Overview
| Stage | Permitting |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Mine Life | 8.8 years (as of Jan 1, 2016) |
The Hasbrouck Gold Project consists of two all-oxide gold-silver deposits eight km apart, near the Town of Tonopah in southern Nevada.
The Project's first pit, Three Hills Mine, is fully permitted and is now at 100% construction readiness, with a fully developed construction plan, a level-3 construction schedule, and issued-for-construction drawings, and waiting for a much more favorable pricing environment prior to making a construction decision.
The Project's second pit, Hasbrouck Mine, is scheduled to start producing two years after the start of the first pit, and has a federal permit and is close to being at 100% construction readiness. |
Source:
| Company | Interest | Ownership |
|
West Vault Mining Inc.
|
100 %
|
Indirect
|
|
Hasbrouck and Three Hills LLC
(operator)
|
100 %
|
Direct
|
On January 24, 2014, West Kirkland Mining (now West Vault Mining) signed a purchase agreement with Allied Nevada Gold Corp. (“ANV”) to acquire ANV’s Hasbrouck Project. On April 23, 2014 West Kirkland Mining purchased a 75% interest in the Hasbrouck Project.
As outlined in the purchase agreement, 100% title to the mineral rights underlying the Hasbrouck Project has been transferred into a Limited Liability Corporation (the “LLC”) for ownership and operating purposes.
Effective September 1, 2016, West Kirkland Mining transferred a 25% interest in the LLC to Waterton Precious Metals Fund (“Waterton”) and retained the remaining 75% interest after a formal operating agreement was executed during the year. [Q32018, MDA, p. 11]
On August 14, 2020 - West Vault Mining Inc. completed the purchase of a 25% interest in the Hasbrouck gold project. West Vault has now consolidated 100% ownership of the Hasbrouck Gold Project.
Contractors
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Deposit Type
- Epithermal
- Breccia pipe / Stockwork
Summary:
The Hasbrouck deposit is a low-sulfidation, epithermal gold–silver deposit located in the western portion of the Divide Mining District. Host rocks are primarily tuffs and sediments of the Siebert Formation with limited mineralization within the underlying Fraction Tuff. Gold and silver mineralization consists principally of 0.1in to 1.0in wide, discontinuous silica-pyrite veinlets, sheeted veinlets and stockworks, all closely associated with larger, but erratic bodies of hydrothermal breccia. Sulfide minerals have been largely oxidized. Mineralization is accompanied by strong pervasive silicification, with associated adularia and pyrite, and has a known extent of 2,800ft east–west by 2,400ft north–south, with a maximum depth of 900ft. Mineralization is open at depth and to a limited extent to the northwest and east.
Gold occurs as electrum, as inclusions in pyrite and in goethite derived from the partial to complete oxidation of pyrite, and within siliceous gangue minerals (Graney, 1985; Hazen, 1989). Silver occurs in the native state and in argentite (Wittkopp, 1982). Silver is also intimately associated with iron oxides derived from the oxidation of silver-rich sulfide minerals that occurred as inclusions in pyrite (Wittkopp, 1982).
Hasbrouck mineralization is primarily characterized as structurally-controlled, with secondary lithologic control. West-northwest and northeast fault orientations localize higher-grade mineralization (+0.05 oz Au/ton) wit ........
Summary:
The Hasbrouck project PFS includes mining at both the Three Hills Mine and the Hasbrouck Mine. These are planned as open-pit, truck and loader operations. Access roads were included in the pit and waste rock storage area designs, which were considered suitable for the type of equipment used. Waste rock storage areas were designed to contain the rock waste associated with the reserves. One main waste rock storage areas was identified for Three Hills and 2 additional waste rock storage areas were designed for Hasbrouck. Safety berms were designed between the designed pits and dumps and US Highway 50 to contain any material that may try and roll off of the mining site.
Three Hills production schedules have been completed based on a 15,000tpd production requirement for the ROM heap-leach pad. In total, 504,000 cubic yards (702,000 tons) of waste rock is scheduled for construction purposes.
Hasbrouck Mine production schedules were completed based on a 17,500tpd production requirement. Mining at Hasbrouck was assumed to start during the second year of production for the project. Little pre-stripping is required as ore is located near the surface, though waste rock is mined early to provide construction fill material.
It is anticipated that the contractor will have between 60 and 80 operators and staff involved with the operation. It has been assumed that the contractor will work 12 hour shifts, 2 shifts per day, 7 days per week. Other mine ........
Source:
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Source:
Summary:
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Projected Production:
| Commodity | Units | Avg. Annual | LOM |
|
Gold
|
koz
| 71 | 577 |
|
Silver
|
koz
| ...... | ...... |
|
Gold Equivalent
|
koz
| ...... | ...... |
All production numbers are expressed as metal in doré.
Operational Metrics:
| Metrics | |
|
Daily processing rate
| 15,986 tons * |
|
Annual ore mining rate
| 6 M tons * |
|
Stripping / waste ratio
| 1.06 * |
|
Waste tonnes, LOM
| 47,933 k tons * |
|
Ore tonnes mined, LOM
| 45,270 k tons * |
|
Total tonnes mined, LOM
| 93,203 k tons * |
* According to 2016 study.
Reserves at September 14, 2016:
Cut-off grade for Hasbrouck reserves: upper Siebert 0.008 oz Au/ton, and Hasbrouck lower Siebert 0.007 oz Au/ton.
Cut-off grade for Three Hills reserves: 0.005 oz Au/ton.
The Hasbrouck deposit gold and silver resources: 0.006oz AuEq/ton cutoff grade.
The Three Hills deposit gold resources: 0.005oz Au/ton cut-off grade.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
6,242 k tons
|
Gold
|
0.02 oz/ton
|
127 koz
|
|
Proven
|
6,242 k tons
|
Silver
|
0.41 oz/ton
|
2,562 koz
|
|
Probable
|
39,028 k tons
|
Gold
|
0.016 oz/ton
|
461 koz
|
|
Probable
|
39,028 k tons
|
Silver
|
0.273 oz/ton
|
8,007 koz
|
|
Proven & Probable
|
45,270 k tons
|
Gold
|
0.017 oz/ton
|
762 koz
|
|
Proven & Probable
|
45,270 k tons
|
Silver
|
0.233 oz/ton
|
10,569 koz
|
|
Measured
|
8,261 k tons
|
Gold
|
0.017 oz/ton
|
143 koz
|
|
Measured
|
8,261 k tons
|
Silver
|
0.357 oz/ton
|
2,949 koz
|
|
Indicated
|
56,821 k tons
|
Gold
|
0.014 oz/ton
|
784 koz
|
|
Indicated
|
45,924 k tons
|
Silver
|
0.243 oz/ton
|
11,147 koz
|
|
Measured & Indicated
|
65,082 k tons
|
Gold
|
0.014 oz/ton
|
927 koz
|
|
Measured & Indicated
|
54,185 k tons
|
Silver
|
0.26 oz/ton
|
14,096 koz
|
|
Inferred
|
14,340 k tons
|
Gold
|
0.009 oz/ton
|
136 koz
|
|
Inferred
|
11,772 k tons
|
Silver
|
0.191 oz/ton
|
2,249 koz
|
Source:
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