Platina Resources has confirmed significant intersections of high-grade zinc mineralisation at its Blue Moon zinc-copper-gold project in the United States following the completion of its drilling programme.
Diamond drilling intersected the highest zinc interval at the project to date, 1.71m at 51.9% zinc, 1.49% copper, 0.05% lead, 0.85 g/t gold and 31.9 g/t silver from 414.65m as well as the following intervals:
- 7.47m at 25.55% zinc, 0.87% copper, 0.68 g/t gold and 17 g/t silver from 412.81m, including:
- 3.05m at 49.60 % zinc, 1.39% copper, 0.91 g/t gold and 30 g/t silver from 414.65m. A second zone of zinc mineralisation in the same hole from 450m, included:
- 10.96m at 3.11% zinc, 0.47 % copper and 0.27% lead from 450.37m, including:
- 2.08m at 4.22% zinc from 457.16m. These intervals are 50m above the high-grade mineralisation intersected by a previous diamond hole drilled in 2018. This extends the zone of high-grade mineralisation within the main mineralised horizon. Interesting anomalies of gold and silver were also intersected
The Blue Moon deposit is a Kuroko-type, polymetallic, volcanogenic, massive sulphide (VMS) deposit.
The deposit is hosted in a rhyolite strata up to 300m thick which is part of the Gopher Ridge Formation consisting of a basal sequence of basalt and andesite. The sulphide-sulphate mineralised lenses are hosted in the lower part of the felsic sequence.
The felsic volcanic rocks are succeeded to the east by volcaniclasc rocks and ultimately by deep-water argillaceous, sedimentary rocks. Strata at Blue Moon strike approximately 20° west of north, dip near vertically, face to the east and are lightly folded. Lithologies observed at Blue Moon exhibit low grade metamorphism characteristics of the lower greenschist facies.
The ore minerals are pyrite, sphalerite, chalcopyrite, galena, and minor tetrahedrite and bornite. To date, four lenses of zinc/copper mineralisation have been defined within at least two, possibly three horizons. The deposit also contains gold and silver.