• 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
Pebble Project

This page is not tailored to
devices with screen width under 750 px.
 Location:
330 km SW from Anchorage, Alaska, United States

  Project Contacts:
2525 Gambell Street, Suite 405
Anchorage
Alaska, United States
99503
Phone  ...  Subscription required
Fax(907)-339-2601
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

StagePermitting
Mine TypeOpen Pit
Commodities
  • Copper
  • Molybdenum
  • Gold
  • Silver
  • Rhenium
Mining Method
  • Truck & Shovel / Loader
Mine Life20 years (as of Jan 1, 2022)
Pebble currently is both the largest known undeveloped copper resource and the largest known undeveloped gold resource in the world.
Latest NewsNorthern Dynasty Minerals Ltd.: Final Determination for Pebble Deposit Area     January 30, 2023


Owners

Source: p. 1
CompanyInterestOwnership
Northern Dynasty Minerals Ltd. 100 % Indirect
Northern Dynasty's principal asset, owned through its wholly owned Alaska-based U.S. subsidiary, Pebble Limited Partnership, is a 100% interest in a contiguous block of 1,840 mineral claims in Southwest Alaska, including the Pebble deposit, located 200 miles from Anchorage and 125 miles from Bristol Bay.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Porphyry


Summary:

Pebble is a porphyry-style copper-gold-molybdenum-silver-rhenium deposit that comprises the Pebble East and Pebble West zones of approximately equal size, with slightly lower-grade mineralization in the center of the deposit where the two zones merge. The Pebble deposit is located at the intersection of crustal-scale structures that are oriented both parallel and obliquely to a magmatic arc which was active in the mid-Cretaceous and which developed in response to the northward subduction of the Pacific Plate beneath the Wrangellia Superterrane.

The oldest rock within the Pebble district is the Jurassic-Cretaceous age Kahiltna flysch, composed of turbiditic clastic sedimentary rocks, interbedded basalt flows and associated gabbro intrusions.

The Pebble East and Pebble West zones are coeval hydrothermal centers within a single magmatic-hydrothermal system. The movement of mineralizing fluids was constrained by a broadly vertical fracture system acting in conjunction with a hornfels aquitard that induced extensive lateral fluid migration.

Mineralization in the Pebble West zone extends from surface to approximately 3,000 ft deep and is centered on four small granodiorite plutons. Mineralization is hosted by flysch, diorite and granodiorite sills, and alkalic intrusions and breccias. The Pebble East zone is of higher grade and extends to a depth of at least 5,810 ft; mineralization on the eastern side of the zone was later dropped 1,970 to 2,950 ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining operations are planned to use conventional open pit mining methods and equipment. The proposed Pebble mine would be a conventional drill, blast, truck, and shovel operation with an average mining rate of approximately 70 million tons per year and an overall strip ratio of 0.12 ton of waste per ton of mineralized material.

The open pit would be developed in stages, with each stage expanding the area and deepening the previous stage. The final dimensions of the open pit would be approximately 6,800 ft long and 5,600 ft wide, with depths to 1,950 ft.

The projected mining schedule was generated using five pushbacks and was based on a maximum processing capacity of 180,000 ton/d. Based on the selected ultimate pit, final pit design and the generated production schedule, the Project’s total LOM is 21 years, including 1 year of pre-stripping followed by 20 years of production. Over the 21-year LOM, the pit would produce 1,291 million tons of mineralized material and 153 million tons of overburden and waste rock. The LOM stripping ratio (defined as waste material mined, in tons, divided by mineralized material mined, in tons) is 0.12:1. Approximately 1.4 billion tons of material are planned to be mined during the production phase.

