Maestro Ventures Ltd. - Green Springs

Green Springs - Target Mineralization

The mineralization style at Green Springs is a typical Carlin-type gold system. It displays all the hallmarks of Carlin-style deposits including being hosted by Paleozoic calcareous/clastic sedimentary rocks, ore zones with diffuse boundaries and extremely fine-grained gold, alteration dominated by silicification (jasperoid) and decalcification, and associated anomalous pathfinder geochemistry of arsenic, antimony, thallium, mercury, and barium. Even the high silver values in the basal Pilot Shale, while uncommon, are also seen in basal silicified rocks in some other Carlin-type systems including the north end of the Carlin Trend and at the Mercur mine in Utah (Jory, 2002; Wilson and Parry, 1990).

Excellent potential exists for the delineation of more economically viable gold deposits at Green Springs. The exploration target at Green Springs is Carlin-style precious metal style hosted by middle Paleozoic sedimentary rocks. The primary target unit on the project will be the Pilot Shale, a regionally important host rock unit. The Pilot Shale underlies the entire property at generally shallow depths of less than 500 feet (150 meters). This target has been relatively untested and Genesis Gold has begun to identify within this unit, including untested outcrops carrying ore-grade gold values (up to 2.5 grams/ton or 0.0804 oz/ton gold). In addition, the Pilot Shale hosts the A zone mineralization which includes drill intercepts of 160 feet (49 meters) of 0.90 grams/ton gold and 95 feet (29 meters) of 1.35 grams/ton gold.

Historic mined gold mineralization was restricted to the silty limestones and jasperoids of the lower Chainman Formation, where it is controlled by structurally generated permeability. Gold occurred in irregular to elliptical, near-vertical shoots which transect, and were independent of alteration facies. The shoots usually extended from the middle of jasperoid in the lower Chainman lower jasperoid into the middle of the lower Chainman limestone. The South C shoot continued into jasperoid in the upper Chainman, where its exposure was the discovery outcrop. The highest gold values often coincided with the decalcified facies between the lower jasperoid and the over-lying limestone. Weak bedding control was illustrated by up-dip ore extensions, particularly within the lower jasperoid. Gold values generally tapered smoothly away, both horizontally and vertically, from high-grade cores, which assay as much as 15 grams per ton (0.48 oz/ton), into waste rock.

Geochemistry at Green Springs is typical of that in Carlin-style systems, with gold associated with anomalous arsenic, antimony, silver, barium, mercury, and thallium. This has been documented in soils and drilling by USMX geologists and in rock samples by Genesis Gold geologists.

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