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Eastern Star Mine (ASARCO Star claims), Gold Circle District (Midas District), Elko Co., Nevada, USA

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Latitude & Longitude (WGS84): 41° 15' 37'' North , 116° 43' 23'' West
Latitude & Longitude (decimal): 41.26046,-116.72316
GeoHash:G#: 9rkfxzhz9
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


Deposit: Fissure veins in zone of silicified devitrified rhyolite. Zone is cut by 3 of 4 parallel veinlets carrying quartz, argentite & free gold. Located near frazier creek, the only developement is a 100 ft. Tunnel driven northward along strike of a silicified Fe-stained zone of rhyolite ; info.src : 1 pub lit

Deposit type: Epithermal vein, Comstock

Geology: The mine is in an area of white devitrified rhyolite whidh is similar to that east in gold circle district proper. A zone of silicified rhyolite is cut by three or four parallel veinlets up to 10in wide which carry ribbons of quartz, argentite, and free gold.

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


9 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:

Acanthite
Formula: Ag2S
Reference: Engineering and Mining Journal (1913) July 26 no.5 p237; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Baryte
Formula: BaSO4
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
Calcite
Formula: CaCO3
Reference: Economic Geology (2004) Vol. 99, pp. 1665–1686
'commodity:Copper'
Formula: Cu
Reference:  
'Electrum'
Formula: (Au, Ag)
Reference: Economic Geology (2004) Vol. 99, pp. 1665–1686
Fischesserite
Formula: Ag3AuSe2
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Gold
Formula: Au
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; Engineering and Mining Journal (1913) July 26 no.5 p237; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'commodity:Gold'
Formula: Au
Reference:  
'K Feldspar'
Reference: Economic Geology (2004) Vol. 99, pp. 1665–1686
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Economic Geology (2004) Vol. 99, pp. 1665–1686
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
Naumannite
Formula: Ag2Se
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Pyrite
Formula: FeS2
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.
Quartz
Formula: SiO2
Reference: Econ Geol (2004) 99:1665-1686; Economic Geology (2004) Vol. 99, pp. 1665–1686; Engineering and Mining Journal (1913) July 26 no.5 p237
'Rhyolite'
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Silver
Formula: Ag
Reference: Engineering and Mining Journal (1913) July 26 no.5 p237
'commodity:Silver'
Formula: Ag
Reference:  

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Electrum'1.AA.05(Au, Ag)
'Gold'1.AA.05Au
'Silver'1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
'Acanthite'2.BA.35Ag2S
'Fischesserite'2.BA.75Ag3AuSe2
'Naumannite'2.BA.55Ag2Se
'Pyrite'2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Baryte'7.AD.35BaSO4
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
'Rhyolite'-

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
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
Fischesserite2.4.3.2Ag3AuSe2
Naumannite2.4.1.2Ag2Se
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Electrum'-(Au, Ag)
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
'Rhyolite'-

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
CCarbon
C CalciteCaCO3
OOxygen
O K Feldspar (var: Adularia)KAlSi3O8
O BaryteBaSO4
O CalciteCaCO3
O Limonite(Fe,O,OH,H2O)
O QuartzSiO2
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
SiSilicon
Si K Feldspar (var: Adularia)KAlSi3O8
Si QuartzSiO2
SSulfur
S AcanthiteAg2S
S BaryteBaSO4
S PyriteFeS2
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca CalciteCaCO3
FeIron
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
SeSelenium
Se FischesseriteAg3AuSe2
Se NaumanniteAg2Se
AgSilver
Ag AcanthiteAg2S
Ag Electrum(Au, Ag)
Ag FischesseriteAg3AuSe2
Ag NaumanniteAg2Se
Ag SilverAg
BaBarium
Ba BaryteBaSO4
AuGold
Au Electrum(Au, Ag)
Au FischesseriteAg3AuSe2
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

Neogene
2.588 - 23.03 Ma



ID: 3186305
Cenozoic volcanic rocks

Age: Neogene (2.588 - 23.03 Ma)

Stratigraphic Name: Columbia River Basalt

Comments: Columbia Plateau

Lithology: Flood basalt(s); mafic volcanic rocks; basalt

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]

Miocene
5.333 - 23.03 Ma



ID: 3022683
Younger rhyolitic flows and shallow intrusive rocks

Age: Miocene (5.333 - 23.03 Ma)

Stratigraphic Name: Cañon Rhyolite; Jarbidge Rhyolite

Description: Rhyolitic flows, domes, plugs, breccias, quartz latite, rhyodacite, quartz porphyry dikes, and other shallow intrusive rocks. This unit includes rocks mapped as the Cañon Rhyolite on the Washoe North map, the Jarbidge Rhyolite and phenorhyolitic and phenodacitic flows and domes on the Elko County map, and other unnamed units. It has a distribution similar to Tt3, with exposures in the northern and southern parts of the State, but only crops out in a few places in the central region. It corresponds to unit Tr3 on the 1978 State map, and also includes a few rocks mapped as Trt on the 1978 State map. This unit is exposed in every county except White Pine.

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:{rhyolite,hypabyssal quartz latite,dacite}

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


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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