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High-sulfur magma, a product of fluid discharge from underlying mafic magma: Evidence from Mount Pinatubo, Philippines

1993; Geological Society of America; Volume: 21; Issue: 12 Linguagem: Inglês

10.1130/0091-7613(1993)021 2.3.co;2

1943-2682

Kéiko Hattori,

High-pressure geophysics and materials

Research Article| December 01, 1993 High-sulfur magma, a product of fluid discharge from underlying mafic magma: Evidence from Mount Pinatubo, Philippines Keiko Hattori Keiko Hattori 1Ottawa-Carleton Geoscience Centre, and Department of Geology, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada Search for other works by this author on: GSW Google Scholar Geology (1993) 21 (12): 1083–1086. https://doi.org/10.1130/0091-7613(1993)021 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 MailTo Tools Icon Tools Get Permissions Search Site Citation Keiko Hattori; High-sulfur magma, a product of fluid discharge from underlying mafic magma: Evidence from Mount Pinatubo, Philippines. Geology 1993;; 21 (12): 1083–1086. doi: https://doi.org/10.1130/0091-7613(1993)021 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 Beneath Mount Pinatubo in the Philippines, a hot mafic melt ascended, releasing supercritical fluids rich in SO2into an overlying semisolidified dacitic magma. The SO2 was reduced to H2S in the cool, wet dacite, causing oxidation of this magma. H2S thus formed was initially precipitated in the dacite as sulfides, which were high in Cu, Cd, Zn, and Se/S, elements also introduced by the fluids. Continued influx of SO2 and oxidation of the dacite led to an increase in the S solubility of the melt, causing partial resorption of sulfide minerals. Further addition of SO2 then led to excess S, which, in part, was precipitated as anhydrite. High S contents and the oxidized nature of the eruption products were due to the conjunction of an overlying, cool dacitic magma and ascending hot mafic melt. The 1982 eruption products of El Chichón (Mexico) and those from the 1985 eruption of Nevado del Ruiz (Colombia) have features similar to Pinatubo, suggesting that these high-S magmas may have formed by a similar process. 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.