Well-preserved underplating structure of the jadeitized Franciscan complex, Pacheco Pass, California

Research Article| January 01, 1996 Well-preserved underplating structure of the jadeitized Franciscan complex, Pacheco Pass, California G. Kimura; G. Kimura 1Department of Earth Sciences, CIAS, Osaka Prefecture University, Sakai, Osaka 590, Japan Search for other works by this author on: GSW Google Scholar S. Maruyama; S. Maruyama 2Department of Earth and Planetary Sciences, Tokyo Institute of Technology, O-okayama, 2-12-1, Meguroku, Tokyo 152, Japan Search for other works by this author on: GSW Google Scholar Y. Isozaki; Y. Isozaki 2Department of Earth and Planetary Sciences, Tokyo Institute of Technology, O-okayama, 2-12-1, Meguroku, Tokyo 152, Japan Search for other works by this author on: GSW Google Scholar M. Terabayashi M. Terabayashi 3Department of Earth Sciences, Kagawa University, Takamatsu 760, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information G. Kimura 1Department of Earth Sciences, CIAS, Osaka Prefecture University, Sakai, Osaka 590, Japan S. Maruyama 2Department of Earth and Planetary Sciences, Tokyo Institute of Technology, O-okayama, 2-12-1, Meguroku, Tokyo 152, Japan Y. Isozaki 2Department of Earth and Planetary Sciences, Tokyo Institute of Technology, O-okayama, 2-12-1, Meguroku, Tokyo 152, Japan M. Terabayashi 3Department of Earth Sciences, Kagawa University, Takamatsu 760, Japan Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1996) 24 (1): 75–78. https://doi.org/10.1130/0091-7613(1996)024<0075:WPUSOT>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 Email Permissions Search Site Citation G. Kimura, S. Maruyama, Y. Isozaki, M. Terabayashi; Well-preserved underplating structure of the jadeitized Franciscan complex, Pacheco Pass, California. Geology 1996;; 24 (1): 75–78. doi: https://doi.org/10.1130/0091-7613(1996)024<0075:WPUSOT>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 Duplex structures several hundred metres thick bounded by marker beds exhibiting basalt-chert association have been found in the Franciscan complex near Pacheco Pass, central Diablo Range, California. The terrane was regionally metamorphosed and deformed under blueschist facies conditions at 150 °C and 7–8 kbar. Detailed mapping of the basalt-chert sequence has clarified the change of environment from mid-oceanic ridge to subduction zone. Eastward convergence of duplexing indicates eastward subduction of the oceanic plate during Early Cretaceous time. The presence of duplexing and a reconstruction of oceanic plate stratigraphy recorded within the underthrust unit demonstrate the accretionary origin of protoliths of the Franciscan coherent unit, which has long been believed to have an in situ origin, interpreted as either near-trench volcanism or accreted terranes in which "geosynclinal-type" volcanism occurred. 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.