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Vein graphite from the Bogala and Kahatagaha-Kolongaha mines, Sri Lanka; a possible origin

Philippe Touzain, Nanda Balasooriya, Kumara Bandaranayake and Chantal Descolas-Gros
Vein graphite from the Bogala and Kahatagaha-Kolongaha mines, Sri Lanka; a possible origin
The Canadian Mineralogist (December 2010) 48 (6): 1373-1384

Abstract

We report results on the physicochemical attributes and geological context of vein graphite from the Bogala and Kahatagaha-Kolongaha mines, Sri Lanka, according to their morphology and texture. Each type has been characterized with means of X-ray diffraction, Raman spectrometry, oxyreactive and differential thermoanalysis, and measurements of the ratio of the carbon isotopes, (super 13) C/ (super 12) C. The carbon isotopic data for the Bogala graphite, expressed as delta (super 13) C, are in the range of -8.3 and -10.4 per mil, and the data for the Kahatagaha-Kolongaha graphite are in the range of -7.9 and -9.3 per mil. These values of delta (super 13) C values are not consistent with graphite mineralization due to granulite metamorphism, but rather with a magmatic origin. In a single vein of Bogala graphite, we can observe successive morphologies from the wallrock to the central part of the vein. In this textural transition, the delta (super 13) C decreases as the carbon content increases from 93 to 98%.


ISSN: 0008-4476
EISSN: 1499-1276
Coden: CAMIA6
Serial Title: The Canadian Mineralogist
Serial Volume: 48
Serial Issue: 6
Title: Vein graphite from the Bogala and Kahatagaha-Kolongaha mines, Sri Lanka; a possible origin
Affiliation: INPG, ENSEEG, Laboratoire d'Electrochimie et de Physicochimie des Materiaux et Interfaces, St. Martin d'Heres, France
Pages: 1373-1384
Published: 201012
Text Language: English
Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada
References: 54
Accession Number: 2011-022489
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
N06°00'00" - N10°00'00", E79°00'00" - E82°30'00"
Secondary Affiliation: University of Peradeniya, LKA, Sri LankaUniversite de Montpellier II, FRA, France
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Association of Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201113
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