Yeoval

Continental magmatic arc of Late Silurian to Early Devonian age in the Lachlan Orogen
Tract ID 009pCu8003
Country Australia
Commodity Cu
Study area name Australia
Tectonic setting continental margin
Deposit type porphyry copper
Grade-tonnage model Eastern Australia custom model (Bookstrom, 2013)
Geologic age
Geologic feature age Late Silurian through Devonian
Generalized age Paleozoic
Oldest rocks age 422.9Ma
Youngest rocks age 387Ma
Age range 35.9Ma
Identified Cu resources 49,000metric tons
Known prospects 7
Mean Cu (t/sq km) 1t/sq km
Map scales used 1M

Results of the assessment

Assessment date 2010
Estimators Bookstrom, Arthur A.(USGS); Glen, Richard A. (GSNSW); Hammarstrom, Jane M.(USGS); Robinson, Gilpin R. (USGS); Zientek, Michael L. (USGS)
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
1 90%
1 50%
2 10%
3 5%
3 1%
Mean estimated deposits 1.31 ±0.75 (0.57%)
Probability of mean 0.3
Probability of no copper 0.24

Estimated deposit density

Known
deposits
Total
deposits
Area
(sq km)
Deposit density
per 100,000 sq km
1 2.31 53,157 4

Mean estimated tonnage

Copper 71,000
Ore 30

Undiscovered copper resource

Confidence level 50% 10% 5%
Tonnage 25,000 210,000 310,000

Economic analysis

Fraser country Australia
Fraser type 0.71%
Fraser high 0.29%
Typical cost 1%
High cost 0%
Infrastructure setting Typical
Comments on depth default
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Probability no econ recoverable 1
Exp dollars -5.41x $1M/100,000 sq km
Exp value class Very Low

Bibliographic references

General Bookstrom and others (2014)
Economic Robinson and Menzie (2012)

Deposits and prospects associated with this tract

Name Type State Country Development Details
Dogwood prospect Victoria Australia Prospect Details
Frogmore prospect New South Wales Australia Prospect Details
Yeoval deposit New South Wales Australia Prospect Details
Sunday Creek prospect Victoria Australia Prospect Details