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⇱ Rex Mine, Gold Circle Mining District (Midas Mining District), Elko County, Nevada, USA

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Rex Mine, Gold Circle Mining District (Midas Mining District), Elko County, Nevada, USAi
Regional Level Types
Rex MineMine
Gold Circle Mining District (Midas Mining District)Mining District
Elko CountyCounty
NevadaState
USACountry

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Latitude & Longitude (WGS84):
41° 14' 50'' North , 116° 47' 8'' West
Latitude & Longitude (decimal):
Type:
Mindat Locality ID:
41419
Long-form identifier:
mindat:1:2:41419:0
GUID (UUID V4):
0


Structure: Fault Along Rhyolite-Andesite Contact

Alteration: Silicification

Deposit: Vein, fault zone bearing auriferous pyrite & argentite developement consists of two shafts, numberous drifts, adits, and small open pits. Sirdevan in his 1913 report has both a mine map and a property map. ; info.src : 1 pub lit

Deposit type: Epithermal vein, Comstock

Geology: The ore lode is a vein along the fault contact betw/ rhyolite and overlying andesite. The vein is a zone of crushed silicified Fe-stained rhyolite from 5 to 15 ft. Wide. The footwall is the fault slickenslide. A cross vein in the rhyolite has been developed for a short distance. Most of the ore is oxidized, but sulphides (gold assoc. W/pyrite) are present at the bottom of the mine.

Ore(s): Fault Zone

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


6 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Entries shown in red are rocks recorded for this region.

Detailed Mineral List:

ⓘ Acanthite
Formula: Ag2S
ⓘ Cinnabar
Formula: HgS
ⓘ Marcasite
Formula: FeS2
ⓘ Native Gold
Formula: Au
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘAcanthite2.BA.35Ag2S
ⓘCinnabar2.CD.15aHgS
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2

List of minerals for each chemical element

OOxygen
Oⓘ QuartzSiO2
SiSilicon
Siⓘ QuartzSiO2
SSulfur
Sⓘ AcanthiteAg2S
Sⓘ CinnabarHgS
Sⓘ MarcasiteFeS2
Sⓘ PyriteFeS2
FeIron
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
AgSilver
Agⓘ AcanthiteAg2S
AuGold
Auⓘ Native GoldAu
HgMercury
Hgⓘ CinnabarHgS

Other Databases

Link to USGS MRDS:10045548

Other Regions, Features and Areas containing this locality


This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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