Please use this identifier to cite or link to this item: http://ir.lib.seu.ac.lk/handle/123456789/1687
Title: Use of Crystal Morphologies to Unravel the Origin of Vein Graphite in Sri Lanka
Authors: H.P.T.S. Hewathilake, N.W.B. Balasooriya, H.M.T.G.A. Pitawala and H.W.M.A.C. Wijayasinghe
Keywords: vein graphite, crystal morphology, hydrothermal activity
Issue Date: 26-Feb-2016
Publisher: Geological Society of Sri Lanka
Abstract: Sri Lanka is well known for high quality vein graphite with extensive mineralization and large reserves. Many scientists have provided their tremendous efforts to discuss the origin of Sri Lankan vein graphite, but still it is controversial. However, recent investigations have proved that Sri Lankan vein graphite has a distinctly different structural variation. Nevertheless the relationship between the structural variations and the formation of vein graphite has not been studied yet. Therefore, this study focuses on the formation of Sri Lankan vein graphite, combining with the hydrothermal activities, crystallization process and crystal morphologies. Two major veins expose at the deeper levels and shallow levels, at the Kahatagaha – Kolongaha mine were selected for this study. SEM, XRD and purity analysis (ASTM – 561) have evidenced that, temperature, pressure gradient and influence of the impurity elements movement caused for the crystallization of different morphological layers with different purity, chemistry and crystallinity in a single vein.
URI: http://ir.lib.seu.ac.lk/handle/123456789/1687
ISSN: 1391-3786
Appears in Collections:Research Articles

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