Helena Placers

The Helena Placers is a gold mine located in Lewis and Clark county, Montana at an elevation of 4,199 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

Name: Helena Placers  

State:  Montana

County:  Lewis and Clark

Elevation: 4,199 Feet (1,280 Meters)

Primary Mineral: Gold

Lat, Long: 46.59139, -111.97917

Map: View on Google Maps

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.


Satelite image of the Helena Placers

Helena Placers MRDS details

Site Name

Primary: Helena Placers
Secondary: Last Chance Gulch
Secondary: Tenmile Creek


Commodity

Primary: Gold


Location

State: Montana
County: Lewis and Clark
District: Helena District


Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.


Holdings

Not available


Workings

Not available


Ownership

Not available


Production

Year: 1953
Time Period: 1864-1953
Mined: 29.000 mt
Material type: gold


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Placer Au-PGE
Operation Type: Unknown
Year First Production: 1864
Discovery Year: 1864
Years of Production:
Organization:
Significant: Y
Deposit Size: L


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains


Mineral Deposit Model

Model Name: Placer Au-PGE


Orebody

Form: IRREGULAR


Structure

Type: R
Description: Boulder Batholith


Alterations

Not available


Rocks

Name: Granite
Role: Associated
Age Type: Host Rock Unit
Age Young: Holocene

Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Paleocene

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Holocene


Analytical Data

Not available


Materials

Ore: Gold


Comments

Comment (Geology): GOLD CONTAINED IN QUATERNARY GRAVELS DERIVED FROM BOULDER BATHOLITH, AND LATE PRECAMBRIAN, PALEOZOIC, AND MESOZOIC SEDIMENTARY ROCKS IN THE AREA.

Comment (Deposit): IT IS STATED THAT MOST OF THE $16,000,000 RECOVERED BY 1910 WAS REMOVED DURING OR BEFORE 1868. THE GOLD IN THE GRAVELS IN THIS DISTRICT ARE THOUGHT TO HAVE BEEN DERIVED FROM LODE DEPOSITS WITHIN THE DRAINAGE BASIN OF LAST CHANCE CREEK AND ASSOCIATED TRIBUTARIES.

Comment (Location): ALTITUDE GENERALIZED AND APPROXIMATE, LOCATION GENERALIZED

Comment (Production): KOSCHMANN AND BERGENDAHL CONTAINED SOME PRODUCTION INFORMATION, BUT OF MAINLY DISTRICT PRODUCTION WHICH INCLUDED LODE DEPOSITS AND PLACERS, THUS NOT COMPLETELY APPLICABLE HERE.

Comment (Development): LAST CHANCE GULCH IS A GOLD PLACER AND WAS WORKED BY MANY PROSPECTORS, PRIMARILY BETWEEN 1864 AND 1868

Comment (Deposit): ALL OF THE GOLD PLACER DEPOSITS OF THE HELENA VALLEY ARE INCLUDED IN THE DISCUSSION, PRODUCTION FIGURES, ETC. ON THIS FORM

Comment (Workings): NO REFERENCE COULD BE FOUND STATING THE DISTANCE PLACER MINING CARRIED OUT ALONG LAST CHANCE GULCH


References

Reference (Deposit): LYDEN, C. J., 1948, THE GOLD PLACERS OF MONTANA, MONT. BUREAU OF MINES AND GEOL. MEMOIR NO. 26 P. 56-57

Reference (Deposit): KOSCHMANN AND BERGENDAHL, PRINCIPAL GOLD-PRODUCING DISTRICTS OF THE UNITED STATES, U. S. GEOLOGICAL SURVEY PROF. PAPER 610, P. 105

Reference (Production): LYDEN, C. J., 1948, THE GOLD PLACERS OF MONTANA