The Iron Dike is a mine located in Larimer county, Colorado at an elevation of 11,440 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: 11,440 Feet (3,487 Meters)
Commodity:
Lat, Long: 40.39361, -105.69500
Map: View on Google Maps
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Iron Dike MRDS details
Site Name
Primary: Iron Dike
Commodity
Tertiary: Iron
Tertiary: Titanium, Metal
Location
State: Colorado
County: Larimer
District: Trail Ridge Area
Land Status
Land ownership: National Park
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
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
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: TABULAR
Structure
Type: R
Description: Front Range Uplift, Silver Plume Batholith, Boulder Creek Batholith
Type: L
Description: Nw-Trending Faults
Alterations
Alteration Type: L
Alteration Text: Sericitization Of Plagioclase In Wallrock; Chloritization Of Pyrox Ene; Limonite Replacement Of Augite And Chlorite
Rocks
Name: Diabase
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Diabase
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: ANALYSIS OF AUGITE FROM TRAIL RIDGE EXPOSURE SHOWED 49.23% SIO2, 0 .35% TIO2, 5.73% AL203, 1.02% FE203, 14.70% FEO, 0.30% MNO, 11.90% MGO , 14.89% CAO, 0.92% NA20, 0.66% K20, 0.19% P205. ANALYSIS OF FRESH DIA BASE AT CONTACT WITH GRANITE SHOWED 48.71% SIO2, 0.74% TIO2, 16.47% AL 203, 2.90% FE203, 12.01% FEO, 0.19% MNO, 4.47% MGO, 7.85% CAO, 4.60% N A20, 1.17% K20, 0.53% P205, 0.78% H20.
Materials
Gangue: Biotite
Gangue: Quartz
Gangue: Apatite
Gangue: Labradorite
Gangue: Augite
Gangue: Limonite
Gangue: Sillimanite
Comments
Comment (Location): DIKE IS NEARLY CONTINUOUS FROM NW TO SE THROUGH SW LARIMER COUNTY AND WEST-CENTRAL BOULDER COUNTY. TOWNSHIPS LISTED ABOVE ARE ALL LARIME R COUNTY. IN BOULDER COUNTY, DIKE EXTENDS THROUGH T3N, R73W; T2N, R72W ; T1N, R72W; AND T1S, R71W. WAHLSTROM EXAMINED EXPOSURES ON FALL RIVER SOUTH OF MOUNT CHAPIN (APPROX SEC. 05, T5N, R74W) AND ON TRAIL RIDGE ROAD. ELEV AND LAT-LONG GIVEN ARE FOR RANGER STATION ON TRAIL RIDGE RO AD IN APPROX SW SEC. 16, T5N, R74W. ; INFO FROM LAND.ST :1977
Comment (Deposit): DIABASE DIKE CONTAINING FE-RICH MINERALS AND LIMONITE-STAINED WEA THERING PRODUCTS TRENDS GENERALLY N30W, 60 TO 80 SW, PARALLEL TO ARE A BRECCIA REEFS, CHARACTERISTICALLY 50 TO 100 FT WIDE BUT IN PLACES ONL Y A FEW FEET OR INCHES, INTERSECTED AND OFFSET BY NUMEROUS EAST-WEST-T RENDING FAULTS, SOME OF WHICH HAVE LOCALIZED W MINERALS AND TELLURIDES SUCH AS IN BOULDER CO. GRAIN SIZE INCREASES INWARD FROM CHILLED WALL R OCK CONTACTS. AVERAGE MODAL COMPOSITION (VOL%): 49.8% LABRADORITE, 38. 4% AUGITE, 8.5% TITANIFEROUS MAGNETITE, 2.3% QUARTZ, 1.0% ORTHO CLASE. TITANIFEROUS MAGNETITE OCCURS AS EQUANT CRYSTALS, PLATES, SKELETAL DE NDRITIC CRYSTALS AND IN VEINS FILLING FRACTURES IN PYROXENE AND PLAGIO CLASE. DIKE PREVIOUSLY THOUGHT TO BE LARAMIDE IN AGE AND CORRELATED WI TH OTHER MAFIC INTRUSIVES IN AREA, BUT WAHLSTROM'S CHEMICAL ANALYSES S HOWED DIFFERENCES THAT SUGGEST IT FORMED SEPARATELY; STATE GEOLOGIC MA P SHOWS DIKE TO BE PREC Y AGE.
References
Reference (Deposit): WAHLSTROM, E.E., 1956, PETROLOGY AND WEATHERING OF THE IRON DIKE, B OULDER AND LARIMER COUNTIES, COLORADO: GSA BULL., V. 67, NO. 2, P. 147 -163.
Reference (Deposit): BOOS, M.F., AND BOOS, C.M., 1933, IRON DIKE (ABS.): GSA BULL., V. 4 4, P. 73.
Reference (Deposit): CRAWFORD, R.D., 1908, GEOLOGY AND PETROLOGY OF THE SUGARLOAF DISTRI CT: UNIV. COLORADO STUDIES, V. 6, P. 97-131.
Reference (Deposit): LOVERING, T.S., AND GODDARD, E.N., 1938, LARAMIDE IGNEOUS SEQUENCE AND DIFFERENTIATION IN THE FRONT RANGE, COLORADO: GSA BULL., V. 49, P. 35-68.
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