Ajax Mica Mine

The Ajax Mica Mine is a mica mine located in Clear Creek county, Colorado at an elevation of 7,402 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: Ajax Mica Mine  

State:  Colorado

County:  Clear Creek

Elevation: 7,402 Feet (2,256 Meters)

Primary Mineral: Mica

Lat, Long: 39.74917, -105.44028

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 Ajax Mica Mine

Ajax Mica Mine MRDS details

Site Name

Primary: Ajax Mica Mine
Secondary: Floyd Hill Mica Mine


Commodity

Primary: Mica
Tertiary: Beryllium


Location

State: Colorado
County: Clear Creek
District: Clear Creek Pegmatite Province


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

Owner Name: Ralph D. Naslund And Geroge Baer
Years: 1944 -


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1895
Year Last Production: 1944
Discovery Year: 1875
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

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


Mineral Deposit Model

Not available


Orebody

Form: LENTICULAR, POD


Structure

Type: R
Description: Front Range Uplift, Denver Basin

Type: L
Description: Floyd Hill Fault Zone


Alterations

Not available


Rocks

Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic


Analytical Data

Not available


Materials

Ore: Muscovite
Ore: Beryl
Gangue: Tourmaline
Gangue: Albite
Gangue: Sericite
Gangue: Quartz
Gangue: Biotite


Comments

Comment (Deposit): ZONED PEGMATITE TRENDS GENERALLY EAST-WEST AND DIPS 30 S, CUTTING ACROSS GNEISSIC BEDDING AND SCHISTOSITY. DIKE IS CUT BY ROTATIONAL FAULT TRENDING N39 W, 75 NE. QUARTZ CORE WITH MINOR ALBITE AND MUSCOVITE IS ENCLOSED BY ALBITE-MUSCOVITE PEGMATITE. FOOTWALL OF DIKE CONTAINS CONCENTRATION OF SHEET MICA.

Comment (Workings): 123-BY 60-FT SHALLOW OPEN CUT, 32-FT ADIT, 40-FT INCLINED SHAFT

Comment (Location): ON NORTH SIDE OF CLEAR CREEK 760 FT ABOVE CREEK. ; INFO FROM LAND.ST :(1975)

Comment (Development): FIRST OPERATED FOR MICA USED IN STOVE MANUFACTURE. REOPENED IN 1944 AND YIELDED 50,900 LB SCRAP MICA, 22,927 LB MINE-RUN MICA, AND 1036 LB FULL-TRIMMED PUNCH AND SHEET MICA

Comment (Deposit): Discovery Year: LATE 1800S


References

Reference (Deposit): HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 27-29

Reference (Deposit): SHERIDAN, D.M., AND MARSH, S.P., 1976, GEOLOGIC MAP OF THE SQUAW PASS QUADRANGLE, CLEAR CREEK, JEFFERSON, AND GILPIN COUNTIES, COLORADO: USGS MAP GQ-1337

Reference (Deposit): BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, P. 115-142