HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Research Units >
21st Century COE Program, Neo-Science of Natural History - Origin and Evolution of Natural Diversity >
Neo-Science of Natural History : Integration of Geoscience and Biodiversity Studies >
Proceedings >

Study of Macroscopic and Microscopic Reaction Textures Associated with Corundum of Balangoda Region, Sri Lanka

Files in This Item:
p129-136-neo-science.pdf1.94 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/38517

Title: Study of Macroscopic and Microscopic Reaction Textures Associated with Corundum of Balangoda Region, Sri Lanka
Authors: Francis, Muttarachchige D.P.L. Browse this author
Matsueda, Hiroharu Browse this author
Keywords: Reaction textures
Corundum
Calc-silicate
Granulite
Mineralization
Issue Date: 2004
Publisher: Graduate School of Science, Hokkaido University
Citation: Edited by Shunsuke F. Mawatari, Hisatake Okada.
Journal Title: Neo-Science of Natural History: Integration of Geoscience and Biodiversity Studies : Proceedings of International Symposium on "Dawn of a New Natural History - Integration of Geoscience and Biodiversity Studies" March 5-6, 2004, Sapporo
Start Page: 129
End Page: 136
Abstract: Corundum is the most sought after gem variety among Sri Lankan gem minerals. Locations of most of the gem quality stones were identified as alluvial. The in-situ corundums rarely show a gem quality and are mostly associated with macroscopic and microscopic reaction textures. Studies of these textures, associated reactants and the intrusion of corundum by reaction products using electron probe microanalysis and energy dispersive x-ray analysis reveal that hydrous minerals such as phlogopite mica play an important role in promoting such reactions. Because of these reactions corundum is likely to be fractured and the fractures are often filled with reaction products. Hence the gem quality is not retained in most corundum after their formation. Also the natural shielding effect, called plagioclase shielding that protects corundum against the retrograde reactions, is found to be responsible for the production of valuable gem quality stones.
Description: International Symposium on "Dawn of a New Natural History - Integration of Geoscience and Biodiversity Studies". 5-6 March 2004. Sapporo, Japan.
Conference Name: International Symposium on "Dawn of a New Natural History : Integration of Geoscience and Biodiversity Studies"
Conference Place: Sapporo
Type: proceedings
URI: http://hdl.handle.net/2115/38517
Appears in Collections:Neo-Science of Natural History : Integration of Geoscience and Biodiversity Studies > Proceedings

Export metadata:

OAI-PMH ( junii2 , jpcoar )


 

Feedback - Hokkaido University