- Mineral Resources
- Online Spatial Data
- Global assessment of undiscovred copper resources
Kluane Arc and Tertiary Kuskokwim Mountains volcanic-plutonic belt (continuation of Canadian Cordilleran continental arc); north of the Denali Fault
| Tract ID |
003pCu5003 |
| Country |
United States of America |
| Commodity |
Cu |
| Study area name |
United States revised - Alaska |
| Tectonic setting |
continental margin |
| Deposit type |
porphyry copper |
| Grade-tonnage model |
Canadian Cordillera Porphyry Cu±Mo±Au (Frost and others, 2011) |
| Geologic age |
| Geologic feature age |
Tertiary |
| Generalized age |
Tertiary |
| Oldest rocks age |
60Ma
|
| Youngest rocks age |
0Ma
|
| Age range |
60Ma
|
|
| Identified Cu resources |
2,200,000metric tons
|
| Mean Cu (t/sq km) |
45t/sq km
|
| Map scales used |
250K |
Results of the assessment
| Assessment date |
2012 |
| Estimators |
Steve Ludington, Jane Hammarstrom, Gilpin Robinson, and 1996 Team |
| Assessment depth |
1km
|
| Quantitative assessment |
Yes |
Estimated number of deposits
| Number of deposits |
Confidence level |
| 2 |
90% |
| 8 |
50% |
| 10 |
10% |
| 14 |
5% |
| 18 |
1% |
|
| Mean estimated deposits |
7.09 |
±3.97 |
(0.56%) |
| Probability of mean |
0.42 |
| Probability of no copper |
0.04 |
Estimated deposit density
Known
deposits |
Total
deposits |
Area
(sq km) |
Deposit density
per 100,000 sq km |
| 2 |
9.09 |
200,550 |
5 |
Mean estimated tonnage
| Copper |
9,100,000 |
| Molybdenum |
390,000 |
| Gold |
470 |
| Silver |
3,200 |
| Ore |
3,400 |
Undiscovered copper resource
| Confidence level |
95% |
90% |
50% |
10% |
5% |
| Tonnage |
290,000 |
1,200,000 |
7,900,000 |
18,000,000 |
22,000,000 |
Economic analysis
| Fraser country |
US-Alaska |
| Fraser type |
0.23%
|
| Fraser high |
0.76%
|
| Typical cost |
0%
|
| High cost |
1%
|
| Infrastructure setting |
High cost |
| Comments on depth |
skew deep |
| Expected depth distribution |
|---|
| 0 - 250m |
0.1 |
| 250m - 500m |
0.3 |
| 500m - 1km |
0.6 |
| Economically recoverable resources |
|---|
| Copper |
210,000t
|
| Molybdenum |
5,100t
|
| Gold |
0t
|
| Silver |
40t
|
| Probability no econ recoverable |
0.98 |
| Econ NPV |
15x $1M
|
| Exp dollars |
-7.55x $1M/100,000 sq km
|
| Exp value class |
Very Low |
Bibliographic references
| General |
U.S. Geological Survey National Mineral Resource Assessment Team (2002) |
| Economic |
Robinson and Menzie (2012) |
U.S. Geological Survey National Mineral Resource Assessment Team, 2002, Assessment of undiscovered deposits of gold, silver, copper, lead, and zinc in the United StatesA portable document (pfd) recompilation of USGS Open-file Report 96-96 and Circular 1178, recompiled by Paul Schruben: U.S. Geological Survey Open-File Report 02-198, http://pubs.usgs.gov/of/2002/of02-198/.Robinson, G.R., Jr., and Menzie, W.D., 2012, Economic filters for evaluating porphyry copper deposit resource assessments using grade-tonnage deposit models, with examples from the U.S. Geological Survey global mineral resource assessment (ver 1.2, March 2014): U.S. Geological Survey Scientific Investigations Report 20105090H, 21 p., http://pubs.usgs.gov/sir/2010/5090/h/.
Deposits and prospects associated with this tract
| Name |
Type |
State |
Country |
Development |
Details |
| Airplane Ridge |
prospect |
Alaska |
United States |
Prospect |
Details |
| Baggage |
prospect |
Alaska |
United States |
Prospect |
Details |
| Bluff |
prospect |
Alaska |
United States |
Prospect |
Details |
| Boulder Creek |
prospect |
Alaska |
United States |
Prospect |
Details |
| Bush |
prospect |
Alaska |
United States |
Prospect |
Details |
| Elephant Mountain |
prospect |
Alaska |
United States |
Prospect |
Details |
| Little Enchilada |
prospect |
Alaska |
United States |
Prospect |
Details |
| McLeod |
prospect |
Alaska |
United States |
Prospect |
Details |
| Mosquito |
prospect |
Alaska |
United States |
Prospect |
Details |
| Mount Fairplay |
prospect |
Alaska |
United States |
Prospect |
Details |
| Oreo |
prospect |
Alaska |
United States |
Prospect |
Details |
| Peternie |
prospect |
Alaska |
United States |
Prospect |
Details |
| Pika Canyon |
prospect |
Alaska |
United States |
Prospect |
Details |
| Ptarmigan Creek |
prospect |
Alaska |
United States |
Prospect |
Details |
| Pushbush |
prospect |
Alaska |
United States |
Prospect |
Details |
| Quartz-Porphyry |
prospect |
Alaska |
United States |
Prospect |
Details |
| Round Top |
deposit |
Alaska |
United States |
Occurrence |
Details |
| Round Top |
prospect |
Alaska |
United States |
Prospect |
Details |
| Section 21 |
prospect |
Alaska |
United States |
Prospect |
Details |
| Taurus |
deposit |
Alaska |
United States |
Prospect |
Details |
| Triple Z |
prospect |
Alaska |
United States |
Prospect |
Details |
| North Peternie |
prospect |
Alaska |
United States |
Prospect |
Details |
| Shady Ridge |
prospect |
Alaska |
United States |
Prospect |
Details |
