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Deposition of highly crystalline graphite from moderate-temperature fluids

2009; Geological Society of America; Volume: 37; Issue: 3 Linguagem: Inglês

10.1130/g25284a.1

1943-2682

Francisco Javier Luque del Villar, Lorena Ortega Menor, José F. Barrenechea, D. Millward, Olivier Beyssac, Jan Marten Huizenga,

High-pressure geophysics and materials

Research Article| March 01, 2009 Deposition of highly crystalline graphite from moderate-temperature fluids F.J. Luque; F.J. Luque * 11Departamento de Cristalografía y Mineralogía, Facultad de Geología, Universidad Complutense de Madrid, 28040 Madrid, Spain *E-mail: jluque@geo.ucm.es. Search for other works by this author on: GSW Google Scholar L. Ortega; L. Ortega 11Departamento de Cristalografía y Mineralogía, Facultad de Geología, Universidad Complutense de Madrid, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar J.F. Barrenechea; J.F. Barrenechea 11Departamento de Cristalografía y Mineralogía, Facultad de Geología, Universidad Complutense de Madrid, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar D. Millward; D. Millward 22British Geological Survey, Murchison House, West Mains Road, Edinburgh EH9 3LA, UK Search for other works by this author on: GSW Google Scholar O. Beyssac; O. Beyssac 33Laboratoire de Géologie, CNRS, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France Search for other works by this author on: GSW Google Scholar J-M. Huizenga J-M. Huizenga 44Department of Geology, University of Johannesburg, P.O. Box 524, Auckland Park 2006, University and Kingsway (Auckland Park Kingsway Campus), Johannesburg, South Africa Search for other works by this author on: GSW Google Scholar Geology (2009) 37 (3): 275–278. https://doi.org/10.1130/G25284A.1 Article history received: 26 Jun 2008 rev-recd: 04 Nov 2008 accepted: 06 Nov 2008 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation F.J. Luque, L. Ortega, J.F. Barrenechea, D. Millward, O. Beyssac, J-M. Huizenga; Deposition of highly crystalline graphite from moderate-temperature fluids. Geology 2009;; 37 (3): 275–278. doi: https://doi.org/10.1130/G25284A.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 Recognized large occurrences of fluid-deposited graphite displaying high crystallinity were previously restricted to high-temperature environments (mainly granulite facies terranes). However, in the extensively mined Borrowdale deposit (UK), the mineralogical assemblage, notably the graphite-epidote intergrowths, shows that fully ordered graphite precipitated during the propylitic hydrothermal alteration of the volcanic host rocks. Fluids responsible for graphite deposition had an average X CO2/(XCO2 + X CH4) ratio of 0.69, thus indicating temperatures of ~500 °C at the fayalite-magnetite-quartz buffered conditions. Therefore, this is the first reported evidence indicating that huge concentrations of highly crystalline graphite can precipitate from moderate-temperature fluids. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.