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Ace High - Jackpot Prospect, Turret District, Chaffee Co., Colorado, USA

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Latitude & Longitude (WGS84): 38° 37' 57'' North , 106° 0' 15'' West
Latitude & Longitude (decimal): 38.63250,-106.00417
Köppen climate type:Dfc : Subarctic climate

Commodities (Major) - Iron, Copper
Development Status: Occurrence
Host Rock Unit: Silver Plume Quartz Monzonite
Structure: Southern Mosquito Range, Arkansas Valley Graben, N-Trending Faults, Pleasant Valley Syncline
Host Rock: Hornblendite, Gneiss, Skarn (Tactite)
Tectonic Structure: Central Cordillera (Southern Rocky Mountains)

Commodity List

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

Mineral List

21 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

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

1600 - 2500 Ma

ID: 3301005
Aluminous gneiss and schist, calc-silicate gneiss, and quartzite

Age: Proterozoic (1600 - 2500 Ma)

Description: Wide variety of rocks in the southern Maysville quadrangle (Shannon and McCalpin, 2006) and a large area within 15 km north of Salida, east of the Arkansas River. Includes biotite gneiss, muscovite schist, biotite-muscovite schist, calc-silicate gneiss, quartzite, muscovite-sillimanite gneiss, and muscovite-cordierite schist (larger bodies of the latter unit mapped separately as Xmc). Rocks of unit Xms are interlayered with minor, unmapped, thin beds of metavolcanic rocks and locally intruded by small, unmapped bodies of gabbro and granitic rocks. Biotite gneiss is similar to that described separately north of the Gunnison-Salida volcano-plutonic belt and is commonly migmatitic. Muscovite schist is light tannish white to medium gray, fine to medium grained, moderately to strongly foliated and contains quartz, feldspar, and abundant muscovite. Muscovite-sillimanite schist is almost white to light-orange-brown, fine- to medium-grained and characterized by small “eyes” of sillimanite-quartz-muscovite as long as 2 cm. Calc-silicate gneiss is exposed in narrow zones generally associated with amphibolitic rocks and consists of greenish-gray to black, light-orange to reddish weathering, fine- to coarse-grained assemblages of clinopyroxene (diopside-hedenbergite), amphibole (tremolite-actinolite), biotite, garnet, chlorite, carbonate, epidote, and sphene. Rock generally non-foliated, except for mica-rich varieties. Some calc-silicate rocks have associated with zinc, copper and lead mineralization. Quartzite (qz) is a very distinctive rock type mapped in the southern Maysville quadrangle (Shannon and McCalpin, 2006) consisting of light- to dark-gray, very fine- to fine-grained quartz-magnetite-hematite rock. Quartzite beds are as thick as 8 m and hundreds of meters long. They are mostly massive, but locally have remnant bedding laminations. Quartzite interpreted as metachert (Shannon and McCalpin, 2006) and is commonly interlayered with amphibolite gneiss. East of the Arkansas River, most rocks mapped as metasedimentary rocks of the Gunnison-Salida volcano-plutonic belt are migmatitic biotite gneiss (Boardman, 1976; Van Alstine and Cox, 1969; Wallace and others, 1997; Wallace and Lawson, 1998). Van Alstine (1974) also reports some interbedded marble and calc-silicate gneiss (scarn)

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]

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]

1600 - 2500 Ma

ID: 2855570
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]

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

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