Geological and microstructural study of Vein graphite in Sri Lanka

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dc.contributor.authorBalasooriya, N. W. B.
dc.contributor.authorBandaranayake, P. W. S. K.
dc.contributor.authorBandara, H. M. N.
dc.contributor.authorDahanyake, K.
dc.contributor.authorDissanayake, M. A. K. L.
dc.date.accessioned2024-03-25T10:21:54Z
dc.date.available2024-03-25T10:21:54Z
dc.date.issued1998-11-07
dc.description.abstractGraphite deposits in nature occur mainly as amorphous, flake or vein graphite. Sri Lanka has reputation for its high quality vein graphite. Currently, there are only two graphite mines operating at Bogala and Kahatagaha-Kolongaha areas. This study was carried out using samples collected from Bogala and Kahatagaha mines. The vein graphite (high crystalline) is formed in fissures, fractures or cavities traversing igneous or metamorphic rocks such as charnockite, garnet-biotite gneiss, marble, quatzite and calc gneiss. However marble is very rare in Kahatagaha graphite mine. In the Kahatagaha mine, veins are usually less than a meter in thickness and those of Bogala mines range for a few centimeters to several meters. Mineralisation is concentrated in the zones of fractures of the overlying rocks. Alterations occur within some minerals formed in the vicinity of the wall rock. Some veins in Bogala and Kahatagaha mines indicated several episodes of mineralisation. The gangue minerals observed in graphite veins of both mines are quartz, feldspar, chalcopyrite, pyrite whereas secondary minerals are chlorite, calcite etc. Microstructures associated with different types of graphite were examined using JOEL JSM- T 220A Scanning Electron Microscope (SEM). The SEM studies showed that graphite occurs as aggregates of micro fibrous and micro sheets.
dc.identifier.citationProceedings & Abstracts of the Annual Research Sessions 1998, University of Peradeniya, Peradeniya, Sri Lanka, pp.96
dc.identifier.issn1391-4111
dc.identifier.urihttps://ir.lib.pdn.ac.lk/handle/20.500.14444/239
dc.language.isoen_US
dc.publisherUniversity of Peradeniya
dc.subjectGeological study
dc.subjectMicrostructural study
dc.subjectVein graphite
dc.subjectPhysical sciences engineering and technology
dc.titleGeological and microstructural study of Vein graphite in Sri Lanka
dc.typeArticle
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