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Shaida Copper Mine : ウィキペディア英語版 | Shaida Copper Mine
From 1971 to 1972, Soviet exploration work was carried out on the extent of the mine. Additional work was carried out by USGS in 2005 including airborne surveys, hyperspectral surveys and analysis, and the compilation of prior data into a GIS database. The USGS reports that in the larger USGS defined Dusar-Shaida Area of Interest, there has been some mining. However, there is no known historic production from the Shaida licence area. ==Geology== Shaida’s mineralisation has been described as a porphyry copper deposit. During the exploration continuous drilled intervals of mineralisation were identified, with copper grades between 0.10 to 0.80%, with drilled intervals ranging from 0.80 to 17.95m. Cross sections of drilling at the Shaida prospect show layered quartz plagioclase porphyry, quartz keratophyre and aleuropelites (siltstone or mudstone) interbedded with volcanic layers.
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