EXPERIMENTAL DEFORMATION AND FAULTING IN WOMBEYAN MARBLE

Abstract

Research Article| April 01, 1958 EXPERIMENTAL DEFORMATION AND FAULTING IN WOMBEYAN MARBLE M. S PATERSON M. S PATERSON DEPARTMENT OF GEOPHYSICS, THE AUSTRALIAN NATIONAL UNIVERSITY, CANBERRA, AUSTRALIA Search for other works by this author on: GSW Google Scholar Author and Article Information M. S PATERSON DEPARTMENT OF GEOPHYSICS, THE AUSTRALIAN NATIONAL UNIVERSITY, CANBERRA, AUSTRALIA Publisher: Geological Society of America First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1958, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1958) 69 (4): 465–476. https://doi.org/10.1130/0016-7606(1958)69[465:EDAFIW]2.0.CO;2 Article history First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation M. S PATERSON; EXPERIMENTAL DEFORMATION AND FAULTING IN WOMBEYAN MARBLE. GSA Bulletin 1958;; 69 (4): 465–476. doi: https://doi.org/10.1130/0016-7606(1958)69[465:EDAFIW]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract In compressive stress-strain tests on a coarse-grained marble at various confining pressures up to 1000 kg cm−2, special attention has been paid to the transition from brittle to ductile behavior. The application of low confining pressures suppresses the longitudinal fractures characteristic of failure at atmospheric pressure, and well-defined shear failures develop. The formation of the localized shear zones accompanies a gradual decrease in the stress needed for continued deformation but does not lead immediately to complete fracture. This behavior may be initiated by a type of plastic instability. Its relevance to geological faulting is discussed, since the shear zones developed in the marble specimens appear to be similar to geological faults.At confining pressures above about 300 kg cm−2, the stress-strain curves rise continuously without reaching a maximum, and the deformation is distributed throughout the specimen instead of being localized in shear zones or faults. This suggests that there is a depth in the earth's crust below which faulting cannot be expected in this rock.The stress-strain curves have been analyzed to show the effect of confining pressure on the yield stress and on the stress at the maximum load. A few measurements on a fine-grained limestone are also included in an appendix.Coloration of the marble by X radiation occurs after deformation at low confining pressures, but the effect becomes more marked at higher confining pressures. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.