Frontera finds more copper at Piedras Verdes

Frontera Copper (FCC-T) has hit significant copper while channel sampling in a new area at its Piedras Verdes project, 21 km northwest of Alamos in Sonora State, Mexico.

Six trenches were sampled highlighted by trench 4 which graded 1.87% copper over 18 metres.

Trench 3 cut 93 metres grading 0.38% copper and trench 1: 36 metres grading 0.34% copper.

Trench 2 cut two intervals six-metres in length; one graded 0.37% copper while the other graded 0.28% copper.

Trench 5 cut as high as 1.55% copper over 15 metres.

The sixth trench cut 18 metres grading 0.25% copper.

All samples were taken in the Cerro Chato area, 1.5 km west of the proposed Piedras Verdes open pit.

Chip samples 7-10 cm wide were taken along three-metre intervals in bulldozer-dug trenches. In total 109 samples were taken within zones which displayed copper-oxide mineralization in a 500-metre by 500-metre area.

Follow up drilling is planned.

Last year mineable reserves at Piedras Verdes stood at 191 million tonnes grading 0.36% copper.

In addition a feasibility study proposed annual copper production of 70 million lbs. over an 18-year mine-life with a cash cost of US52 per lb. copper cathode produced.

Ore processing is to include heap leaching and solvent extraction-electrowinning.

The company has begun construction of a new townsite, named Nuevo Piedras Verdes; once complete 49 households will relocate there.

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