Petrogenesis of Lavas from Western Samoa

Research Article| September 01, 1972 Petrogenesis of Lavas from Western Samoa C. E HEDGE; C. E HEDGE U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Z. F PETERMAN; Z. F PETERMAN U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar W. R DICKINSON W. R DICKINSON Geology Department, Stanford University, Stanford, California 94305 Search for other works by this author on: GSW Google Scholar Author and Article Information C. E HEDGE U.S. Geological Survey, Denver, Colorado 80225 Z. F PETERMAN U.S. Geological Survey, Denver, Colorado 80225 W. R DICKINSON Geology Department, Stanford University, Stanford, California 94305 Publisher: Geological Society of America Received: 01 Mar 1972 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1972, 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 (1972) 83 (9): 2709–2714. https://doi.org/10.1130/0016-7606(1972)83[2709:POLFWS]2.0.CO;2 Article history Received: 01 Mar 1972 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation C. E HEDGE, Z. F PETERMAN, W. R DICKINSON; Petrogenesis of Lavas from Western Samoa. GSA Bulletin 1972;; 83 (9): 2709–2714. doi: https://doi.org/10.1130/0016-7606(1972)83[2709:POLFWS]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 Thirteen samples of basaltic rock from the islands of Upolu and Savai'i, Western Samoa, were analyzed for major element composition, for the minor elements Rb, Sr, and Ni, and for strontium isotopic composition. Ten high-potassium alkali basalts and three relatively potassium-rich olivine tholeiites have initial Sr87/Sr86 ratios of from 0.7051 to 0.7066. These values are among the highest yet found from within the ocean basins. The high potash contents and high Sr87/Sr86 ratios suggest that the mantle source material from which these rocks were derived has been less depleted by previous magmatism than much of the suboceanic mantle. 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.