Title: Numerical Dynamic Analysis of Quartz Deformation Lamellae and Calcite and Dolomite Twin Lamellae
Abstract: Research Article| September 01, 1975 Numerical Dynamic Analysis of Quartz Deformation Lamellae and Calcite and Dolomite Twin Lamellae JOHN H. SPANG; JOHN H. SPANG 1Department of Geology, University of Calgary, Calgary, Alberta, Canada T2N 1N4 Search for other works by this author on: GSW Google Scholar JOYCEANNE VAN DER LEE JOYCEANNE VAN DER LEE 1Department of Geology, University of Calgary, Calgary, Alberta, Canada T2N 1N42Present address: Department of Geology, University of Toronto, Toronto, Ontario, Canada M5S 1A1. Search for other works by this author on: GSW Google Scholar Author and Article Information JOHN H. SPANG 1Department of Geology, University of Calgary, Calgary, Alberta, Canada T2N 1N4 JOYCEANNE VAN DER LEE 1Department of Geology, University of Calgary, Calgary, Alberta, Canada T2N 1N42Present address: Department of Geology, University of Toronto, Toronto, Ontario, Canada M5S 1A1. Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1975) 86 (9): 1266–1272. https://doi.org/10.1130/0016-7606(1975)86<1266:NDAOQD>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation JOHN H. SPANG, JOYCEANNE VAN DER LEE; Numerical Dynamic Analysis of Quartz Deformation Lamellae and Calcite and Dolomite Twin Lamellae. GSA Bulletin 1975;; 86 (9): 1266–1272. doi: https://doi.org/10.1130/0016-7606(1975)86<1266:NDAOQD>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 The method of numerical dynamic analysis has been applied successfully to samples of naturally deformed carbonate-cemented sandstone in which the quartz grains exhibit deformation lamellae and both calcite and dolomite grains exhibit twin lamellae. The naturally deformed samples are from the Foothills and Front Range subprovinces of the Canadian Rocky Mountains. The analysis of the quartz deformation lamellae assumes that the plane of the lamellae is a plane of high resolved shear stress, the sense of shear is negative, and the gliding direction is determined from the c axis and the pole to the lamellae. Using these assumptions, the existing methods of numerical dynamic analysis and the standard (graphic) dynamic analysis have been applied. Existing graphic techniques for the analysis of deformation lamellae yield essentially the same results as does the technique of numerical dynamic analysis.In this study, the correlation of the principal axes derived from numerical analysis of the quartz, calcite, and dolomite is both internally consistent and consistent with the geologic framework from which the samples were collected. It reflects the statistical homogeneity of the stress orientations during the deformation of these rocks. The samples all show a nearly layer-parallel compression of the layer with a range of orientations for the maximum principal stress that agrees well with maximum principal stress orientations calculated from analysis of macroscopic and megascopic structures related to the same thrust. 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.
Publication Year: 1975
Publication Date: 1975-01-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 12
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot