Origin of Cl-bearing silica-rich melt inclusions in diamonds: Experimental evidence for an eclogite connection

Abstract

Research Article| December 01, 2010 Origin of Cl-bearing silica-rich melt inclusions in diamonds: Experimental evidence for an eclogite connection Konstantin D. Litasov; Konstantin D. Litasov 1Department of Earth and Planetary Material Science, Faculty of Science, Tohoku University, Sendai 980-8578, Japan2V.S. Sobolev Institute of Geology and Mineralogy, SB RAS (Siberian Branch, Russian Academy of Sciences), Novosibirsk 630090, Russia Search for other works by this author on: GSW Google Scholar Oleg G. Safonov; Oleg G. Safonov 3Institute of Experimental Mineralogy RAS (Russian Academy of Sciences), Chernogolovka 142432, Russia Search for other works by this author on: GSW Google Scholar Eiji Ohtani Eiji Ohtani 1Department of Earth and Planetary Material Science, Faculty of Science, Tohoku University, Sendai 980-8578, Japan Search for other works by this author on: GSW Google Scholar Geology (2010) 38 (12): 1131–1134. https://doi.org/10.1130/G31325.1 Article history received: 22 Apr 2010 rev-recd: 19 Jul 2010 accepted: 22 Jul 2010 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Konstantin D. Litasov, Oleg G. Safonov, Eiji Ohtani; Origin of Cl-bearing silica-rich melt inclusions in diamonds: Experimental evidence for an eclogite connection. Geology 2010;; 38 (12): 1131–1134. doi: https://doi.org/10.1130/G31325.1 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 Melting phase relations of a model chloride- and carbonate-bearing eclogite have been studied at 7.0–10.5 GPa and 1200–1675 °C. The mineral assemblage coexisting with partial melts is garnet, omphacite, kyanite, and coesite or stishovite. At temperatures of 1200–1400 °C, the partial melt has an SiO2-poor, Cl-bearing carbonatite composition. With increasing temperature, it becomes progressively SiO2 rich, and at temperatures of 1500–1700 °C contains as much as 53 wt% SiO2. The compositions of the melts are comparable with those of silicic end members of inclusions in fibrous and/or cloudy diamonds worldwide, implying that they may be produced via chemical reactions of alkalic chloride-carbonate liquids with mantle eclogites. Our experiments reproduced the trends of the compositional variations of the fluid or melt inclusions within eclogitic diamonds, and thus suggest a reliable model for their origin. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.