2026-06-28T20:10:47Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/521192024-07-23T16:39:08Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Luque Del Villar, Francisco Javier
author
Ortega Menor, Lorena
author
Barrenechea, José F.
author
Millward, David
author
Beyssac, Olivier
author
Huizenga, Jan-Marten
2023-06-20T12:39:49Z
2023-06-20T12:39:49Z
2009
0091-7613
10.1130/G25284A.1
https://hdl.handle.net/20.500.14352/52119
http://geology.geoscienceworld.org/archive/
Recognized large occurrences of fl uid-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 XCO2/(XCO2 + XCH4) ratio of 0.69, thus indicating temperatures of ~500 °C at the fayalite-magnetite-quartz buffered conditions. Therefore, this is the fi rst reported evidence indicating that huge concentrations of highly crystalline graphite can precipitate from moderate-temperature fluids.
eng
Deposition of highly crystalline graphite from moderate-temperature fluids
journal article
URL
https://docta.ucm.es/bitstreams/fe69a05f-ee1d-4659-bb36-829029f7549e/download
File
MD5
86d9e16a3ec2d2fbd7ec37bd84505b0f
166199
application/pdf
12 2009-Luque et al. Geology - Grafito baja T1.pdf
URL
https://docta.ucm.es/bitstreams/1cf187ee-c46b-4e20-804d-3ed5bc5c02b0/download
File
MD5
c0bc48464b1df77b0c9f8b2bc06cfd51
29773
text/plain
12 2009-Luque et al. Geology - Grafito baja T1.pdf.txt