State of stress in the Long Valley caldera, California

Abstract

Research Article| September 01, 1993 State of stress in the Long Valley caldera, California Daniel Moos; Daniel Moos 1Department of Geophysics, Stanford University, Stanford, California 94305-2215 Search for other works by this author on: GSW Google Scholar Mark D. Zoback Mark D. Zoback 1Department of Geophysics, Stanford University, Stanford, California 94305-2215 Search for other works by this author on: GSW Google Scholar Author and Article Information Daniel Moos 1Department of Geophysics, Stanford University, Stanford, California 94305-2215 Mark D. Zoback 1Department of Geophysics, Stanford University, Stanford, California 94305-2215 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (9): 837–840. https://doi.org/10.1130/0091-7613(1993)021<0837:SOSITL>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 Daniel Moos, Mark D. Zoback; State of stress in the Long Valley caldera, California. Geology 1993;; 21 (9): 837–840. doi: https://doi.org/10.1130/0091-7613(1993)021<0837:SOSITL>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 Earthquake focal-plane mechanisms and well-bore breakouts in the Long Valley caldera, California, indicate that the resurgent dome and caldera south moat are characterized by a northeast extensional stress field, consistent with geodetically determined extensional strain within the caldera. Similar data from the western caldera indicate that it is characterized by a markedly different, northwest-trending, extensional stress field. We hypothesize that this localized rotation of the stress field is possible because of near-lithostatic pore pressure at depth. Because an east-west extensional stress field appears to have existed in the western caldera at the time of emplacement of the Inyo volcanic deposits (500-1000 yr ago), the state of stress in the Long Valley caldera appears to be both spatially and temporally heterogeneous, most likely as a consequence of intracaldera processes related to magmatic resurgence. 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.