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Darkey Mine (Darky Mine; Black Rock Mine), Decoy District, Elko Co., Nevada, USAi
Regional Level Types
Darkey Mine (Darky Mine; Black Rock Mine)Mine
Decoy DistrictMining District
Elko Co.County
NevadaState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84): 40° 40' 42'' North , 114° 20' 18'' West
Latitude & Longitude (decimal): 40.67841,-114.33853
GeoHash:G#: 9rnxqjm0z
USGS MRDS Record:10046022
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
West Wendover4,294 (2017)23.3km
Wendover1,400 (2011)26.2km


Deposit: Vein-replacements along fault. 25 x 8 x 60 ft deep; 0 x 7 x 60 ft. Deep the darkey mine shipped manganese ore during 1917 and 1918. The manganese ore bodies occur As vein-replacements along a n-striking fault. The ore shoot mined was 25 ft long, 8 ft wide, by 60 ft deep. The ore shipped was about 45% manganese, and less than 5% cilica. A second ore shoot was 20 ft long, 7 ft wide, and 60 ft deep. The black rock (probably some mine, NE W name) shipped a small tonnage of manganese ore in 1952. ; info.src : 1 pub lit

Deposit type: Replacement Mn

Development: Mine shipped manganese ore 1917-1918 - 45% mn, 5% silica small tonnage shipped in 1952

Ore(s): N-Striking Fault

Regions containing this locality

North America PlateTectonic Plate

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


3 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

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; USGS Open-File Report 76-56; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; USGS Open-File Report 76-56; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Psilomelane'
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; USGS Open-File Report 76-56; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Pyrolusite
Formula: Mn4+O2
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; USGS Open-File Report 76-56; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; USGS Open-File Report 76-56; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz var: Jasper
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
'Wad'
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; 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 4 - Oxides and Hydroxides
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
var: Jasper4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Psilomelane'-
'Wad'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Limonite'-(Fe,O,OH,H2O)
'Psilomelane'-
Quartz
var: Jasper
-SiO2
'Wad'-

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
CCarbon
C CalciteCaCO3
OOxygen
O PyrolusiteMn4+O2
O Limonite(Fe,O,OH,H2O)
O QuartzSiO2
O CalciteCaCO3
SiSilicon
Si QuartzSiO2
CaCalcium
Ca CalciteCaCO3
MnManganese
Mn PyrolusiteMn4+O2
FeIron
Fe Limonite(Fe,O,OH,H2O)

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

Quaternary - Miocene
0 - 23.03 Ma



ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

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]

Middle Ordovician - Furongian
458.4 - 497 Ma



ID: 2991573
Carbonate Shelf Sequence - Limestone, dolomite, and quartzite

Age: Paleozoic (458.4 - 497 Ma)

Stratigraphic Name: Pogonip Group; Ely Springs Dolomite; Eureka Quartzite

Description: Carbonate platform rocks are present in Nye, Lincoln, Elko, Eureka, Lander, White Pine, Esmeralda, and Clark Counties. This unit is primarily Ordovician in age but does include Upper Cambrian rocks at the base (Page, Lundstrom, and others, 2005). The Pogonip Group, including the Antelope Valley Limestone is the most common name used. In Clark County it also includes the Ely Springs Dolomite, and includes the Eureka Quartzite in White Pine and Clark Counties. Unit OCc corresponds to depositional sequence 2 of Cook and Corboy (2004). Where Ocq is mapped separately, it overlies OCc. Otherwise OCc is depositional under SOc, or in southern Nye and Clark Counties, it is overlain directly by DSc where SOc is not differentiated. Unit OCc depositionally overlies unit Cc.

Comments: Original map source: Crafford, A.E.J., 2007, Geologic Map of Nevada: U.S. Geological Survey Data Series 249, 1 CD-ROM, 46 p., 1 plate; Scale 1:250,000.

Lithology: Major:{limestone,dolostone,quartzite}

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

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Smith, Roscoe M., Mineral Resources of Elko County, Nevada, USGS Open File Report, (1975)-56


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