Pearl Mine

The Pearl Mine is a copper and gold mine located in Powell county, Montana at an elevation of 6,640 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Pearl Mine

Commodity

Primary: Copper
Primary: Gold

Location

State: Montana
County: Powell
District: Top O'Deep District

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement Vein
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Garnet Range

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: R
Description: Bearmouth Overthrust

Type: L
Description: Garnet Stock

Alterations

Alteration Type: L
Alteration Text: Oxidation

Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Analytical Data

Analytical Data: 150 FT LEVEL NARROW VERTICAL PIPE OF ORE $20-200/TON AU-CU.

Materials

Ore: Chrysocolla
Ore: Malachite
Ore: Gold
Gangue: Garnet
Gangue: Quartz
Gangue: Pyrite

Comments

Comment (Location): ON DIVIDE BETWEEN DEEP CR AND BILK GULCH.

Comment (Production): $20000 GOLD-COPPER ORE

Comment (Geology): 2 KINDS OF QUARTZ VEINS (1) COARSE CRYSTALLINE THAT INCLOSES SULPHIDES (2) FLINTY QUARTZ THAT CONTAINS CHRYSOCOLL , MALACHITE, AND COPPER OXIDES.

Comment (Workings): 300 VERTICAL SHAFT WITH LEVELS AT 100, 150, 200, 300 FT., OPEN PITS

Comment (Location): Political location in record is Powell county. However, lat/long plot 100m inside adjacent Granite county. Original coordinates for were: lat/long NAD27 46-49-18N 113-15-22W (46.82167 -113.25611); UTM N E Z; PLSS line# 1: Meridian- Montana Principal, TWNSHP 012N, RNG 013W, Sect 05, Sect_fract CENTER OF SE. The PLSS and UTM coordinates agree with the old lat/long. Geonames shows almost identical lat/long coordinates falling just inside Powell county using NAD83 datum. Recalculating lat/long using NAD83 datum moves point very close to location on topo sheet. So the Geonames location was used. Geonames shows 2 other locations for this deposit in Granite county so Granite county was added to the record. The PLSS section_fraction information was deleted and UTM was cleared.

References

Reference (Production): USGS BULL 660

Reference (Deposit): USGS BULL 660, P. 205-12

Principal Gold Districts of Montana

In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.