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Rubis australasiens
Citation
Sutherland, L and Graham, I and Harris, S and Zaw, K and Meffre, S and Coldham, T and Coenraads, R and Sutherland, G, Rubis australasiens, Revue de l'Association Française de Gemmologie, 197 pp. 13-20. ISSN 0398-9011 (2016) [Professional, Non Refereed Article]
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Abstract
Rubies occur in sporadic deposits across the continental exposures of Australiasia, although quite subordinate to sapphires, which
are actively mined in a few gem fields. The main ruby finds are in alluvial placer deposits shed from Cenozoic basalt fields in
eastern Australia, where corundum was brought up by eruptions as resistant crystals from underlying crustal and mantle sources.
These rubies all show differences in inclusions, trace element signatures and oxygen isotope values reflecting origins from diverse
metamorphic bodies. Barrington Tops rubies show intergrowths with sapphirine and Cr-bearing spinel and supplied a ruby mining
venture. Cudgegong-Macquarie River Mg-rich high temperature rubies may represent diamond zone indicators. New England
zoned rubies are unusual Ga-rich types, different to most rubies in general. Elsewhere, in central and western Australia, a few ruby
finds are known in older metamorphic rocks. At Harts Range, ruby crystals in feldspathic lenses within deformed metamorphic
schists and gneisses were worlced for cabochon and specimen material. At Holcitilca, South Island New Zealand, a unique rubyrich
metamorphic rock is worlced for ornamental jewellery. Commercial ruby deposits are very limited in Australasia, however, the
known ruby finds provide a scientific 'bonanza'.
Item Details
Item Type: | Professional, Non Refereed Article |
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Keywords: | Ruby |
Research Division: | Earth Sciences |
Research Group: | Geology |
Research Field: | Mineralogy and Crystallography |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding Knowledge |
Objective Field: | Expanding Knowledge in the Earth Sciences |
UTAS Author: | Zaw, K (Professor Khin Zaw) |
UTAS Author: | Meffre, S (Dr Sebastien Meffre) |
ID Code: | 112424 |
Year Published: | 2016 |
Deposited By: | CODES ARC |
Deposited On: | 2016-11-09 |
Last Modified: | 2016-11-11 |
Downloads: | 1 View Download Statistics |
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