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Midas Mine, South Pass-Atlantic City Mining District, Fremont Co., Wyoming, USAi
Regional Level Types
Midas MineMine
South Pass-Atlantic City Mining DistrictMining District
Fremont Co.County
WyomingState
USACountry

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Key
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Latitude & Longitude (WGS84):
42° 30' 42'' North , 108° 43' 32'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Lander7,686 (2017)35.7km
Boulder Flats408 (2011)45.0km
Hudson456 (2017)45.3km



Deposit:: LOCATED ONE MILE NORTH OF ATLANTIC CITY
Deposit:: GOLD AND ARSENPYRITE ALONG FRACTURES IN QUARTZ

Commodities (Major) - Gold
Development Status: Past Producer
Structure: Fractures

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


2 valid minerals.

Detailed Mineral List:

Gold
Formula: Au
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

OOxygen
O QuartzSiO2
SiSilicon
Si QuartzSiO2
AuGold
Au GoldAu

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

Archean
2500 - 4000 Ma



ID: 3189133
Archean crystalline metamorphic rocks

Age: Archean (2500 - 4000 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]

Archean
2500 - 4000 Ma



ID: 3218418
Mafic amphibolite, Miners Delight Formation

Age: Archean (2500 - 4000 Ma)

Stratigraphic Name: Miners Delight Formation

Description: Black hornblendic amphibolite with fine- and medium-grained texture; includes metamorphosed gabbro dikes and sills and basalt flows; locally hosts auriferous shear zones

Reference: Johnson, J.F. and W.M. Sutherland. Geologic Map Of The Lander 30' X 60' Quadrangle, Fremont County, Wyoming. Wyoming State Geological Survey Map Series 87. [157]

Archean
2500 - 4000 Ma



ID: 2773513
Metasedimentary rocks

Age: Archean (2500 - 4000 Ma)

Description: Wind River Range--Metagraywacke, pelitic schist, metaconglomerate, graphitic schist, and iron-formation; local meta-andesite. At least 2,800 Ma. Seminoe Mountains (southeast end of Granite Mountains)--Pelitic schist, quartzite, and iron-formation. Casper Mountain (northwest extension of Laramie Mountains)--Felsic gneiss, quartzite, and iron-formation. Laramie Mountains--Pelitic schist, iron-formation, quartzite, marble, metaconglomerate, and metagraywacke.

Comments: Original map source: Green, Gregory N., and Drouillard, Patricia H., 1994, The Digital Geologic Map of Wyoming in ARC/INFO Format: U.S. Geological Survey Open-File Report 94-0425, scale 1:500,000.

Lithology: Major:{metasedimentary}, Minor:{banded iron formation}

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Deposit:: GSW RI 23, P. 12.
Production:: GSW BULL 50, P. 86: GSW RI 23, P. 12.
Deposit:: GSW BULL 50, P. 86.
Deposit:: WYO GEOL SURV BULL 50 1966 P7, 86

USGS MRDS Record:10080766
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