GRADE AND TONNAGE MODEL OF SOUTHEAST MISSOURI Pb-Zn AND APPALACHIAN Zn DEPOSITS

By Dan L. Mosier and Joseph A. Briskey

COMMENTS The models for stratabound carbonate-hosted Pb-Zn deposits, and for stratabound carbonate-hosted Zn deposits, are treated as end members that, in a general way, define a larger class of geologically complex stratabound carbonate-hosted deposits containing variable proportions of Pb or Zn. Grade-tonnage estimates were made for districts only, because of difficulties in defining the limits of an individual deposit within these typically large regionally mineralized systems. Numerous small districts containing less than about a million tonnes of ore are not included in this compilation, mainly because of the paucity of reliable data about reserves and past production, but also because they are outside the scope of this investigation. Lead grade is correlated with silver grade (r = 0.87, n = 10). See figs. 168-171.

Figure 168. Tonnages of southeast Missouri Pb-Zn and Appalachian Zn deposits.

Figure 169. Zinc grades of southeast Missouri Pb-Zn and Appalachian Zn deposits.

Figure 170. Lead grades of southeast Missouri Pb-Zn and Appalachian Zn deposits.

Figure 171. Silver grades of southeast Missouri Pb-Zn and Appalachian Zn deposits.

DEPOSITS

Name Country

Alpine-Lafatsch ASTR-ITLY-YUGO

Austinville USVA

Central Missouri USMO

Central Tennessee USTN

East Tennessee USTN

Friedensville USPA

Gayna R.-Godlin L. CNNT

Kentucky-Illinois USKN

Metalline USWA

Monarch-Kicking Horse CNBC

Nanisivik CNNT

Newfoundland Zinc CNNF

North Arkansas-Ozark USAR

Pine Point CNNT

Polaris-Eclipse CNNT

Robb Lake CNBC

Southeast Missouri USMO

Tri State USMO-USOK

Upper Mississippi Valley USWI

Upper Silesia PLND