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Kedon

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Middle Devonian through Early Carboniferous volcanic and intrusive rocks composing a discontinuous continental margin arc associated with the Omolon microcontinent.
Tract ID 142pCu8510
Country Russian Federation
Commodity Cu
Study area name Northeast Asia
Tectonic setting continental margin
Deposit type porphyry copper
Grade-tonnage model General porphyry copper model (Singer and others, 2008)
Geologic age
Geologic feature age Devonian
Generalized age Paleozoic
Oldest rocks age 416Ma
Youngest rocks age 359.2Ma
Age range 56.8Ma
Known prospects 1
Mean Cu (t/sq km) 146t/sq km
Map scales used 1M

Results of the assessment

Assessment date 2010
Estimators Alexeiev, D. (Russian Academy of Sciences); Bookstrom, Arthur A.(USGS); Frost, Thomas P. (USGS); Hammarstrom, Jane M. (USGS); Light, Thomas D. (USGS); Ludington, Steve (USGS); Mihalasky, Mark, J. (USGS); Panteleyev, Andre (XDM Geological Consultants)
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
1 50%
2 10%
4 5%
4 1%
Mean estimated deposits 1.15 ±1.18 (1.02%)
Probability of mean 0.22
Probability of no copper 0.31

Estimated deposit density

Known
deposits		 Total
deposits		 Area
(sq km)		 Deposit density
per 100,000 sq km
1.15 30,720 4

Mean estimated tonnage

Copper 4,500,000
Molybdenum 120,000
Gold 120
Silver 1,500
Ore 890

Undiscovered copper resource

Confidence level 50% 10% 5%
Tonnage 810,000 11,000,000 18,000,000

Economic analysis

Fraser country Russian Federation
Fraser type 0.12%
Fraser high 0.88%
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 2,200,000t
Molybdenum 46,000t
Gold 41t
Silver 710t
Probability no econ recoverable 0.9
Econ NPV 380x $1M
Exp dollars 1.15x $1M/100,000 sq km
Exp value class Very Low

Bibliographic references

General Mihalasky, Ludington, Alexeiev, and others (2015)
Economic Robinson and Menzie (2012)
Mihalasky, M.J., Ludington, Steve, Alexeiev, D.V., Frost, T.P., and Light, T.D., with contributions from Bookstrom, A.A., and Panteleyev, Andre, 2015, Porphyry copper assessment of northeast Asia—Far East Russia and northeasternmost China: U.S. Geological Survey Scientific Investigations Report 2010–5090–W, 104 p., http://pubs.usgs.gov/sir/2010/5090/W/.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 2010–5090–H, 21 p., http://pubs.usgs.gov/sir/2010/5090/h/.

Deposits and prospects associated with this tract

Name Type State Country Development Details
Tabor prospect Magadanskaya oblast' Russian Federation Unknown Details