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Uploaded on:
09/03/2009 06:41:03
Type:
Digital Asset
File Size:
219.80 KB
Dimensions:
1000 x 714 pixels
1063 views 4 downloads
P number: P208019
Old photograph number: A08097
Caption: The ore processing mill, Geevor Mine, Pendeen, Cornwall.
Description: The concentrates of black tin, containing 70% of metallic tin, are taken to a store room in wooden barrows, weighed and deposited on a floor of well-laid smooth planks. The room is kept clean and dry (store). The pile of concentrates in the corner is about 7 tons. The seven tons of concentrates was worth about #1,500 at the time the photgraph was taken. Cassiterite, the tin ore has been produced in south-west England since the Bronze Age when the mineral was probably obtained entirely from gravels. Mining activity reached a peak in the second half of the nineteenth century and the remains of mining works from this and earlier periods are scattered thickly over the landscape. The three main types of workable concentrations are in fissure veins, vein swarms and alluvial (and elluvial) deposits. Fissure veins which produce by far the greatest quantities of cassiterite, are planar bodies sometimes more than 1 km. in length and depth but usually less than one metre wide. Within the narrow confines of the fissure vein the ore generally occurs in shoots.
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: 219.80 KB; 1000 x 714 pixels; 85 x 60 mm (print at 300 DPI); 265 x 189 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Economic geology/ Metalliferous mining, tin  

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