GRADE AND TONNAGE MODEL OF DISTAL DISSEMINATED Ag-Au
By Dennis P. Cox and Donald A. Singer
COMMENTS
Estimated premining tonnages and grades from the deposits listed in table
5 were used to construct the model. Where several different estimates
were available for a deposit, the estimated tonnage associated with lowest
cutoff grades was used. No significant correlations between grades and
tonnages were observed. See appendix
B for locality abbreviations. See introduction
for explanation of the grade and tonnage model as shown in figures 5-7.
Table 5. Grades and tonnages of distal
disseminated Ag-Au deposits
[Tonnages
in million metric tons; silver (Ag) and gold (Au) grades in grams per
metric ton. Country and state abbreviations explained in appendix
B]
Deposit
Country
Tonnage
Au
grade Ag
grade
Candelaria
USNV
27.0
0.19
50
Cove
USNV
81.0
1.80
92.5
Fresnillo
MXCO
19.0
.22
141.6
Hardshell
USAZ
6.0
0
245.0
Hilltop
USNV
10.4
2.50
2.0
Purisima
Concepcion PERU
.20
3.10
7.5
Real
de Angeles MXCO
66.0
0
66.6
Star
Pointer USNV
1.36
4.80
10.3
Taylor
USNV
7.0
0
103.0
Tecoma
USUT
1.5
1.56
93.3
Figure 5. Tonnages of distal disseminated
Ag-Au deposits.
Figure 6. Gold grades of distal disseminated
Ag-Au deposits.
Figure 7. Silver grades of distal disseminated
Ag-Au deposits.
