Copperstone’s Boleo copper-gold project is taking shape in Mexico

With more than 3,000 metres of a planned 4,000-metre winter drill program complete, Copperstone Resources (VSE) is testing the continuity of thickly mineralized beds on the Nuevo Lucifer concession at its Boleo copper-cobalt project in Mexico.

The junior is earning an 80% interest in the project, situated in Baja California Sur, from Island-Arc Resources (VSE) and has drilled 10 holes at 250-metre stepouts to the north and northwest of holes 95-13 and 95-14. Returns here include 8.72 metres of 1.37% copper plus 0.052% cobalt, and 30.74 metres of 1.01% copper plus 0.039% cobalt, respectively.

Other results include 14.19 metres grading 0.86% copper and 0.019% cobalt plus 4.5 metres of footwall grading 0.34% copper and 0.026% cobalt over a depth of 100.71 to 119.4 metres for hole 96-21.

Hole 96-31 returned 10.28 metres grading 2.44% copper and 0.044% cobalt plus 14.66 metres of footwall grading 0.23% copper and 0.018% cobalt over a depth of 211.35 to 236.29 metres.

Hole 96-31 was lost in mineralization at a depth of 237.43 metres and returned 0.83% copper and 0.026% cobalt over the remaining 1.14 metres.

Hole 96-34, a stepout hole east of hole 96-31, was lost in mineralization at 195.07 metres. It returned 0.52% copper and 0.015% cobalt over 7.77 metres of hangingwall plus 2.91% copper and 0.018% cobalt for the last 3.17 metres.

While both holes will be re-drilled, Copperstone intends to drill between them in the interim.

Early drilling on the Lucifer concession indicates that the mineralized beds lie on an irregular, erosional surface near the underlying Comondu volcanic basement rocks. Holes 96-22, 23 and 29 returned lower-grade intersections of conglomerates intermixed with mineralized clay fragments. The holes give evidence of undersea slumping and channel erosion during or after deposition.

In other areas, the sandy, mineralized horizons are intact and, with the exception of holes 96-25 and 28, thick. Hole 96-25 intersected 5.04 metres grading 0.81% copper and 0.057% cobalt, whereas 96-28 yielded 1.74 metres grading 1.01% copper and 0.032% cobalt.

Of the two holes that tested the Nuevo Purgatorio concession, one failed to reach its intended target, while the other intersected several cobalt intervals grading 0.11% over 2.12 metres and 0.11% over 1.45 metres.

The only hole planned for the Nuevo San Luciano concession was abandoned, as a result of drilling problems.

Elsewhere, Copperstone tested the San Carlos Basin, 40 km north of Santa Rosalia, with

an additional three holes. These returned anomalous values of copper, cobalt, manganese and zinc.