File:Lineated tourmalinite with argentiferous galena (silver ore), Broken Hill NSW.jpg
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| Description |
Lineated tourmalinite (black) with argentiferous galena (silvery-white) & minor chalcopyrite and pyrite (both brassy gold) (field of view ~3.6 cm across) from the Umberumberka Mine in New South Wales, Australia. Tourmalinite is an uncommon metamorphic rock dominated by finely crystalline tourmaline. The photos here are of a black-colored, lineated tourmalinite from the Broken Hill Block of New South Wales, Australia. The tourmalinite has been broken, folded, and intruded by an irregularly-shaped hydrothermal vein mass of argentiferous galena ((Pb,Ag)S - lead silver sulfide). The silver content is high enough to make this rock a silver ore. The rock is way more awesome than the photos suggest. It’s one of my favorite rocks. Locality: subsurface sample from the Umberumberka Mine (~31° 53’ 37” South, ~141° 11’ 26” East), 2-3 km west of the town of Silverton, WNW of Broken Hill, Broken Hill Block, far-western New South Wales, southeastern Australia. Stratigraphy: Umberumberka Lode (“Main Lode”) intruding the Willyama Supergroup, upper Paleoproterozoic. Metamorphic age: high-grade metamorphic events affected rocks of this area at ~1660 m.y. and ~1599-1600 m.y. Age of hydrothermal Ag-galena vein emplacement: possibly at ~510-520 m.y., Early to Middle Cambrian. |
| Date | |
| Source | Lineated tourmalinite with argentiferous galena (silver ore) (Umberumberka Lode intruding the Willyama Supergroup, Proterozoic metamorphism, Cambrian vein emplacement; Umberumberka Mine, west of Silverton, Broken Hill Block, far-western New South Wales, s |
| Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15098153672. It was reviewed on 7 September 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 21:29, 7 September 2014 | | 2,434 × 1,945 (1.66 MB) | Tillman (talk | contribs) | Transferred from Flickr via Flickr2commons |
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