Dike-induced faulting in rift zones of Iceland and Afar

Research Article| May 01, 1988 Dike-induced faulting in rift zones of Iceland and Afar Allan M. Rubin; Allan M. Rubin 1Department of Geology, Stanford University, Stanford, California 94305 Search for other works by this author on: GSW Google Scholar David D. Pollard David D. Pollard 1Department of Geology, Stanford University, Stanford, California 94305 Search for other works by this author on: GSW Google Scholar Geology (1988) 16 (5): 413–417. https://doi.org/10.1130/0091-7613(1988)016<0413:DIFIRZ>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Allan M. Rubin, David D. Pollard; Dike-induced faulting in rift zones of Iceland and Afar. Geology 1988;; 16 (5): 413–417. doi: https://doi.org/10.1130/0091-7613(1988)016<0413:DIFIRZ>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 SocietyGeology Search Advanced Search Abstract Geodetic data and field observations demonstrate that the emplacement of dikes in volcanic rift zones frequently generates normal faulting and graben subsidence at the Earth's surface. Elastic modeling of the vertical ground-surface displacements above dikes and faults indicates that the extent of graben subsidence can be achieved only if fault slip extends virtually to or beyond the dike plane at depth. A mechanical model that includes dikes and frictional faults shows that dike opening tends to compress and lock faults located to either side of the dike. Therefore, slip extending into or beyond the dike cavity must occur either (1) on faults that intersect the dike near its top, above the zone of dike-induced compression, or (2) on faults that slip ahead of the dike as it propagates laterally. Data from Iceland indicate that slip occurred on deep faults that presumably slipped in advance of the laterally propagating dike. 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.