1),0,1) is the major ductile deformation mechanism below 800C at all confining pressures. Although among the strongest silicates thus far measured, amphiboles show two major weakening mechanisms at elevated temperatures and confining pressures. (Author)

Descriptors :   (*ROCK FORMING MINERALS, DEFORMATION), STRESSES, STRAIN(MECHANICS), TWINNING(CRYSTALLOGRAPHY), HIGH PRESSURE, HIGH TEMPERATURE

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE