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Uploaded on:
09/03/2009 06:38:52
Type:
Digital Asset
File Size:
280.76 KB
Dimensions:
1000 x 700 pixels
1042 views 4 downloads
P number: P208014
Old photograph number: A08092
Caption: The mill, Geevor Mine, Pendeen, Cornwall.
Description: The mill is where the ore is processed to reduce the size of the fragments and to start separating out the ore from the gangue minerals. From the storage bin the ore is fed by endless drag-chain belt (top left) to inclined, 24-mesh, vibrating screens (left) under water jets. The material passing over the screens enters the 7-feet diameter ball mill (centre), and the discharge from this with the undersize from the screens, all under 24-mesh sieve size, passes to the concentrating plant, consisting mainly of tables and vanners. Metalliferous minerals have been exploited in the Penzance district since the Bronze-Age when tin and copper ores were worked to make bronze weapons and utensils. The earliest tin workings were in cassiterite-bearing alluvial sands and gravels.
Date taken: 01/08/1945
Photographer: Rhodes, J.
Copyright statement: Crown
X longitude/easting: 137500
Y latitude/northing: 34500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 280.76 KB; 1000 x 700 pixels; 85 x 59 mm (print at 300 DPI); 265 x 185 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Economic geology/ Metalliferous mining, tin  

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