| P number: | P527916 |
|---|---|
| Caption: | Galena from the Leadhills - Wanlockhead mining district, Lanarkshire, Dumfriesshire. |
| Description: | Galena from the Leadhills - Wanlockhead area. Galena is the principal lead ore in the district. It occurs as massive coarse-grained crystalline aggregates and occasionally as fine-grained 'steel ore'. British Geological Survey Petrology Collection sample number MC 7692. The chemical composition of galena is lead sulphide. It belongs to the cubic crystal system and has a low hardness of between 2.5 and 2.8 on Moh's scale and a high specific gravity of 7.2 to 7.6 i.e. it will feel very 'heavy'. Almost all the veins in the area contain galena, most contain sphalerite (zinc-blende) the other primary ore. All other minerals are primary accessory ores such as chalcopyrite, pyrites and jamesonite, secondary ores as reduction products, secondary accessory ores as the result of oxidation and the gangue minerals that have no economic value. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 162.72 KB; 1000 x 702 pixels; 85 x 59 mm (print at 300 DPI); 265 x 186 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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