Little Keystone Shaft (Dinero), Leadville District, Lake Co., Colorado, USA
| Latitude & Longitude (WGS84): | 39° 14' 52'' North , 106° 24' 8'' West |
|---|---|
| Latitude & Longitude (decimal): | 39.24778,-106.40222 |
| Köppen climate type: | Dfc : Subarctic climate |
Commodities (Major) - Gold; (Trace) - Zinc, Lead
Development Status: Plant
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
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 ID: 2817073 | Granitic rocks of 1400-m.y. age group Age: Mesoproterozoic (1000 - 1600 Ma) Stratigraphic Name: Silver Plume Granite; Sherman Granite; Cripple Creek Granite; St. Kevin Granite; Vernal Mesa Granite; Curecanti Granite; Eolus Granite; Trimble Granite Description: Includes Silver Plume, Sherman, Cripple Creek, St. Kevin, Vernal Mesa, Curecanti, Eolus, and Trimble Granites or Quartz Monzonites; also, San Isabel Granite of Boyer (1962) and unnamed granitic rocks Lithology: Major:{alkali feldspar granite,granite}, Minor:{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] |
| Mesoproterozoic 1000 - 1600 Ma ID: 3303333 | St. Kevin Granite Age: Mesoproterozoic (1000 - 1600 Ma) Description: Fine-grained to medium-grained, gray to light pinkish gray, equigranular to porphyritic, massive to locally weakly foliated biotite-muscovite monzogranite or quartz monzonite. Displays a wide variety of textures, including a fine-grained facies, a “normal facies” (medium-grained, equigranular to porphyritic 2-mica monzogranite), a granodiorite facies, and a tracytoid hybrid facies containing close-packed aligned microcline crystals (Tweto, 1974a). Forms a batholith about 40 km long and 20 km wide with intricate boundaries, of which only the eastern part is within the map area. U-Pb zircon age is 1,425±12 Ma (Moscati and others, 2017) Reference: Kellogg, K.S., R.R. Shroba, C.A. Ruleman, R.G. Bohannon, W.C. McIntosh, W.R. Premo, M.A. Cosca, R.J. Moscati, T.R. Brandt. Geologic map of the upper Arkansas River valley region, north-central Colorado. doi: 10.3133/sim3382. U.S. Geological Survey Scientific Investigations Map 3382. [186] |
| Paleoproterozoic 1600 - 2500 Ma ID: 3192520 | 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
