Melting experiments on lherzolite KLB-1 under hydrous conditions and generation of high-magnesian andesitic melts

Research Article| January 01, 1997 Melting experiments on lherzolite KLB-1 under hydrous conditions and generation of high-magnesian andesitic melts Kei Hirose Kei Hirose 1Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Ookayama, Tokyo 152, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information Kei Hirose 1Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Ookayama, Tokyo 152, Japan Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (1): 42–44. https://doi.org/10.1130/0091-7613(1997)025<0042:MEOLKU>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Kei Hirose; Melting experiments on lherzolite KLB-1 under hydrous conditions and generation of high-magnesian andesitic melts. Geology 1997;; 25 (1): 42–44. doi: https://doi.org/10.1130/0091-7613(1997)025<0042:MEOLKU>2.3.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 The partial melting of natural lherzolite KLB-1 at 1 GPa was studied for both H2O undersaturated and saturated conditions. The quenched glasses obtained at 1000 and 1050 °C are andesitic in composition, having 54.4–60.3 wt% SiO2, whereas partial melts formed at temperatures above 1100 °C have basaltic compositions. This suggests that high-magnesian andesites can be formed by direct partial melting of the hydrous upper mantle only at relatively low temperatures. These andesitic melts, together with those obtained at 1100 °C, contain more than 3 wt% H2O and have compositions characteristic of hydrous melts—high SiO2 and Al2O3 and low FeO*, MgO, and CaO. The results of melting studies on KLB-1 show a strong increase in the degree of melting when H2O is added to lherzolite at a given temperature. 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.