Abstract
Research Article| August 01, 1974 SR87/SR86 Ratios of Calc-Alkalic Lavas from the Rabaul Caldera, Papua New Guinea ZELL E. PETERMAN; ZELL E. PETERMAN 1U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar ROBERT F. HEMING ROBERT F. HEMING 2Department of Geology and Geophysics, University of California, Berkeley, Berkeley, California 94720 Search for other works by this author on: GSW Google Scholar Author and Article Information ZELL E. PETERMAN 1U.S. Geological Survey, Denver, Colorado 80225 ROBERT F. HEMING 2Department of Geology and Geophysics, University of California, Berkeley, Berkeley, California 94720 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1974) 85 (8): 1265–1268. https://doi.org/10.1130/0016-7606(1974)85<1265:SROCLF>2.0.CO;2 Article history First Online: 01 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 ZELL E. PETERMAN, ROBERT F. HEMING; SR87/SR86 Ratios of Calc-Alkalic Lavas from the Rabaul Caldera, Papua New Guinea. GSA Bulletin 1974;; 85 (8): 1265–1268. doi: https://doi.org/10.1130/0016-7606(1974)85<1265:SROCLF>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 Eight samples of basaltic-to-rhyolitic calc-alkalic lavas erupted from the Rabaul caldera on the island of New Britain have Sr87/Sr86 ratios ranging from 0.7035 to 0.7040 and averaging 0.7038. The mean strontium-isotope ratio is in the middle of an extremely limited range of values for other calc-alkalic island-arc lavas of the western and southwestern circum-Pacific region. The constancy of Sr87/Sr86 in the Rabaul lavas is compatible with derivation of the andesitic and more silicic members of the series by fractional crystallization of a basaltic magma. However, the strontium-isotope data do not preclude different degrees of partial melting of an isotopically uniform source in the mantle as a possible mechanism for producing the compositional variety of lavas at Rabaul. 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.
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