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United States
Bruner Project

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 Location:
172 km E from Carson City, Nevada, United States

  Project Contacts:
804 - 750 West Pender Street
Vancouver
British Columbia, Canada
V6C 3T7
Phone  ...  Subscription required
Fax604-685-6905
EmailEmail
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  • Overview
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  • Geology
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life8 years (as of Jan 1, 2018)
On August 31, 2021, the Company acquired the Bruner Property, located in Nye County, Nevada, from Canamex Gold Corp. (“Canamex”).

A historic resource estimate of 342,000 oz of gold contained in 17.5 million tonnes grading 0.61 gpt Au, was prepared for Canamex in a technical report dated January 22, 2018 titled “NI 43-101 Technical Report on the Bruner Gold Project, Updated Preliminary Economic Assessment, Nye County, Nevada, USA” by Welsh Hagen Associates. A “qualified person” (as defined in NI 43-101) has not done sufficient work for the Company to classify the historical estimate as a current mineral resource or mineral reserve. The Company is not treating the historical estimate as a current mineral resource or mineral reserve, has not verified the historical resource estimate and is not relying on it.


Owners

Source: p. 1
CompanyInterestOwnership
Endeavour Silver Corp. 100 % Direct
Vancouver, Canada – September 1, 2021 – Endeavour Silver Corp. (TSX: EDR, NYSE: EXK) (“Endeavour”) is pleased to announce that it has completed the acquisition of the Bruner Property, located in Nye County, Nevada, from Canamex Gold Corp. (“Canamex”). Endeavour paid US$10 million in cash for 100% of the Bruner Gold Project which includes mineral claims, mining rights, property assets, water rights, and government authorizations and permits.

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

Gold and silver at the Bruner property occur within narrow quartz + adularia +/- pyrite veins and veinlets, along fractures, and in disseminations that are manifested as sheeted/stockwork zones, vein swarms, and rare 0.3-2 meter wide veins, hosted by high-silica rhyolite flow domes and encasing and surrounding volcaniclastic units that overlie a mostly unaltered andesite base. The mineralization style is classified as low-sulfidation epithermal (LSE) with occasionally highgrade gold+quartz+adularia veins occurring within broad zones of hydrothermal alteration containing low-grade gold and silver.

Three zones of gold-silver mineralization have been outlined by drilling: the Historic Resource Area, and the Paymaster zone, which are located on patented mining claims, and the Penelas Zone, including both the historic Penelas Mine and the relatively newly discovered Penelas East area, which is located entirely on unpatented mining claims. All three areas have seen limited mining activity and production in the past, largely by selective underground methods.

Outcrop in the Historic Resource Area is dominated by moderately (30-55°) north-dipping biotite-rich Tbl rocks with intruding rhyolite dikes (Tr1) and rare occurrences of rhyolite tuffisite dikes (Ttd) and mafic intrusive rocks (Tba).

Structural measurements from the Historic Resource Area show that veins, faults, and joints are consistently north-trending and steeply-dipping and display normal ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining operation is assumed to be a conventional open pit mine, with drill and blast rock breakage and truck and loader materials handling.

The mine production schedule was based on an average of 7,500 tonnes/day delivered to the crusher and lower grade ores being placed directly on the heap leach pad as run of mine (ROM) ore. WHA opted to take the mineralized material between 0.117 and 0.192 gold equivalent and treat it as run of mine material, that is, not crush it prior to stacking on the pads. The pits will be mined sequentially beginning at the Paymaster pit and progressing southeasterly to the HRA and Penelas pits. The production schedule was constrained to produce a constant feed of mineralized material to the crusher and conveyor loading onto the heap leach pad. ROM ores will be stacked on the heap leach pad without crushing. The ratio of ROM ore to crushed ore may vary due to gold price, ore grade, crushing costs, and recovery projections. Based on the high leachability of the mineral deposits, it is probable that a high percentage of the ore will be placed as ROM ore. Some stockpiling of higher grade material may be required to balance the crusher feed rate.

No site specific geotechnical studies have been undertaken to date, other than the kinematic structural analysis completed by Dering (2014), and therefore pit slopes were based on reasonable assumptions and observation of nearby operating surface mines. An overall pit slope of 55° was ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityUnitsLOM
Gold oz 349,300
Silver oz  ......  Subscription required
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Daily mining rate 37,500 t *
Daily ore mining rate 7,500 t *
Waste tonnes, LOM 65,200 kt *
Ore tonnes mined, LOM 21,800 kt *
Total tonnes mined, LOM 87,000 kt *
* According to 2018 study.

Reserves at December 26, 2017:
Resources are reported using a 0.006 oz/t (0.192 gpt Au equiv.) gold cut-off grade for crush material, and a 0.004 oz/t (0.117 gpt Au equiv.) gold cut-off grade for crush material above internal breakeven but below external breakeven cutoff.

CategoryTonnage CommodityGradeContained Metal
Indicated 19,550 kt Gold 0.56 g/t 353 koz
Indicated 19,550 kt Silver 5.32 g/t 3,342 koz
Inferred 2,250 kt Gold 0.53 g/t 38 koz
Inferred 2,250 kt Silver 4.14 g/t 299 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold USD 796 / oz *  
Assumed price Silver USD 17 / oz *  
Assumed price Gold USD 1,280 / oz *  
* According to 2018 study / presentation.

Operating Costs:

Units2018
OP mining costs ($/t milled) USD 2.33 *
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2018 study.
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2018 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 57.1
G&A costs $M USD 21.3
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 0% $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 0% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Jan 22, 2018
....................... Subscription required ....................... Subscription required ....................... Subscription required Jan 22, 2018
....................... Subscription required ....................... Subscription required ....................... Subscription required Jan 22, 2018
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
Preliminary Economic Assessment 2018
Quarterly Report 2017
Preliminary Economic Assessment 2016
Management Discussion & Analysis 2015
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