87Sr/86Sr ratios in some volcanic rocks and some semifused inclusions of the San Francisco volcanic field

Research Article| November 01, 1975 87Sr/86Sr ratios in some volcanic rocks and some semifused inclusions of the San Francisco volcanic field Paul Pushkar; Paul Pushkar 1Department of Geology, Wright State University, Dayton, Ohio 45431 Search for other works by this author on: GSW Google Scholar Douglas B. Stoeser Douglas B. Stoeser 2Department of Geology, University of Oregon Eugene, Oregon 97403. Present address: U.S. Geological Survey, c/o American Embassy, A.P.O., New York 09697 Search for other works by this author on: GSW Google Scholar Geology (1975) 3 (11): 669–671. https://doi.org/10.1130/0091-7613(1975)3<669:SRISVR>2.0.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 Paul Pushkar, Douglas B. Stoeser; 87Sr/86Sr ratios in some volcanic rocks and some semifused inclusions of the San Francisco volcanic field. Geology 1975;; 3 (11): 669–671. doi: https://doi.org/10.1130/0091-7613(1975)3<669:SRISVR>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 SocietyGeology Search Advanced Search Abstract Two cinder cones and associated basaltic lava flows near Williams, Arizona, contain numerous inclusions of ultramafic and of felsic material. Many of the felsic inclusions are semifused and contain high 87Sr/86Sr ratios, yet the enclosing basalts do not show any enrichment in 87Sr when compared with other local basalts. Brown glass within a quartz monzonite inclusion has a much higher 87Sr/86Sr ratio than the inclusion as a whole. This is believed to reflect the domination of early-forming melts by biotite. If so, separation and assimilation of this glass by a magma offers a mechanism to increase the 87Sr/86Sr ratio of that melt without significant bulk assimilation of granitic material. 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.