Prismo Metals (CSE:PRIZ) has returned ‘high-grade’ copper and silver results from reconnaissance sampling at its Silver King Project in central Arizona.
The company collected 23 rock samples during fieldwork, with results showing highs of 1.73% copper, 1,362 grams per tonne silver, 4.10% lead, 1.30g/t gold, and 30 parts per million molybdenum.
Fieldwork completed 50% of planned reconnaissance geological mapping and sampling, progressing westward toward the central Silver King shaft.
The work outlined a surface pyrite halo measuring at least 2.0km by 1.5km within a 74.5-million-year-old quartz diorite intrusive.
Prismo also discovered previously unmapped hydrothermal breccias in Silverado Wash containing pyrite, chalcopyrite, and copper oxides.
Grab samples from historic shafts suggest increasing alteration intensity at depth, consistent with a mineralising porphyry source.
According to Prismo, a strongly altered rock fragment transported vertically upward hints that intense alteration exists at depth.
Induced polarisation geophysics likewise confirmed the field-mapped pyrite halo and indicates an increasing sulphide response at 225m depth.
The Silver King Project sits 3.4km from Rio Tinto (ASX:RIO) and BHP‘s (ASX:BHP) Resolution copper deposit in Arizona’s Superior district.
The historic Silver King mine reportedly yielded nearly 6 million ounces of silver at grades up to 61 ounces per tonne after its 1875 discovery.
Prismo plans to complete continuing field evaluations, deeper-penetrating geophysics, and design phase two drilling targeting the copper porphyry system.
Prismo Metals is a mineral explorer focused on advancing its projects in Mexico and the US.
Write to Paula Fabe at Mining.com.au
Images: Prismo Metals
