Isotopic Ages of Minerals from Granitic Rocks of the Central Sierra Nevada and Inyo Mountains, California

Abstract

Research Article| February 01, 1965 Isotopic Ages of Minerals from Granitic Rocks of the Central Sierra Nevada and Inyo Mountains, California R. W KISTLER; R. W KISTLER U. S. Geological Survey. Menlo Park, Calif. Search for other works by this author on: GSW Google Scholar P. C BATEMAN; P. C BATEMAN U. S. Geological Survey. Menlo Park, Calif. Search for other works by this author on: GSW Google Scholar W. W BRANNOCK W. W BRANNOCK U. S. Geological Survey. Menlo Park, Calif. Search for other works by this author on: GSW Google Scholar Author and Article Information R. W KISTLER U. S. Geological Survey. Menlo Park, Calif. P. C BATEMAN U. S. Geological Survey. Menlo Park, Calif. W. W BRANNOCK U. S. Geological Survey. Menlo Park, Calif. Publisher: Geological Society of America Received: 09 Jun 1964 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1965, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1965) 76 (2): 155–164. https://doi.org/10.1130/0016-7606(1965)76[155:IAOMFG]2.0.CO;2 Article history Received: 09 Jun 1964 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation R. W KISTLER, P. C BATEMAN, W. W BRANNOCK; Isotopic Ages of Minerals from Granitic Rocks of the Central Sierra Nevada and Inyo Mountains, California. GSA Bulletin 1965;; 76 (2): 155–164. doi: https://doi.org/10.1130/0016-7606(1965)76[155:IAOMFG]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 SocietyGSA Bulletin Search Advanced Search Abstract Potassium-argon ages of biotite and hornblende from specimens of 17 granitic plutons in the central Sierra Nevada and the western Inyo Mountains, California, range from 69 to 183 m. y. The Mount Givens, Lamarck. and Round Valley Peak Granodiorites and related younger and more felsic quartz monzonites represent a pulse of magma emplaced in the general time interval of 80-90 million years ago, during Cretaceous time. Mineral ages of granitic rocks that flank these plutons on both the east and the west have been reduced during the emplacement of the Cretaceous intrusive rocks and are minimum ages for the time of crystallization. The ages of hornblende from the Tinemaha Granodiorite (150 to 180 m. y.) may approach crystallization dates. In conjunction with ages for other intrusive rocks in the Sierra Nevada and adjacent desert ranges they strongly suggest a magmatic episode during the Early Jurassic. 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.