GRADE AND TONNAGE MODEL OF PORPHYRY Cu, SKARN-RELATED DEPOSITS

By Donald A. Singer

DATA REFERENCES Einaudi and others (1981), Einaudi (1981)_.

COMMENTS Skarn copper deposits associated with porphyry copper deposits are included in this model. Tonnages and grades attributable to skarn were estimated for some deposits from estimated proportions of skarn provided by Einaudi and others (1981) and Einaudi (1981)_. See figs. 54-56.

Figure 54. Tonnages of porphyry Cu-skarn-related deposits.

Figure 55. Copper grades of porphyry Cu-skarn-related deposits.

Figure 56. By-product grades of porphyry Cu-skarn-related deposits. A, Silver. B, Gold. C, Molybdenum.

DEPOSITS

Name Country

Cananea (Capote) MXCO

Carr Fork USUT

Christmas USAZ

Continental USNM

Copper Basin (Battle Mt. D.) USNV

Copper Canyon USNV

Craigmont CNBC

Ely USNV

Gaspe (Needle Mountain) CNQU

Gold Coast PPNG

Lakeshore USAZ

Lyon USNV

Pima-Mission USAZ

Potrerillos CILE

Recsk HUNG

Santa Rita USNM

Silver Bell USAZ

Twin Buttes USAZ