An application of eigenvalue methods to structural domain analysis

Research Article| June 01, 1990 An application of eigenvalue methods to structural domain analysis FREDERICK W. VOLLMER FREDERICK W. VOLLMER 1Department of Geological Sciences, State University of New York, New Paltz, New York 12561 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1990) 102 (6): 786–791. https://doi.org/10.1130/0016-7606(1990)102<0786:AAOEMT>2.3.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation FREDERICK W. VOLLMER; An application of eigenvalue methods to structural domain analysis. GSA Bulletin 1990;; 102 (6): 786–791. doi: https://doi.org/10.1130/0016-7606(1990)102<0786:AAOEMT>2.3.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 subdivision of a geologic map into structural domains involves the location of regions in which the rock fabric has certain geometrical characteristics; typically, foliation data should share a common axis. The location of such domains involves working interactively with map and equal-area projections of the data set, a tedious and often subjective process. Eigenvector methods can quantify this type of analysis. A set of four eigenvalue-based indexes assists in discriminating among fabric distributions, particularly between strong and weak cylindrical distributions. These indexes form the basis of a triangular diagram for distinguishing among point, girdle, random, and cylindrical fabrics. A domain search proceeds by subdividing the data set and attempting to maximize the total cylindricity, or other characteristic. The method has been applied to a set of foliation data from a fold nappe in the Western Gneiss Region of the Norwegian Caledonides. The resulting domains define a late fold that refolds the recumbent nappe. Lineation and fold-axis data from the area support the results of the domain search. This method may be valuable in other areas of complex geometry. 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.