Corundum in biotite - Sillimanite gneiss from near Polgahawela, Ceylon
By: Cooray, P.G
.
Contributor(s): Kumarapeli, P.S.
Material type: 
ArticleDescription: 480-486p ; Illustration.Subject(s): Corundum - Polgahawela - Ceylon | Petrology - Polgahawela - Ceylon | Biotite sillimanite gneiss - Ceylon
In:
Geological magazine : Vol 97 Iss. 1-6 Year. 1960Summary: Abstract
Idiomorphic, pale blue corundum crystals (S.G. =4·02, n0=1·770 ± 0·002) up to one inch long occur as porphyroblasts in a finegrained biotite-sillimanite gneiss cut by pegmatite veins at Gangoda, 5½ miles south of Polgahawela. The field relations and petrography of the corundum-bearing rocks are described briefly. The corundum is thought to have crystallized by metamorphic differentiation in alumina-rich silica-poor bands in a semipelitic gneiss.
| Item type | Current location | Collection | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|
Article
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Library and Information Centre Periodical Section | Bound Journal Collection | Not for loan | 002545_73 | ||
Serials/Scientific Journal
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Library and Information Centre Periodical Section | Bound Journal Collection | 550 GEO (Browse shelf) | Damaged | 002545 |
Abstract
Idiomorphic, pale blue corundum crystals (S.G. =4·02, n0=1·770 ± 0·002) up to one inch long occur as porphyroblasts in a finegrained biotite-sillimanite gneiss cut by pegmatite veins at Gangoda, 5½ miles south of Polgahawela. The field relations and petrography of the corundum-bearing rocks are described briefly. The corundum is thought to have crystallized by metamorphic differentiation in alumina-rich silica-poor bands in a semipelitic gneiss.
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