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Cahill Mine, Poverty Peak District, Humboldt Co., Nevada, USAi
Regional Level Types
Cahill MineMine
Poverty Peak DistrictMining District
Humboldt Co.County
NevadaState
USACountry

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Latitude & Longitude (WGS84): 41° 20' 50'' North , 117° 27' 24'' West
Latitude & Longitude (decimal): 41.34722,-117.45685
GeoHash:G#: 9rk7ppn91
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Paradise Valley109 (2011)17.5km
Orovada155 (2011)36.9km
Golconda214 (2011)43.9km
Winnemucca7,887 (2017)47.7km


An Hg occurrence/mine located in sec. 15(?), T40N, R40E, .

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Calomel
Formula: (Hg2)2+Cl2
Cinnabar
Formula: HgS
Eglestonite
Formula: (Hg2+2)3OCl3(OH)
Gypsum
Formula: CaSO4 · 2H2O
Mercury
Formula: Hg
Montroydite
Formula: HgO
Quartz
Formula: SiO2
Stibnite
Formula: Sb2S3
Terlinguaite
Formula: (Hg2+2)Hg2+2Cl2O2

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Mercury1.AD.05Hg
Group 2 - Sulphides and Sulfosalts
Cinnabar2.CD.15aHgS
Stibnite2.DB.05Sb2S3
Group 3 - Halides
Calomel3.AA.30(Hg2)2+Cl2
Eglestonite3.DD.05(Hg2+2)3OCl3(OH)
Terlinguaite3.DD.20(Hg2+2)Hg2+2Cl2O2
Group 4 - Oxides and Hydroxides
Montroydite4.AC.15HgO
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Mercury1.1.7.1Hg
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
Group 4 - SIMPLE OXIDES
AX
Montroydite4.2.6.1HgO
Group 9 - NORMAL HALIDES
AX
Calomel9.1.8.1(Hg2)2+Cl2
Group 10 - OXYHALIDES AND HYDROXYHALIDES
A2(O,OH)Xq
Terlinguaite10.4.2.1(Hg2+2)Hg2+2Cl2O2
Am(O,OH)pXq
Eglestonite10.5.4.1(Hg2+2)3OCl3(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
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

HHydrogen
H Eglestonite(Hg22+)3OCl3(OH)
H GypsumCaSO4 · 2H2O
CCarbon
C CalciteCaCO3
OOxygen
O Eglestonite(Hg22+)3OCl3(OH)
O Terlinguaite(Hg22+)Hg22+Cl2O2
O GypsumCaSO4 · 2H2O
O CalciteCaCO3
O QuartzSiO2
O MontroyditeHgO
SiSilicon
Si QuartzSiO2
SSulfur
S CinnabarHgS
S StibniteSb2S3
S GypsumCaSO4 · 2H2O
ClChlorine
Cl Calomel(Hg2)2+Cl2
Cl Eglestonite(Hg22+)3OCl3(OH)
Cl Terlinguaite(Hg22+)Hg22+Cl2O2
CaCalcium
Ca GypsumCaSO4 · 2H2O
Ca CalciteCaCO3
SbAntimony
Sb StibniteSb2S3
HgMercury
Hg CinnabarHgS
Hg MercuryHg
Hg Calomel(Hg2)2+Cl2
Hg Eglestonite(Hg22+)3OCl3(OH)
Hg Terlinguaite(Hg22+)Hg22+Cl2O2
Hg MontroyditeHgO

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

Permian - Late Devonian
251.902 - 382.7 Ma



ID: 2897710
Golconda Terrane - Basinal, volcanogenic, terrigenous clastic, and minor carbonate rocks

Age: Phanerozoic (251.902 - 382.7 Ma)

Stratigraphic Name: Banner Formation; Nelson Formation; Black Dyke Formation; Mina Formation; Havallah Formation; Pumpernickel Formation; Inskip Formation; Mitchell Creek Formation; Pablo Formation; Schoonover Formation

