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Asian Gold reserves DB
Hishikari Gold mine (Japan)
      paishanlou gold mine (china)
      gaolong gold mine (china)
      ..................
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اولينقبليبعديآخرين
   Hishikari Gold mine
   Hishikari is an adularia-sericite low sulphidation bonanza vein epithermal gold orebody, with one of the highest average grades of gold recorded for a large deposits. It is located approximately 30 km north of the city of Kagoshima on the island of Kyushu in southern Japan.
   In 2004 the total contained gold, both mined and in reserve, totalled 264 tonnes (8.5 Moz) comprising 3.5 Mt @ 60 to 70 g/t Au and 2 Mt @ 20 to 25 g/t Au.
  

Banded bonanza grade vein in the Hishikari Gold mine

View of mineralization on the Hishikari Gold mine
    The geology of the deposit comprises a basement sequence of Cretaceous sediments and overlying Quaternary volcanics. The concealed vein system of the ore deposit is localised by this unconformity. The Cretaceous basement is made up of shale and sandstone, with minor tuffaceous shale and chert. These sediments are heavily hematite stained for up to 20 m below the unconformity with the overlying volcanics. About 60% of the orebody is contained within these sediments which form a restricted basement high in the vicinity of the orebody. The Quaternary volcanics comprise sub-aerial deposited alternating andesites and dacites, both lavas and pyroclastics, which are calc-alkaline in composition and have magnetic susceptibilities typical of the magnetite series. They are mostly Pleistocene in age (1.6 to 0.55 Ma) and comprise 5 units, with a basal andesite and an upper-most andesite, separated by two dacite and one andesite unit. They are in turn overlain by younger pyroclastics and alluvial accumulations.
 
 
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