File:Carbon Leader Gold Ore, South Africa 3.jpg
Original file (1,396 × 1,219 pixels, file size: 254 KB, MIME type: image/jpeg)
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| Description |
Carbon Leader Gold Ore with gold (Au) and uraninite (UO2) (black). This rock is quite radioactive. The Witwatersrand area of South Africa produces a significant percentage of the world's gold. This is a spectacular sample of Precambrian high-grade gold ore from South Africa’s Blyvooruitzicht Gold Mine. The rock is from the Carbon Leader (also known as the Carbon Leader Reef & Carbon Leader Seam), a blackened, hydrocarbon-rich stromatolitic interval richly impregnated with native gold (Au) and radioactive uraninite/pitchblende (UO2). This is a paleoplacer deposit, part of an ancient alluvial fan succession. Stratigraphy & Age: Carbon Leader Member, Main Conglomerate, lower Johannesburg Subgroup, lower Central Rand Group, Witwatersrand Supergroup, lower Neoarchean, ~2.9 billion years old. Locality: Blyvooruitzicht Gold Mine, Carletonville Goldfield, West Witwatersrand (“West Wits”), South Africa. |
| Date | |
| Source | Auriferous, uraninitic, hydrocarbon-rich stromatolite rock (Carbon Leader Gold Ore, South Africa) 3 |
| Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/14533130120. It was reviewed on 1 August 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:30, 30 July 2014 | | 1,396 × 1,219 (254 KB) | Tillman | Transferred from Flickr via Flickr2commons |
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