The Madonna No. 2 is a quartz and feldspar mine located in Jefferson county, Colorado at an elevation of 7,080 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
Elevation: 7,080 Feet (2,158 Meters)
Commodity: Quartz, Feldspar
Lat, Long: 39.37715, -105.19462
Map: View on Google Maps
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Madonna No. 2 MRDS details
Site Name
Primary: Madonna No. 2
Secondary: Deep Hole Mine
Secondary: Madonna No. 2 Mine
Commodity
Primary: Quartz
Primary: Feldspar
Secondary: REE
Location
State: Colorado
County: Jefferson
District: South Platte Pegmatite District
Land Status
Land ownership: National Forest
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
Type: Surface
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Surface
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: CIRCULAR, OVAL
Structure
Type: R
Description: Front Range Uplift, Pikes Peak Batholith
Type: L
Description: Kennedy Gulch Fault Zone
Alterations
Not available
Rocks
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Gadolinite
Ore: Allanite
Ore: Quartz
Ore: Microcline
Gangue: Fluorite
Comments
Comment (Deposit): CIRCULAR TO OVAL ZONED PEGMATITE CONSISTS OF WALL ZONE OF QUARTZ-MICROCLINE-BIOTITE, RELATIVELY LARGE QUARTZ-MICROCLINE CORE, AND CORE-MARGIN ZONE OF MINOR FLUORITE AND REPLACEMENT ALLANITE-GADOLINITE.
Comment (Location): SOUTH OF SPRING CREEK BETWEEN MADONNA 1, MADONNA 3, AND HOLLINGSWORTH PEGMATITES ; INFO FROM LAND.ST :(1975)
Comment (Workings): OPEN CUT
Comment (Orebody): Orebody is 60' X 75', approx. circular. Wall zone. Core is composite quartz plus microcline. Replacement Unit. Described as "very deep. (about 50') cut into vertical core; core margin contains large 6-8 inch allanite crystals and minor fluorite. Mined for quartz and microcline." (RS-11, p. 98)
Comment (Location): Described in RS-11 (p. 98) as "Easternmost pegmatite of the SE4 of the SW4 of sec. 2,", #19 on pl. 1 of RS-11. However, E-most in that section is also the southermost, which would fit the description of Madonna No. 1. Therefore, coordinates are for the next pit on topo to the north of the southmost pit, at a very deep hole that fits description of deposit.
Comment (Commodity): RS-11 does not mention gadolinite at this location. See Madonna No. 3.
References
Reference (Deposit): HAYNES, C.V., JR., 1965, GENESIS OF THE WHITE CLOUD AND RELATED PEGMATITES, SOUTH PLATTE AREA, JEFFERSON COUNTY, COLORADO: GSA BULL., V. 76, NO. 4, P. 441-462.
Reference (Deposit): PETERSON, W.L., 1964, GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO: USGS BULL. 1181-C, 23 P., 1 PL.
Reference (Deposit): SIMMONS, W.B., AND HEINRICH, E.W., 1980, RARE-EARTH PEGMATITES OF THE SOUTH PLATTE DISTRICT, COLORADO: CGS RESOURCE SER. 11, 131 P.
Pages: 319, pl. 1, p. 97-98.
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