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Hardshell Mine | |
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Hardshell Skarn, Arizona Zn-Pb-Ag skarn project
The Hardshell Skarn Project is located approximately 75 kilometers southeast of Tucson, Arizona within the Patagonia Mountains and adjacent to South32s(formerly AZ Minerals) advancing Hermosa project. EMX has entered into an Exploration and Option Agreement through its wholly owned subsidiary Bronco Creek Exploration, Inc. for the Hardshell Skarn project with Arizona Minerals Inc., a subsidiary of Arizona Mining Inc. (TSX: AZ). The Project is comprised of 16 unpatented federal lode mining claims totaling approximately 279 acres and lies between the Sunnyside porphyry copper system (Regal Resources Inc.) to the west, the Hermosa project (AZ Minerals) to the east, and the historic Trench mine to the north. On August 11, 2018 South32 acquired the parent company Arizona Mining(Arizona Minerals) which includes the Hermosa and Hardshell Projects. EMX is targeting base and precious metals mineralization hosted in skarn and replacement bodies within a series of Paleozoic limestones. These carbonate rocks, as well as skarn mineralization, were intersected by Asarco in deep historic drilling (depths from 1,256-1,491m) adjacent to the Sunnyside porphyry center and to the northwest of the Project boundary. From west to east, the target rocks step to shallower levels across the EMX land position by a series of north trending faults and are less than 100 meters below the surface immediately east of the Project. It is anticipated that South32 will incorporate the Hardshell Skarn property into their ongoing Hermosa project exploration programs. The adjacent properties provide context for the Hardshell Skarn project, which occurs in a similar geologic setting. However, this is not necessarily indicative that the Project hosts similar mineralization.10 Mining District and MinesTyndall District - aka Sheehy - O'Donnell, O. K. Rover.1 Owners and Operators included Santa Cruz Silver - Lead Co., Sunrise Mg. Co., Arivaca Mg. Corp. Colorado Fuel & Iron Steel Corp.1 Location
20S 14E Cen. & SE¼ 301 Mineral ProductsPb, Ag, Mn, Cu-, Zn-, Au-1 GeologyIrregular, lensing orebodies and ore shoots of ferruginous and manganiferous, argentiferous cerussite, complex lead and zinc oxidation products, cerargyrite and other silver halides, and spotty copper and gold as replacements of fault gouge and silicified fault breccia in a strong fault zone. Wall rocks are Jurassic - Triassic volcanics and Cretaceous andesite with thin interbedded limestone, shale, and conglomerate. Some spotty high grade manganese oxide areas. Cretaceous dioritic and andesitic dikes present. Generally weak, base metal sulphides found in depth. 1
Type of Operation and Production
Extensive shaft and tunnel operations. Worked from 1896 through 1964, producing some 35,000 tons of ore averaging about 6% Pb, 8 oz. Ag/T, 0.5% Cu and minor Zn and Au, and about 1,000 tons of Mn ore and concentrate averaging about 40% Mn1. References
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