Experimental Deformation of Hasmark Dolomite

Research Article| October 01, 1955 EXPERIMENTAL DEFORMATION OF HASMARK DOLOMITE JOHN HANDIN; JOHN HANDIN 3737 BELLAIRE BOULEVARD, HOUSTON 25, TEXAS; DEPARTMENT OF GEOLOGY AND GEOPHYSICS, MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE 39, MASS. Search for other works by this author on: GSW Google Scholar H. W FAIRBAIRN H. W FAIRBAIRN 3737 BELLAIRE BOULEVARD, HOUSTON 25, TEXAS; DEPARTMENT OF GEOLOGY AND GEOPHYSICS, MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE 39, MASS. Search for other works by this author on: GSW Google Scholar Author and Article Information JOHN HANDIN 3737 BELLAIRE BOULEVARD, HOUSTON 25, TEXAS; DEPARTMENT OF GEOLOGY AND GEOPHYSICS, MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE 39, MASS. H. W FAIRBAIRN 3737 BELLAIRE BOULEVARD, HOUSTON 25, TEXAS; DEPARTMENT OF GEOLOGY AND GEOPHYSICS, MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE 39, MASS. Publisher: Geological Society of America Received: 30 Sep 1954 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1955, 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 (1955) 66 (10): 1257–1274. https://doi.org/10.1130/0016-7606(1955)66[1257:EDOHD]2.0.CO;2 Article history Received: 30 Sep 1954 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation JOHN HANDIN, H. W FAIRBAIRN; EXPERIMENTAL DEFORMATION OF HASMARK DOLOMITE. GSA Bulletin 1955;; 66 (10): 1257–1274. doi: https://doi.org/10.1130/0016-7606(1955)66[1257:EDOHD]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 Jacketed cylindrical specimens of pure, homogeneous, anisotropic Hasmark dolomite have been deformed dry under a constant confining pressure of 5000 atm at a strain rate of 1 per cent per minute. Uniaxial compression and extension experiments were carried out on cylinders oriented parallel and perpendicular to the direction of the optic-axis maximum of the fabric, and tests were conducted at room temperature and at 300°C for each orientation. All tests ended in fracture along a shear surface inclined at about 60° to the least principal stress axis, at a strain of less than 10per cent. The stress-strain curves obtained suggest (1) little or no strength anisotropy beyond the yield points, (2) little or no effect of temperature on strength or ductility, (3) a marked dependence of strength on normal stress.The grain orientation of the deformed specimens was investigated by standard U-stage methods. After deformation at 300°C the principal visible change in the fabric is a moderate development of twins. Measurements indicate that these have a negative1 direction sense of gliding, thus conforming with the recent lattice analysis of Bradley et al. (1953) and the recent experimental work of Turner et al. (1954). Observed results compare favorably with predicted deformed fabrics based on the assumption of twin-glide on in a negative sense, a mechanism further supported by lamellae-spacing index data. No unequivocal evidence for translation-glide on the base {001} or for any other mechanisms was found. However, preliminary results of single crystal experiments confirm Johnsen's (1902) discovery of basal translation. 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.