Description: The Golconda terrane is composed of deformed and imbricated thrust slices of upper Paleozoic rocks including deep-marine, pelagic and turbiditic, carbonate, terrigenous clastic and volcaniclastic rocks, radiolarian chert and argillite, and pillow basalt (Silberling, Jones, and others, 1992). While the terrane is characterized by a great diversity of rock types, all rocks are strongly deformed with an east-vergent fabric, a distinguishing characteristic of this terrane (Brueckner and Snyder, 1985; Jones, 1991a; Miller, Kanter, and others, 1982; Murchey, 1990; Stewart, Murchey, and others, 1986). It crops out in a long sinuous belt, up to 100 mi wide in places. Southwest of Mina, the belt trends east from the California border to just north of Tonopah, and then bends north-south to the west of Longitude 117° to about 50 mi north of Winnemucca, where it bends again, sharply to the east-north of Tuscarora with significant exposures eastward and to the northern border of the State. Outcrops of the Golconda terrane are present in Mineral, Esmeralda, northern Nye, Churchill, Elko, Humboldt, Lander, and Pershing Counties. It includes some rocks originally mapped as Banner and Nelson Formations in Elko County; rocks originally mapped as the Excelsior Formation in Mineral and Esmeralda Counties, later assigned to the Black Dyke and Mina Formations by Speed (1977b); the original Havallah and Pumpernickel Formations (Muller, Ferguson, and Roberts, 1951; Roberts, 1964; Silberling and Roberts, 1962), later revised to structural sequences (Murchey, 1990; Stewart, MacMillan, and others, 1977; Stewart, Murchey, and others, 1986; Theodore, 1991; 1994) in Elko, Humboldt, Lander, and Pershing Counties; the Inskip Formation in Pershing County; the Mitchell Creek Formation in Elko County; the Pablo Formation in northern Nye County; and the Schoonover Formation (see unit GChr) in Elko County. In all of the places where rocks of the Golconda terrane were originally believed to form a stratigraphic sequence, detailed mapping and biostratigraphic analysis with radiolarians and conodonts has demonstrated that it is characterized by complex imbrications of rocks ranging from mid-Permian through latest Devonian age (Holdsworth, 1986; Jones, 1991b; Miller, Holdsworth, and others, 1984; Murchey, 1990; Stewart, MacMillan, and others, 1977). In Pershing County, the Golconda terrane is unconformably overlain by Triassic volcanic rocks of the Koipato Group (TRkv) which form the stratigraphic base to the Humboldt assemblage (TRc, JTRs). In Mineral and Esmeralda Counties, it is unconformably overlain by the Gold Range assemblage (JTRgor) of mainly nonmarine, terrigenous clastic, and volcanogenic Upper Triassic and younger rocks. Elsewhere in northern and southwestern Nevada, it is structurally overlain by Mesozoic accreted terranes. Across the length of its exposure from the Independence Mountains north of Elko to the Candelaria region south of Mina, the base of the Golconda terrane has a remarkably consistent structural emplacement relationship with adjacent rocks. It commonly lies on a low-angle structure above Permian and Pennsylvanian rocks of the Siliciclastic overlap assemblage. In places where these rocks are missing, it is faulted directly onto either the nearby lower Paleozoic Basin assemblage, the Nolan belt rocks, or the Harmony Formation of the Dutch Flat terrane. The type locality of this regional feature, the Golconda thrust is well exposed along Interstate Highway 80 at Edna Mountain near the town of Golconda (Ferguson, Roberts, and Muller, 1952), and in the open pits of mines near Battle Mountain (Theodore, T., oral commun., 2006). In southwestern Nevada, the lower Lower Triassic rocks of the Candelaria Formation overlie Permian and Pennsylvanian Siliciclastic overlap assemblage rocks, and the Golconda terrane is exposed nearby, but not observable directly on top of the Candelaria because of younger cover rocks. Elsewhere, there is no youngest age constraint for the age of emplacement. In several places, notably in the Osgood Mountains and the Toiyabe Range, it is also bounded by large, steeply dipping, mélange-like shear zones against older rocks of the Nolan belt. Stratigraphic and structural studies within the terrane have locally identified lithostratigraphic groupings (Erickson and Marsh, 1974a, b; Jones, 1991a; Murchey, 1990), but only the Home Ranch subterrane can presently be distinguished on a regional scale (GChr). Interpretations of the size and character of the late Paleozoic basin where these rocks formed and the nature of its Late Permian or Early Triassic accretion are as varied as the lithologic and structural characteristics of the terrane itself (see references above).

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:{siliciclastic,volcanic}, Minor:{carbonate,argillite,chert,basalt}

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]

Permian - Devonian
251.902 - 419.2 Ma



ID: 3186322
Paleozoic sedimentary and volcanic rocks

Age: Phanerozoic (251.902 - 419.2 Ma)

Lithology: Carbonate-sandstone-chert

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]

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)
Castor, S.B. and Ferdock, G.C. (2004), Minerals of Nevada, Nevada Bureau of Mines and Geology, Special Publication 31.


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