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Dixie Mine, Lamartine District, Clear Creek Co., Colorado, USA

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Latitude & Longitude (WGS84): 39° 42' 57'' North , 105° 36' 41'' West
Latitude & Longitude (decimal): 39.71583,-105.61139


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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

Mesoproterozoic
1000 - 1600 Ma
Granodiorite of Mount Evans batholith

Age: Mesoproterozoic (1000 - 1600 Ma)

Description: Gray, massive to strongly foliated, coarse-grained, mostly porphyritic biotite-hornblende granodiorite, which ranges in composition from monzogranite to tonalite (Aleinikoff and others, 1993a). Locally contains as much as 5 percent of an aplite-pegmatite phase consisting of dikes and irregular-shaped bodies of massive to weakly foliated aplite and magnetite-bearing pegmatite. Formerly believed to be part of the Early Proterozoic Routt Plutonic Suite of Tweto (1987), due to petrographic and textural similarities to rocks of that suite and limited Rb-Sr data (for example, Bryant and Hedge, 1978). However, U-Pb zircon date is 1,442±2 Ma (Aleinikoff and others, 1993a), confirming emplacement with Middle Proterozoic Berthoud Plutonic Suite of Tweto (1987)

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
Granitic rocks of 1700-m.y. age group

Age: Proterozoic (1600 - 2500 Ma)

Stratigraphic Name: Boulder Creek Granite; Cross Creek Granite; Denny Creek Granodiorite; Kroenke Granodiorite; Browns Pass Quartz Monzonite; Powderhorn Granite; Pitts Meadow Granodiorite; Bakers Bridge Granite; Tenmile Granite

Description: Includes Boulder Creek -M.Y. AGE GROUP (AGE 1650-1730 M.Y.)--Includes Boulder Creek, Cross Creek, Denny Creek, Kroenke, Browns Pass, Powderhorn, Pitts Meadow, Bakers Bridge, and Tenmile Granites, Quartz Monzonites, or Granodiorites; also, unnamed granitic rocks

Lithology: Major:{granite}, Minor:{granodiorite,quartz monzonite}

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]

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



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References

U.S. Geological Survey Professional Paper 319

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