Location: RENO, NEVADA
Topic: GSN Membership Meeting – Bill Howald, Black Rock Silver Corp.
Title: “Awakening the Silver Queen” (see abstract below)
Time: Apr 16, 2021 06:00 PM Pacific Time (US and Canada)
Meeting ID: 854 0125 6144
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Meeting ID: 854 0125 6144
AWAKENING THE SILVER QUEEN
William C. Howald, Executive Chairman
Blackrock Silver Corporation
Vancouver, British Columbia, Canada
It’s often stated that the Comstock put Nevada on the map, and Tonopah kept it there. The Tonopah district is located at the south end of the San Antonio Mountains in west central Nevada within the Walker Lake trend. Known as the Queen of the Silver Camps, Tonopah produced over 174 million ounces of silver and 1.8 million ounces of gold from approximately 7.5-million tonnes of high-grade silver-gold epithermal quartz veins and is the second largest silver district in Nevada.
The history of Tonopah is famed and fabled in the characters that descended on the mining camp. Tonopah enthralled Jim Butler, Tasker Oddie, Wyatt Erp, George Wingfield, Charles Schwab, and Howard Hughes an many others over its 120-year history.
Discovered by Jim Butler’s lost mule in May 1900, the find kicked off four recognized mining periods. From 1900 to 1902, mining was almost exclusively carried out by individual leasers. From about 1903 to 1910, the district attracted large publicly traded mining companies that purchased existing claims and built infrastructure. By 1910, the mining groups began a phase of merger and expanded production. The Tonopah Extension Mining Company (TEMC) amalgamated more than five mining entities on the west side of the district to become the third largest producer. The period of increased production was followed by an era (1930 to 1950) of decline caused by water in the mines, low silver prices and the Great Depression.
The district is host to a classic bonanza-grade low- to intermediate-sulfidation epithermal silver and gold system. Wall-rock alteration in the epithermal system grades from fresh rock to propylitic alteration to intermediate argillic alteration to potassic alteration (adularia) at vein margins to quartz veins with sulfides. Farley recognized three stages of vein filling with an early and late barren stage. The ore stage formation temperatures range from 220 degrees Celsius to 280 degrees Celsius. The principal silver-bearing minerals are argentite (acanthite), polybasite, and pyrargyrite. Gold occurs predominately as electrum. Silver haloids were important ore minerals in the shallow oxide zone. The age of the bonanza-grade mineralization is estimated to be between 17 m.y. and 20.5 m.y. based on stratigraphic limits. A younger gold system is also present.
In the Western half, the ore hosts are the Tonopah Formation, Mizpah Andesite, Extension Breccia, and the West End Rhyolite. Exposures of the Tonopah Formation and Mizpah Andesite outcrop. The West End Rhyolite and Extension Breccia are exposed only in underground workings on the west side of the district.
The veins are east-west oriented and dips range between 15 to 90 degrees. In the western portion, the veins occur at contacts with the West End Rhyolite and the Tonopah Formation, Extension Breccia and the Mizpah Andesite. Occasionally veins are found internal to these lithologies. The Tonopah Formation is domed along an east-west axis. Along the dome, veins roll over from north dipping to flat to shallow south dips. Several lawsuits were fought over Apex Rights.
Modern exploration efforts commenced in 1979. Between 1979 and 2019, several exploration companies conducted drilling in the western half of the district including Houston Oil and Minerals, Eastfield Resources Ltd. and West Kirkland worked in the district.
In February 2020, Blackrock Silver Corporation completed a transaction with Ely Gold Royalties to acquire 100% of the Western half of the Tonopah district for US$3 million dollars over four years. Ely Gold retains a 3% NSR royalty. Blackrock acquired the lands of the former TEMC and a major portion of the West End Consolidated Mining Company. The lands acquired consists of 97 patented lode mining claims and 19 unpatented lode mining claims straddling the Esmeralda and Nye County boundary.
Blackrock initially outlined a 7,000-meter drilling program in four target areas. In July, Blackrock announced the results of its first drillhole in the Victor area which returned three meters grading 2,198 g/t silver equivalent (silver:gold ratio 100:1) using a 300 g/t AgEq cut-off grade, and 965 g/t AgEq over 29 meters. Drilling in two other targets returned exciting results including 1,577 g/t AgEq over 4.6 meters including 3.0 meters grading 2,215 g/t AgEq. The drillhole also intersected a new vein yielding 1.5 meters of 1,670 g/t AgEq.
Because of the encouraging results on Blackrock’s maiden drill campaign, the drill program was expanded to 20,000 meters. Drilling is focused on expanding and delineating the historic and new underground targets from the surface. Currently the project is advancing with 3 core drills and one RC rig. An initial resource estimate planned for late 2021.
For more information visit our website at www.blackrocksilver.com
Details04/16/2021 18:15:0004/16/2021 20:30:00America/Los_AngelesGSN Monthly Membership Meeting – Friday, April 16th @ 6:30 p.m.Reno, NV
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