1. Mineral Resources
  2. Online Spatial Data
  3. National Mineral Resource Assessment 1998

Mineral assessment tracts in Madison county, Montana

[Additional scientific data in this geographic area]

NR04: Skarn Zn-Pb (18c) (Mesozoic - Tertiary) , covers 0.8 % of this area
90%50%10%5%1%
00246
NR07: Skarn Au (b1930) (Mesozoic - Tertiary) , covers 0.8 % of this area
90%50%10%5%1%
512202836
NR10: Porphyry Cu (North America) (17) (Cretaceous - Eocene) , covers 14 % of this area
90%50%10%5%1%
01367
NR13: Polymetallic replacement (19a) (Mesozoic - Tertiary) , covers 0.8 % of this area
90%50%10%5%1%
146812
NR19: Massive sulfide, kuroko (28a) (Proterozoic) , covers 15 % of this area
90%50%10%5%1%
00001
NR24: Epithermal vein, quartz-adularia (25c + 25d) (Tertiary) , covers 2 % of this area
90%50%10%5%1%
13569
NR26: Epithermal vein, quartz-alunite (25e) (Tertiary) , covers 2 % of this area
90%50%10%5%1%
00001
NR30: Hot-spring Au-Ag (25a) (Tertiary) , covers 2 % of this area
90%50%10%5%1%
13569
NR39: Sedimentary exhalative Zn-Pb (31a) (Late Proterozoic) , covers 2 % of this area
90%50%10%5%1%
02468
NR48: Homestake stratiform Au (ofr94250) (Archean) , covers 37 % of this area
90%50%10%5%1%
02456