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Significance of uniaxial and hydrostatic pressure studies on ancient oceanic rocks in tectonics

DRS at CSIR-National Institute of Oceanography

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Title Significance of uniaxial and hydrostatic pressure studies on ancient oceanic rocks in tectonics
 
Creator Sarma, K.V.L.N.S.
Ramana, Y.V.
 
Subject Geology and Geophysics
rocks
tectonics
drilling
hydrostatic pressure
ophiolites
palaeo studies
ISW, Indian Ocean
 
Description Uniaxial studies are carried out on Indus suture zone rocks of Kashmir Himalaya, which are supposed to be dismembered ophiolites. The percentage difference between the sonic and static determined Young's modulus varies from 4% to 25% Serpentinite showed the lowest value of compressive strength (45 MPa) and pyroxenite gave the highest value (269 MPa), while meta volcanics exhibited narrow limits of 58 to 245 MPa. Standard correlations were obtained for compressive strength to G/P ratio and for compressive strength to tensile strength. Standard correlations for compressive strength to Young's modulus and compressive strength to maximum strain energy wil bring out anomalous behavior, if any, of the different rock types, as well as the detection of weak zones. Compressional wave velocity measurements were carried out on all the samples of the sequence up to 10 kbar pressure by simulating the similar hydrostatic pressure conditions of oceanic crust, since the rocks are supposed to represent the ancient oceanic crust (ophiolites). The relationship between the number of cracks/m to compressional wave velocity have been established. These results can be compared with the dredged samples of oceanic crustal rocks of other regions in drilling since these studies are carried out in the same pressure conditions
 
Date 1997-07-05T10:06:27Z
2017-09-30T01:56:27Z
1997-07-05T10:06:27Z
2017-09-30T01:56:27Z
1994
 
Type Journal Article
 
Identifier Marine Georesources & Geotechnology, vol.12(1); 1994; 1-10
1064-119X
http://drs.nio.org/drs/handle/2264/7431
 
Language en
 
Relation Mar Georesour Geotec
SCI
 
Publisher Taylor and Francis