Title: Chemical differentiation of the Bishop Tuff and other high-silica magmas through crystallization processes
Abstract: Research Article| January 01, 1983 Chemical differentiation of the Bishop Tuff and other high-silica magmas through crystallization processes Peter J. Michael Peter J. Michael 1Lamont-Doherty Geological Observatory and Department of Geological Sciences, Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Geology (1983) 11 (1): 31–34. https://doi.org/10.1130/0091-7613(1983)11<31:CDOTBT>2.0.CO;2 Article history first online: 01 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 Peter J. Michael; Chemical differentiation of the Bishop Tuff and other high-silica magmas through crystallization processes. Geology 1983;; 11 (1): 31–34. doi: https://doi.org/10.1130/0091-7613(1983)11<31:CDOTBT>2.0.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 Re-examination of petrochemical data for high-silica ash-flow tuffs suggests that crystal-liquid fractionation plays a major role in the differentiation of high-silica magmas. For the high-silica Bishop Tuff, the enrichment and depletion of 27 major and trace elements correlates with the bulk crystal-liquid partition coefficients (calculated from the data of Hildreth) in ways that are consistent with crystal fractionation. Comparison of the Bishop Tuff with other high-silica tuffs and rhyolites with different compositional variations and different phenocryst assemblages shows the correspondence of chemical gradients with mineralogy. Crystal zoning studies in the Cordillera Paine granite in southern Chile suggest that the evolution of differentiated liquids similar to those in the Bishop Tuff results from crystal fractionation. The physical mechanisms of separation of liquid and crystals for the Paine granite and Bishop Tuff were quite different, however. Differentiation of the high-silica ash flows might result from advection of a less dense liquid from a crystallizing boundary into the top of the magma chamber. 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.
Publication Year: 1983
Publication Date: 1983-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 141
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