Maestro Ventures Ltd. - Green Springs

Green Springs - Exploration History

Modern exploration at the Green Springs property was initiated by USMX in the late 1970's as part of regional jasperoid exploration program, and continued with various joint venture partners until 1986. The exploration model used at that time focused on the "Pilot Shale/Alligator Ridge model", and while targets were identified and drilled, none proved large enough to warrant continuing in the partnership. At that time, USMX began its own exploration program, focused on finding and developing resources in the near-surface Chainman Formation units. As a result, lode claims overlying the Green Springs deposits were initially staked in 1979 along a 2.5-mile long (4-kilometer) north-trending band of jasperoids that crop out prominently along the western front of the White Pine Range.

Exploration drilling by USMX commenced in June 1986 The fourth drill hole in the program intersected 69 feet (21 meters) of 1.9 grams per ton gold (0.061 oz/ton), starting at a depth of 10 feet (3 meters) below the surface. Over the next 12 months, approximately 350 holes were drilled on a 50 by 100-foot (15 by 30-meter) grid, which delineated the deposits.

At the same time the drilling program began, a detailed soil sampling program was conducted over the 1.5 mile (2.4 kilometer) band of jasperoids that were subsequently found to constitute the main gold trend. Gold values as high as 3.4 grams per ton (0.109 oz/ton) were obtained from soil samples over argillized limestone next to relatively barren jasperoid outcrops over portions of what subsequently was found to be the main gold deposit. The results of the soil program, coupled with detailed mapping, were instrumental in guiding USMX's successful drilling program in the Greens Springs area. Stream sediment samples also identified the main ore body.

The drill campaign of 350 shallow drill holes defined the C, C North, and D gold deposits which reportedly contained 1.1 million metric tons of ore at a grade of 2.1 grams per ton (0.0675 oz/ton Au). The deposits were mined from 1988 to 1990 and processed with heap leach technology. In addition to these gold deposits two more gold deposits, the "B"and "E", which have not been mined (Wilson, Cox and Lance, 1991). Cox (personal communication, 2004) says that the B and E "deposits" may contain a combined 10,000 to 20,000 ounces of gold resource. The Cox claims, controlled by Maestro, cover the B and E deposits.

The C, C North and D gold deposits were mined between May, 1988 and early 1990. The deposits produced 1.1 million metric tons of mineralized rock that averaged 2.1 grams per ton (0.0675 oz/ton) gold at a cutoff of 0.7 grams per ton (0.0225 oz/ton), with a strip ratio of 2.7 to 1. The largest pit, the C pit, covered three closely spaced gold deposits and contained one million tons that averaged 1.9 grams per ton gold (0.0611 oz/ton). The highest grade gold previously mined on the Green Springs property was from the D pit, which yielded 140,000 metric tons that averaged 2.4 grams per ton (0.0772 oz/ton) from a single 395-foot by 100-foot by 100-foot shoot (120-meter by 30-meter by 30-meter).

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