Solidus of alkaline carbonatite in the deep mantle

Abstract

Research Article| January 01, 2013 Solidus of alkaline carbonatite in the deep mantle Konstantin D. Litasov; Konstantin D. Litasov 1Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan2V.S. Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk 630090, Russia Search for other works by this author on: GSW Google Scholar Anton Shatskiy; Anton Shatskiy 1Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan2V.S. Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk 630090, Russia Search for other works by this author on: GSW Google Scholar Eiji Ohtani; Eiji Ohtani 1Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan Search for other works by this author on: GSW Google Scholar Gregory M. Yaxley Gregory M. Yaxley 3Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia Search for other works by this author on: GSW Google Scholar Geology (2013) 41 (1): 79–82. https://doi.org/10.1130/G33488.1 Article history received: 04 Apr 2012 rev-recd: 02 Jul 2012 accepted: 22 Jul 2012 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, Anton Shatskiy, Eiji Ohtani, Gregory M. Yaxley; Solidus of alkaline carbonatite in the deep mantle. Geology 2013;; 41 (1): 79–82. doi: https://doi.org/10.1130/G33488.1 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 Minor amounts of alkalies (Na and K) can reduce drastically the solidus temperatures of carbonated silicate mantle, by as much as 400–500 °C. Low-degree melting of carbonated peridotite and eclogite at pressures of 3–10 GPa produces Na- and K-bearing carbonatite melt. Mass-balance calculations of samples obtained below apparent solidi show clear deficits of alkalies, suggesting the presence of minor alkali-rich liquid or solid carbonate phases. Here we determine the true solidi in Na- and K-bearing carbonate systems and report the stability of alkaline carbonate phases. Melting of subducting alkaline carbonates would likely occur at transition zone depths to produce mobile carbonatite melt diapirs that migrate upward, modifying and oxidizing the upper mantle and initiating volcanism at the surface. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.