The Project production fleet would use the most efficient mining equipment available to minimize fuel consumption per ton of rock moved. Most mining equipment would be diesel-powered. This production fleet would ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Copper Payable metal M lbs 6,153
Copper Metal in concentrate M lbs 3206,409
Copper Concentrate kt 55911,181
Molybdenum Concentrate kt  ......  Subscription required  ......  Subscription required
Molybdenum Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required
Molybdenum Payable metal M lbs  ......  Subscription required
Gold Payable metal koz  ......  Subscription required
Gold Metal in concentrate koz  ......  Subscription required  ......  Subscription required
Silver Payable metal koz  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required
Rhenium Payable metal t  ......  Subscription required
Rhenium Metal in concentrate t  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Stripping / waste ratio  ......  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 capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual mining rate  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at August 18, 2020:
The base case Mineral Resource estimate is reported above a 0.30% CuEq cut-off.

CategoryTonnage CommodityGradeContained Metal
Measured 527,000,000 t Copper 0.33 % 3.83 B lbs
Measured 527,000,000 t Molybdenum 178 ppm 0.21 B lbs
Measured 527,000,000 t Gold 0.35 g/t 5.93 M oz
Measured 527,000,000 t Silver 1.7 g/t 28.1 M oz
Measured 527,000,000 t Rhenium 0.32 ppm 167,000 kg
Measured 527,000,000 t Copper Equivalent 0.65 %
Indicated 5,929,000,000 t Copper 0.41 % 53.58 B lbs
Indicated 5,929,000,000 t Molybdenum 246 ppm 3.21 B lbs
Indicated 5,929,000,000 t Gold 0.34 g/t 64.81 M oz
Indicated 5,929,000,000 t Silver 1.7 g/t 316.4 M oz
Indicated 5,929,000,000 t Rhenium 0.41 ppm 2,443,000 kg
Indicated 5,929,000,000 t Copper Equivalent 0.77 %
Measured & Indicated 6,456,000,000 t Copper 0.4 % 56.92 B lbs
Measured & Indicated 6,456,000,000 t Molybdenum 240 ppm 3.42 B lbs
Measured & Indicated 6,456,000,000 t Gold 0.34 g/t 70.57 M oz
Measured & Indicated 6,456,000,000 t Silver 1.7 g/t 344.6 M oz
Measured & Indicated 6,456,000,000 t Rhenium 0.41 ppm 2,615,000 kg
Measured & Indicated 6,456,000,000 t Copper Equivalent 0.76 %
Inferred 4,454,000,000 t Copper 0.25 % 24.54 B lbs
Inferred 4,454,000,000 t Molybdenum 226 ppm 2.22 B lbs
Inferred 4,454,000,000 t Gold 0.25 g/t 35.8 M oz
Inferred 4,454,000,000 t Silver 1.2 g/t 170.4 M oz
Inferred 4,454,000,000 t Rhenium 0.36 ppm 1,603,000 kg
Inferred 4,454,000,000 t Copper Equivalent 0.55 %

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Copper Equivalent USD  ......  Subscription required&nbs
C1 cash costs Copper Equivalent USD  ......  Subscription required&nbs
C1 cash costs Gold USD  ......  Subscription required&nbs
Assumed price Rhenium USD  ......  Subscription required&nbs
Assumed price Molybdenum USD  ......  Subscription required&nbs
Assumed price Copper USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2022
OP mining costs ($/ton mined) USD 1.61 *
OP mining costs ($/ton milled) USD  ......  Subscription required
Processing costs ($/ton milled) USD  ......  Subscription required
G&A ($/ton milled) USD  ......  Subscription required
Total operating costs ($/ton milled) USD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 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 5,380
Transportation (haulage) costs $M USD 1,127
G&A costs $M USD 1,136
Total OpEx $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
EBITDA (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
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax NPV @ 7% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
After-tax NPV @ 7% $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
Subscription required - Subscription is required.

Pipelines
Source: Subscription required


Proposed Heavy Mobile Equipment as of October 1, 2022:
HME TypeSizeQuantity
Cable reel truck ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 22, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 22, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 22, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Apr 28, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Corporate Presentation 2018
Technical Report 2018
Financial Review 2016
Annual Report 2015
Technical Report 2014
Other 2013
Preliminary Economic Assessment 2011
Subscription required - Subscription is required.

News:

NewsDate
Northern Dynasty Minerals Ltd.: Final Determination for Pebble Deposit Area January 30, 2023

Subscription required - Subscription is required.

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