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Lone Pine Feldspar Quarry (Claim: Lone Pine; MS 20867), Devils Head Pegmatite District, Douglas Co., Colorado, USA

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Latitude & Longitude (WGS84): 39° 9' 25'' North , 105° 3' 26'' West
Latitude & Longitude (decimal): 39.1569444444, -105.057222222


Ref.: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 25 (Table A-1).

A mine located in the NW¼ NE¼ sec. 25, T.10., R.69W.

Mineralization is is an irregular pegmatite mass in granite.

Workings are a large open cut.
REF:Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 24-25.
Deposit:: BRYANT, BRUCE, AND OTHERS, 1981, GEOLOGIC MAP OF THE DENVER 1X2 QUADRANGLE, NORTH-CENTRAL COLORADO:
Commodities (Major) - Feldspar; (Trace) - Thorium, Niobium (Columbium), REE
Development Status: Past Producer
Host Rock Unit: Pegmatite
Structure: Perry Park-Jarre Canyon Fault, Manitou Park Half Graben, Front Range Uplift, Pikes Peak Batholith, Rampart Range Uplift
Host Rock: Granite
Tectonic Structure: Central Cordillera (Southern Rocky Mtns)

Mineral List


4 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Major Regional Geological Units

This 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 geology at this locality but it gives a background for the region in which it is found.

Mesoproterozoic
1000 - 1600 Ma
Mesoproterozoic plutonic: granite

Plutonic: granite

Mesoproterozoic
1000 - 1600 Ma
Rocks of Pikes Peak Batholith (1000-m.y. age group)

Major:{granite,alkali feldspar granite}, Minor:{quartz monzonite}

Includes Pikes Peak, Mount Rosa, Windy Point, and Redskin Granites and unnamed rocks

Mesoproterozoic
1000 - 1600 Ma
Mesoproterozoic plutonic rocks

Plutonic rocks

Deep-seated to high-level intrusions are included. Many charnockites, anorthosites, and large ophiolites, classified as plutons, are distinguished in the database using the SIGNIF item. Ophiolites were classified as plutons, even where remnants may be extrusive and/or sedimentary.


References for regional geology:

Data provided by Macrostrat.org

Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .

Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.

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.



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