- The Ohra-Takamine project lies within the Hokusatsu-Kushikino mining district, 7.5 kilometres to the southwest of the historic Yamagano mine which produced 910,000 ounces of gold at a grade of 17.4 g/t. Within the property historical production included the Ohra (27K oz gold), Takamine-Urushi (13K oz gold) and Takamine (1.6K oz gold) mines. Vein number 2 of the Takamine-Urushi mine was reported to carry gold grades between 50-100 g/t1,2.
- Other notable gold producers within the district include: Hishikari mine with 7.6 million ounces produced to date at average grades of 30-40 g/t7; Kushikino mine, 1.8 million ounces at 6.7 g/t; Yamagano mine, 910,000 ounces at 17.4 g/t; and the Ohkuchi mine with 714,000 ounces at 13.6 g/t4,8.
- The presence of sinter at several localities indicates the fossil geothermal system is well preserved and with known surface/near surface mineralization, represents a significant exploration target for shallow-level epithermal gold-silver deposits.
- Like all of the major gold mines in the Hokusatsu-Kushikino mining district, the Ohra-Takamine project straddles the margin of a gravity-high feature inferred to indicate upward doming of the basement which produced suitable fracture pathways for mineralised hydrothermal fluid flow.
