• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
United States
Mother Lode Project

This page is not tailored to
devices with screen width under 750 px.
 Location:
10 km E from Beatty, Nevada, United States

  Project Contacts:
Suite 1750-700 West Pender Street
Vancouver
British Columbia, Canada
V6C 1G8
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in United States
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life8 years (as of Jan 1, 2020)


Owners

Source:
CompanyInterestOwnership
AngloGold Ashanti Ltd. 100 % Indirect
The Mother Lode Project is 100% controlled by Corvus Gold Nevada Inc. (“CGNI”), a wholly owned subsidiary of Corvus Gold Inc.

Jan. 18, 2022 (GLOBE NEWSWIRE) -- AngloGold Ashanti Limited (“AngloGold Ashanti”) (JSE: ANG, NYSE: AU) and Corvus Gold Inc. (“Corvus” or the “Company”) (TSX: KOR, NASDAQ: KOR) are pleased to announce the successful completion of the previously announced plan of arrangement under the Business Corporations Act (British Columbia) (the “Arrangement”) between Corvus, 1323606 B.C. Unlimited Liability Company (the “Purchaser”) and AngloGold Ashanti Holdings plc (the “Guarantor”). The Purchaser is an indirect wholly owned subsidiary of AngloGold Ashanti and the Guarantor is a direct wholly owned subsidiary of AngloGold Ashanti.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Carlin-type
  • Sediment-hosted
  • Volcanic hosted


Summary:

Deposit Type
Mineralization at MLP most closely resembles Carlin-type sediment-hosted gold systems of northern Nevada. The Mother Lode deposit model includes structurally and stratigraphically-controlled disseminated sulphide and oxide mineralization hosted in primarily in Tertiary sedimentary rocks and rhyolite porphyry dikes. Paleozoic sedimentary rocks comprise a smaller volume host in proximity to dikes and the basal Tertiary unconformity. Tertiary volcanic rocks and debris flow breccias are also mineralized at Mother Lode. Alteration types associated with gold mineralization include passive decalcification and illite-pyrite alteration. Unique features of Mother Lode-style mineralization compared to typical Carlin-type deposits include: the association with fluorine, the significant volume of mineralization that is rhyolite porphyry dike-hosted, elevated tellurium and bismuth, and the generally passive, innocuous, very low-silica nature of the mineralization. Carlin-type gold deposits are generally known to form at depths of >2 kilometers, at temperatures between 180-240oC. Mineralization at Mother lode may have formed at depths of 500-1000 meters or less, and at temperatures <240oC (Weiss, 1996).

Mineralization
Mother Lode is characterized as a sediment, intrusive, and locally volcanic-hosted disseminated gold deposit. Mineralization most closely resembles Carlin-type sediment-hosted gold deposits of north-central Nevada. The Mother Lode deposit f ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The proposed mining method is conventional open pit mining. Mineralized material and waste would be drilled and blasted, then loaded into 227-t payload haul trucks with 34 m3 bucket capacity shovels. The loading and haulage fleet would be supported by track dozers, motor graders, and water trucks. Waste would be hauled to the Waste Rock Management Facility (WRMF) located on Corvus controlled lands. Mill sulphide resources would be hauled to the mill stockpile while run-of-mine oxide (ROM) resources would be hauled and placed directly on the heap leach pad.

The proposed mining operation is owner operated equipment.

Overall pit slope angles of 55° were used in the LG runs. Dilution was not accounted for in the optimization for this preliminary design exercise.

The mine production schedule focused on providing the 8,200 tpd of sulphide mill feed. Adjustments to the grade streaming schedule waste forecast were made to smooth the overall mine equipment demand. Approximately 5.1 M tonnes of sulphide material mined and stockpiled at Corvus’s North Bullfrog Project (NBP) were included in the mill feed schedule to balance the mill throughput. Costs for shipping this material from the NBP to the MLP were included in the financial evaluation.

The mining schedule begins in period -1 and continues through period 7. Mill mineralized material would be stockpiled based in the mining periods where the mine output is greater than the 8,200 tpd mill ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 1711,377
Silver koz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as payable metal.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Daily mining rate  ......  Subscription required
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Daily processing rate  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual mining rate  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

Reserves at October 7, 2020:
Cut-off grades for mill processing were 0.06 g/t for oxide gold mineralization and 0.40 g/t for sulphide gold mineralization.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured Heap leach 17,018 kt Gold 0.39 g/t 211 koz
Measured Sulphide 7,311 kt Gold 1.19 g/t 280 koz
Measured Total 24,329 kt Gold 0.63 g/t 491 koz
Measured Heap leach 17,018 kt Silver 0.98 g/t 534 koz
Measured Sulphide 7,311 kt Silver 0.76 g/t 179 koz
Measured Total 24,329 kt Silver 0.91 g/t 713 koz
Indicated Heap leach 22,242 kt Gold 0.47 g/t 339 koz
Indicated Sulphide 13,668 kt Gold 1.64 g/t 722 koz
Indicated Total 35,910 kt Gold 0.92 g/t 1,061 koz
Indicated Heap leach 22,242 kt Silver 0.8 g/t 573 koz
Indicated Sulphide 13,668 kt Silver 0.51 g/t 223 koz
Indicated Total 35,910 kt Silver 0.69 g/t 796 koz
Measured & Indicated Heap leach 39,260 kt Gold 0.44 g/t 550 koz
Measured & Indicated Sulphide 20,980 kt Gold 1.49 g/t 1,002 koz
Measured & Indicated Total 60,240 kt Gold 0.8 g/t 1,552 koz
Measured & Indicated Heap leach 39,260 kt Silver 0.88 g/t 1,107 koz
Measured & Indicated Sulphide 20,980 kt Silver 0.6 g/t 402 koz
Measured & Indicated Total 60,240 kt Silver 0.78 g/t 1,509 koz
Inferred Heap leach 6,978 kt Gold 0.4 g/t 90 koz
Inferred Sulphide 2,883 kt Gold 0.9 g/t 83 koz
Inferred Total 9,862 kt Gold 0.55 g/t 173 koz
Inferred Heap leach 6,978 kt Silver 1.05 g/t 235 koz
Inferred Sulphide 2,883 kt Silver 1.77 g/t 164 koz
Inferred Total 9,862 kt Silver 1.26 g/t 399 koz

Commodity Production Costs:

CommodityUnitsAverage
Total cash costs Gold USD  ......  Subscription required *†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required *†
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2020 study / presentation.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2020
OP mining costs ($/t milled) USD 7.45 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

2020 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 502
G&A costs $M USD 56.5
Total OpEx $M USD  ......  Subscription required
Mining Taxes $M USD  ......  Subscription required
Income 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 @ 5% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 7.5% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of October 7, 2020:
HME TypeSizeQuantityLeased or
Contractor
ANFO Loader ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 7, 2020
....................... Subscription required ....................... Subscription required Subscription required Oct 7, 2020
....................... Subscription required ....................... Subscription required Subscription required Jul 31, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
Subscription required - Subscription is required.

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2023 MDO Data Online Inc.