Property Details
Property ID:
372Property Name:
PebbleLatitude/Longitude:
59.8991/-155.2807Commodities Major:
Cu, AuCritical Minerals from ARDF:
Sb, As, Re, TeCommodity Group:
Porphyry (Copper, Gold, Molybdenum)Deposit Type:
PorphyryResource Public:
YesPast Producer:
NoARDF Primary:
IL007ARDF Related:
IL007
Interpreted mineral system (using mineral system classification of Hofstra and Kreiner, 2020*)
System Name:
Porphyry Cu-Mo-AuDeposit Type:
Porphyry/skarn copperPrincipal Commodities:
Cu, Au, Ag, MoCritical Minerals:
PGE, Te, Re, Co, Bi, U
Activity by Year
| Year |
Activity |
Status |
Operator |
Project Name |
Description |
| 2017 |
Exploration |
Exploration Project |
Pebble Limited Partnership |
|
The Pebble Limited Partnership (PLP) has invested more than $750 million in the Pebble project, principally on geological, environmental, engineering, and other technical studies aimed toward the development of the mine plan and permit applications. In July 2017, EPA initiated steps to withdraw its proposed determination restricting development at the Pebble project. In October 2017, PLP presented new development concepts for Pebble to address stakeholder concerns. These include reducing the footprint of the project?s major mine facilities (open pit, tailings storage facility) to roughly 5.9 square miles, about half of the prior envisioned size. |
| 2018 |
Exploration |
Exploration Project |
Pebble Limited Partnership |
|
Alaska?s DNR issued PLP a permit to carry out exploration and reclamation activities during the 2018 field season. DNR plans multiple inspections during 2018 to monitor both the drilling of new boreholes and continued PLP reclamation activity. |
| 2019 |
Exploration |
Exploration Project |
Pebble Limited Partnership |
|
PLP spent a total of $53 million on the project in 2019, including $19 million on engineering studies and $14.7 million on environmental studies. Site work included geophysical and geotechnical work in support of engineering and permitting of the project?s ferry landing and seafloor natural gas pipeline, as well as geotechnical drilling in support of groundwater modeling at the proposed mine site. |
Production Stats
| Year |
Total Rock Mined (short tons) |
Waste Rock (short tons) |
Ore Mined (short tons) |
Ore Milled (short tons) |
Heap Leach Ore (short tons) |
Total Concentrate Produced (short tons) |
Pb Ore Grade % |
Pb Recovered (short tons) |
Zn Ore Grade % |
Zn Recovered (short tons) |
Au Head/Ore Grade (OPT) |
Au Recovered (troy ounces) |
Au Recovery % |
Ag Ore Grade (OPT) |
Ag Recovered (million troy ounces) |
Coal (short tons) |
Other |
Other Amount |
Other Units |
Resources
| Source |
Year |
Description |
Property Phase |
Category |
Resource (short tons) |
Cu % |
Cu (thousand pounds) |
Pb % |
Pb (thousand pounds) |
Zn % |
Zn (thousand pounds) |
Au (OPT) |
Au (thousand oz) |
Ag (OPT) |
Ag (thousand oz) |
Mo % |
Mo (thousand pounds) |
Co % |
Co (thousand pounds) |
Barite % |
Barite (thousand pounds) |
TREO % |
TREO (thousand pounds) |
Graphite % |
Graphite (thousand pounds) |
| https://www.northerndynastyminerals.com/pebble-project/reserves-resources/; accessed August 31, 2018 |
2018 |
.3 CuEq cut off |
Advanced Exploration (0.3 CuEq cut-off) |
Measured |
5.809121E8 |
0.33 |
3830000 |
|
|
|
|
0.010208 |
5930.0 |
0.049583 |
28100.0 |
0.0178 |
210000.0 |
|
|
|
|
|
|
|
|
|
| https://www.northerndynastyminerals.com/pebble-project/reserves-resources/; accessed August 31, 2018 |
2018 |
.3 CuEq cut off |
Advanced Exploration (0.3 CuEq cut-off) |
Indicated |
6.5355367E9 |
0.41 |
53580000 |
|
|
|
|
0.009917 |
64810.0 |
0.049583 |
316400.0 |
0.0246 |
3200000.0 |
|
|
|
|
|
|
|
|
|
| https://www.northerndynastyminerals.com/pebble-project/reserves-resources/; accessed August 31, 2018 |
2018 |
.3 CuEq cut off |
Advanced Exploration (0.3 CuEq cut-off) |
Inferred |
4.9096442E9 |
0.25 |
24540000 |
|
|
|
|
0.007292 |
35800.0 |
0.035 |
170400.0 |
0.0226 |
2180000.0 |
|
|
|
|
|
|
|
|
|
| https://www.northerndynastyminerals.com/pebble-project/reserves-resources/; accessed August 31, 2018 |
2018 |
Previously SR67 80.6 billion pounds of copper, 107.4 million ounces of gold, and 5.6 billion pounds of molybdenum |
|
Total |
1.2026093E10 |
0.340816 |
81950000 |
|
|
|
|
0.008859 |
106540.0 |
0.04363 |
514900.0 |
0.023455 |
5590000.0 |
|
|
|
|
|
|
|
|
|
* Hofstra, A.H., and Kreiner, D.C., 2020, Systems-Deposits-Commodities-Critical Minerals Table for the Earth Mapping Resources Initiative: U.S. Geological Survey Open-File Report 2020-1042, 24 p., https://doi.org/10.3133/ofr20201042