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Enterprise Vein Occurrence, Eldora, Caribou District, Boulder Co., Colorado, USA

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Latitude & Longitude (WGS84): 39° 57' 0'' North , 105° 35' 9'' West
Latitude & Longitude (decimal): 39.95000,-105.58583
Köppen climate type:Dfc : Subarctic climate


REF:Deposit:: LOVERING & GODDARD, 1950, USGS PP 223, PG. 197 AND PL. 3(NORTH HALF)
Deposit:: CONSV. DIV. COMP. DATE, 10,62
Commodities (Major) - Gold
Deposit Type: Vein
Development Status: Occurrence


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


9 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleocene - Late Cretaceous
56 - 100.5 Ma



ID: 2212291
Rocks of Montezuma stock and vicinity, older felsic to intermediate porphyries of alkali-calcic group

Age: Phanerozoic (56 - 100.5 Ma)

Description: Large stocks, adjacent smaller bodies, and dikes in Nederland area and in southern Empire and northern Georgetown 7.5-minute quadrangles. Includes the Caribou, Bryan Mountain (also called Eldora), and Apex stocks. Includes monzogranite, monzogranite porphyry, biotite-hornblende±pyroxene monzogranite (Gable, 1969), and granodiorite (Ed Dewitt, written commun., 2007). K-Ar age of Caribou stock is 68.2±4.1 Ma on hornblende and 65.5±2.4 Ma on biotite (Marvin and others 1989). K-Ar age on Bryan Mountain stock is 60.6±1.8 Ma on biotite (McDowell, 1971; Marvin and others, 1974)

Reference: Kellogg, K.S., Shroba, R.R., Bryant, Bruce, and Premo, W.R. Geologic Map of the Denver West 30' x 60' Quadrangle, North- Central Colorado. USGS Geologic Investigations Series 3000. [35]

Paleoproterozoic
1600 - 2500 Ma



ID: 2979176
Felsic and hornblendic gneisses, either separate or interlayered

Age: Proterozoic (1600 - 2500 Ma)

Description: Includes metabasalt, metatuff, and interbedded metagraywacke; locally contains interlayered biotite gneiss. Derived principally from volcanic rocks

Lithology: Major:{gneiss}, Minor:{metabasalt,metagraywacke}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Paleoproterozoic
1600 - 2500 Ma



ID: 3186950
Paleoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1600 - 2500 Ma)

Lithology: Orthogneiss/paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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