Lithocap/Porphyries

All historical drilling, sampling and production data in this section of the website was found in the Metal Mining Agency of Japan database.

Japan Gold has four projects (9,332 hectares) in Hokkaido and northern Honshu targeting areas of gold-bearing advanced argillic alteration lithocaps, which could indicate the presence of porphyry mineralization. The projects, Ponkutosan, Kobui, Minamikyabe and Eboshi, and are distributed along a clear north-south trend of lithocap mineralization.

The 19 prospecting rights applications (6,252 hectares) covering Ponkutosan, Kobui, Minamikyabe have been accepted for further government review. This reserves the ground for Japan Gold and allows for surface forms of exploration such as mapping, geochemical sampling and geophysics. 

The 9 prospecting rights applications (3,080 hectares) at the Eboshi Project in northern Honshu have been granted as Prospecting Rights. 

japan_highway-...-northjapan_deposits_rectified Map

The Eboshi Project

All nine applications at The Eboshi Project have been granted as Prospecting Rights. The project comprises 3,080 hectares with an extensive area of advanced argillic alteration mapped over 6 km2. Eboshi lies adjacent to the Osorezan volcanic complex, which is 50 km to the north. Osorezan is a very significant geological site and active thermal area where gold is currently depositing at surface at grades of 10,000 g/t gold. The Metal Mining Agency of Japan conducted some exploration of the area, but drilling appears to be located peripheral to the main advanced argillic alteration area, intersecting several narrow > 0.1 g/t gold zones. Residual-vuggy silica in the application area has late native sulphur deposition, and the surrounding geology hosts strong pyritic clay alteration in andesites and volcanic breccias, including the historical Eboshi pyrite mine.

The Ponkutosan Project

The Ponkutosan Project comprises five accepted applications (1,620 hectares) covering an extensive area of advanced argillic alteration. The Metal Mining Agency of Japan mapped a silica-alunite alteration area near the Ponkutosan Project and sampled 32 metres at 1.3 g/t gold. Creek float 1.7 km downstream from Japan Gold’s application area is dominated by quartz-alunite, residual silica and other silica-pyrite alteration.

The Kobui Project

The Kobui Project comprises eight accepted applications (2,738 hectares) covering an extensive advanced argillic alteration zone, including a wide area of gold in silica at levels above 0.1 g/t gold. Areas of advanced argillic alteration are surrounded by occurrences of gold, copper, zinc, lead and molybdenum, indicating a very active and well mineralized system.

The Minamikyabe Project

The Minamikyabe Project comprises six accepted applications (1,943 hectares) covering an extensive advanced argillic alteration zone with areas of lower temperature massive silica. The Metal Mining Agency of Japan drilled a hole at the edge of Japan Gold’s application area with a 200 metre intersection of gold at +0.2 g/t levels. Base and precious metal occurrences surround the application area. High-grade quartz-adularia veins were drilled by the Metal Mining Agency of Japan in the Hokko Mine area, and deep geothermal exploration drilling north of the application intersected copper, gold and molybdenum mineralization.