Key points are not available for this paper at this time.
Research Article| December 01, 1995 Volatile transport in a convecting magma column: Implications for porphyry Mo mineralization Hiroshi Shinohara; Hiroshi Shinohara 1Geological Survey of Japan, 1-1-3 Higashi, Tsukuba, 305, Japan Search for other works by this author on: GSW Google Scholar Kohei Kazahaya; Kohei Kazahaya 1Geological Survey of Japan, 1-1-3 Higashi, Tsukuba, 305, Japan Search for other works by this author on: GSW Google Scholar Jacob B. Lowenstern Jacob B. Lowenstern 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Geology (1995) 23 (12): 1091–1094. https://doi.org/10.1130/0091-7613(1995)0232.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Hiroshi Shinohara, Kohei Kazahaya, Jacob B. Lowenstern; Volatile transport in a convecting magma column: Implications for porphyry Mo mineralization. Geology 1995;; 23 (12): 1091–1094. doi: https://doi.org/10.1130/0091-7613(1995)0232.3.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 We propose that convection in a column of silicic magma allows transport of volatile components from large (>50 km3) magma chambers to the sites of shallow (≈3 km) porphyry-type Mo deposits. Using constraints from the Henderson and Pine Grove systems, we show that even at temperatures as low as 700 °C, a granitic magma with 30 vol% phenocrysts can flow through a magma column with a 150 m radius at a rate >10 km3/yr—enough magma to contribute the Mo necessary to form an ore deposit in a geologically reasonable time frame. This process requires an efficient mechanism for bubble separation at the top of the magma column to produce degassed magma that can descend down through the column. It also requires slow rates of crystallization in the silicic magma, consistent with experimental studies. Hydrothermal fluids released from the convecting magma column can explain many geologic features of the deposits. 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.
Shinohara et al. (Sun,) studied this question.