Mineral Resources
Online Spatial Data
National Mineral Resource Assessment 1998
Mineral assessment tracts in Sweet Grass county, Montana
[
Additional scientific data in this geographic area
]
NR04: Skarn Zn-Pb (18c)
(Mesozoic - Tertiary)
, covers 2 % of this area
90%
50%
10%
5%
1%
0
0
2
4
6
NR07: Skarn Au (b1930)
(Mesozoic - Tertiary)
, covers 2 % of this area
90%
50%
10%
5%
1%
5
12
20
28
36
NR10: Porphyry Cu (North America) (17)
(Cretaceous - Eocene)
, covers 10 % of this area
90%
50%
10%
5%
1%
0
1
3
6
7
NR11: Porphyry Cu (North America) (17)
(Eocene)
, covers 1 % of this area
90%
50%
10%
5%
1%
1
4
6
7
9
NR13: Polymetallic replacement (19a)
(Mesozoic - Tertiary)
, covers 2 % of this area
90%
50%
10%
5%
1%
1
4
6
8
12
NR48: Homestake stratiform Au (ofr94250)
(Archean)
, covers 3 % of this area
90%
50%
10%
5%
1%
0
2
4
5
6
