- Mineral Resources
- Online Spatial Data
- Global assessment of undiscovred copper resources
Alaska Peninsula and Aleutian Islands
Tertiary felsic to intermediate composition intrusions of the Alaska Peninsula and Aleutian Islands
| Tract ID |
003pCu5006 |
| Country |
United States of America |
| Commodity |
Cu |
| Study area name |
United States revised - Alaska |
| Tectonic setting |
mixed |
| Deposit type |
porphyry copper |
| Grade-tonnage model |
General porphyry copper model (Singer and others, 2008) |
| Geologic age |
| Geologic feature age |
Tertiary |
| Generalized age |
Tertiary |
| Oldest rocks age |
60Ma
|
| Youngest rocks age |
0Ma
|
| Age range |
60Ma
|
|
| Identified Cu resources |
590,000metric tons
|
| Known prospects |
9 |
| Mean Cu (t/sq km) |
242t/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 |
| 1 |
90% |
| 3 |
50% |
| 6 |
10% |
| 6 |
5% |
| 6 |
1% |
|
| Mean estimated deposits |
3.23 |
±1.88 |
(0.58%) |
| Probability of mean |
0.38 |
| Probability of no copper |
0.07 |
Estimated deposit density
Known
deposits |
Total
deposits |
Area
(sq km) |
Deposit density
per 100,000 sq km |
| 1 |
4.23 |
49,650 |
9 |
Mean estimated tonnage
| Copper |
12,000,000 |
| Molybdenum |
340,000 |
| Gold |
310 |
| Silver |
4,100 |
| Ore |
2,600 |
Undiscovered copper resource
| Confidence level |
90% |
50% |
10% |
5% |
| Tonnage |
270,000 |
5,900,000 |
28,000,000 |
46,000,000 |
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 |
default |
| Expected depth distribution |
|---|
| 0 - 250m |
0.25 |
| 250m - 500m |
0.25 |
| 500m - 1km |
0.5 |
| Economically recoverable resources |
|---|
| Copper |
5,900,000t
|
| Molybdenum |
130,000t
|
| Gold |
110t
|
| Silver |
1,900t
|
| Probability no econ recoverable |
0.66 |
| Econ NPV |
1,100x $1M
|
| Exp dollars |
11.16x $1M/100,000 sq km
|
| Exp value class |
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 |
| unnamed |
prospect |
Alaska |
United States |
Prospect |
Details |
| unnamed |
prospect |
Alaska |
United States |
Prospect |
Details |
| Warner Bay |
prospect |
Alaska |
United States |
Prospect |
Details |
| Bee Creek |
prospect |
Alaska |
United States |
Prospect |
Details |
| Bee Creek |
prospect |
Alaska |
United States |
Prospect |
Details |
| Four Bear |
prospect |
Alaska |
United States |
Prospect |
Details |
| Mike |
prospect |
Alaska |
United States |
Prospect |
Details |
| Pyramid |
deposit |
Alaska |
United States |
Prospect |
Details |
| Rex |
prospect |
Alaska |
United States |
Prospect |
Details |
| Ivanof |
prospect |
Alaska |
United States |
Prospect |
Details |
