Contrasting behavior of noble-metal elements during magmatic differentiation in basalts from the Cook Islands, Polynesia

Abstract

Research Article| February 01, 2000 Contrasting behavior of noble-metal elements during magmatic differentiation in basalts from the Cook Islands, Polynesia Yoshiyuki Tatsumi; Yoshiyuki Tatsumi 1Institute for Geothermal Sciences, Kyoto University, Beppu 874-0903, Japan, and Ocean Research Institute, University of Tokyo, Tokyo 164-8639, Japan6Ocean Research Institute, University of Tokyo, Tokyo 164-8639, Japan Search for other works by this author on: GSW Google Scholar Kiwamu Oguri; Kiwamu Oguri 2School of Earth Sciences, Kyoto University, Kyoto 606-8501, Japan Search for other works by this author on: GSW Google Scholar Gen Shimoda; Gen Shimoda 1Institute for Geothermal Sciences, Kyoto University, Beppu 874-0903, Japan, and Ocean Research Institute, University of Tokyo, Tokyo 164-8639, Japan Search for other works by this author on: GSW Google Scholar Tetsu Kogiso; Tetsu Kogiso 3Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo 152-8551, Japan Search for other works by this author on: GSW Google Scholar Hans G. Barsczus Hans G. Barsczus 4GBE-CNRS-ISTEEM, Université de Montpellier II Sciences et Techniques,34095 Montpellier Cedex 5, France Search for other works by this author on: GSW Google Scholar Geology (2000) 28 (2): 131–134. https://doi.org/10.1130/0091-7613(2000)28<131:CBONED>2.0.CO;2 Article history received: 24 May 1999 rev-recd: 24 Sep 1999 accepted: 21 Oct 1999 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Yoshiyuki Tatsumi, Kiwamu Oguri, Gen Shimoda, Tetsu Kogiso, Hans G. Barsczus; Contrasting behavior of noble-metal elements during magmatic differentiation in basalts from the Cook Islands, Polynesia. Geology 2000;; 28 (2): 131–134. doi: https://doi.org/10.1130/0091-7613(2000)28<131:CBONED>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 Concentrations of noble metals (Ir, Ru, Rh, Pt, Pd, and Au) in ocean-island basalts from the Cook Islands, Polynesia, were determined by improved fire-assay and tellurium coprecipitation techniques with an inductively-coupled-plasma mass spectrometer. Isotope, major element, and trace element compositions of these basalts indicate that the present samples include distinctive HIMU (high µ = high 238U/204Pb) and normal non-HIMU basalts. Examination based on Ni-Mg-Fe partitioning between olivine and liquid suggests an only minor effect of accumulation of phenocrysts in governing the compositional variations of the present samples. The fractionation trends obtained show monotonic decrease and increase in noble-metal elements with decreasing MgO content in HIMU and non-HIMU basalts, respectively. These characteristic trends indicate that HIMU magmas are differentiated by fractional crystallization and have higher sulfide/silicate ratios than non-HIMU basalts. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.