Sutherland, F. L., Coenraads, R. R., Schwarz, D., Raynor, L. R., Barron, B. J., Webb, G. B. (2003) Al-rich diopside in alluvial ruby and corundum-bearing xenoliths, Australian and SE Asian basalt fields. Mineralogical Magazine, 67 (4) 717-732 doi:10.1180/0026461036740129
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Al-rich diopside in alluvial ruby and corundum-bearing xenoliths, Australian and SE Asian basalt fields | ||
| Journal | Mineralogical Magazine | ||
| Authors | Sutherland, F. L. | Author | |
| Coenraads, R. R. | Author | ||
| Schwarz, D. | Author | ||
| Raynor, L. R. | Author | ||
| Barron, B. J. | Author | ||
| Webb, G. B. | Author | ||
| Year | 2003 (August) | Volume | 67 |
| Issue | 4 | ||
| Publisher | Mineralogical Society | ||
| DOI | doi:10.1180/0026461036740129Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 243459 | Long-form Identifier | mindat:1:5:243459:3 |
| GUID | 0 | ||
| Full Reference | Sutherland, F. L., Coenraads, R. R., Schwarz, D., Raynor, L. R., Barron, B. J., Webb, G. B. (2003) Al-rich diopside in alluvial ruby and corundum-bearing xenoliths, Australian and SE Asian basalt fields. Mineralogical Magazine, 67 (4) 717-732 doi:10.1180/0026461036740129 | ||
| Plain Text | Sutherland, F. L., Coenraads, R. R., Schwarz, D., Raynor, L. R., Barron, B. J., Webb, G. B. (2003) Al-rich diopside in alluvial ruby and corundum-bearing xenoliths, Australian and SE Asian basalt fields. Mineralogical Magazine, 67 (4) 717-732 doi:10.1180/0026461036740129 | ||
| Abstract/Notes | AbstractAlluvial rubies and sapphires are found in palaeodrainage deposits along the Cudgegong-Macquarie River system, central eastern New South Wales, Australia. A pink to red suite contains Cr (up to 0.6 wt.% Cr2O3) as the main chromophore, exceeding Fe (up to 0.5 wt.%Fe2O3). Corrosive etching suggests a prior xenocrystic Mesozoic-Cenozoic basaltic transport, while Cr2O3/Ga2O3to Fe2O3/TiO2ratios indicate an original metamorphic source. Syngenetic mineral inclusions include Al-rich diopside, meionite and anatase. The Al-rich diopside (‘fassaite’) contains extremely high Al2O3(20–21 wt.%). A blue-green suite contains Fe (up to 0.8 wt.% Fe2O3) as a dominant chromophore, while a rare nepheline-anorthoclase composite inclusion supports a magmatic phonolitic origin. The Cudgegong- Macquarie ruby formation is compared with a garnet granulite origin proposed for Thailand rubies and a xenolith of corundum-bearing garnet granulite from Ruby Hill, Bingara, Australia. Clinopyroxenecorundum thermometry suggests the Cudgegong-Macquarie rubies formed atT>1000–1300ºC, a high equilibrationTfor proposed lithospheric granulites. These rubies form a distinctive suite compared to other rubies from Australian and SE Asian basalt fields, but have some similarities with eastern Thailand rubies. | ||
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