Montana · Missoula County
Past Producer

Cook Prospect

Missoula County, Montana, United States
ManganeseSilverGold
⌖ Show on mapUSGS source ↗
Description

A.B. Cook

Commodities
PrimaryManganese
SecondarySilver, Gold
Commodity typeM
Deposit
Deposit typeReplacement
Deposit sizeS
WorkingsUnknown
Orebody formTABULAR-IRREGULAR
Ore controlFavorable Bed In Cambrian Limestone Overlain By Marker Zone Of Interbedded Shale And Limestone.
Materials
Ore mineralsGold, Pyrolusite, Wad
GangueChalcedony
Geology
Host rockLimestone
StructureHigh Angle Reverse Fault Trending Nw And Dipping 50 Deg. Sw Separates Precambrian And Cambrian Rock., High Angle Reverse Fault Is Sw Limit Of Ore
Economic & production
Development statusPast Producer
First production1917
Discovery year1917
Identification
Deposit ID10098497
MRDS IDM060194
Alternate namesArrowhead Lease
RegionNA
Data scoreB
Coordinates46.73739, -113.60093
References
MBMG BULL 8, P. 15, 32MBMG BULL 8.