Golconda-Gold Wedge Group (NBMG Sample Sites 3909; 3912; Golconda Extension; Golden Wedge Fraction and My All Fraction), Wonder District, Churchill Co., Nevada, USAi
Latitude & Longitude (WGS84): | 39° 28' 35'' North , 118° 6' 4'' West |
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Latitude & Longitude (decimal): | 39.47658,-118.10124 |
GeoHash: | G#: 9rh08d3r9 |
USGS MRDS Record: | 10047696 |
Köppen climate type: | BWk : Cold desert climate |
Structure: Fault Zone
Alteration: Bleaching, Kaolinization, Silicification Of Rhyolite Tuff
Deposit: Large silicified vein, partly breccia-very strongly silicified, formed along a fault zone. The zone includes a 6-inch thick lens of limonite-stained brecciated quartz vein. Most of the workings reportedly found very little mineralization below the 100 ft level. Discovery year: early 1900's
Deposit type: Epithermal vein, Comstock
Development: M.s. #3153, not patented, but surveyed in 1907. No activity when examined in 1986, but nearby staking by erickson in july 1979. Size of workings indicate some probable past production
Ore(s): Fault Zone
Regions containing this locality
North America Plate | Tectonic Plate |
Select Mineral List Type
Standard Detailed Strunz Dana Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Rock Types Recorded
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Alphabetical List Tree DiagramDetailed Mineral List:
ⓘ 'Limonite' Formula: (Fe,O,OH,H2O) Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
ⓘ Pyrite Formula: FeS2 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 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Unclassified Minerals, Rocks, etc. | |||
ⓘ | 'Limonite' | - | (Fe,O,OH,H2O) |
List of minerals arranged by Dana 8th Edition classification
Group 2 - SULFIDES | |||
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AmBnXp, with (m+n):p = 1:2 | |||
ⓘ | Pyrite | 2.12.1.1 | FeS2 |
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks | |||
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si | |||
ⓘ | Quartz | 75.1.3.1 | SiO2 |
Unclassified Minerals, Mixtures, etc. | |||
ⓘ | 'Limonite' | - | (Fe,O,OH,H2O) |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Limonite | (Fe,O,OH,H2O) |
O | Oxygen | |
O | ⓘ Limonite | (Fe,O,OH,H2O) |
O | ⓘ Quartz | SiO2 |
Si | Silicon | |
Si | ⓘ Quartz | SiO2 |
S | Sulfur | |
S | ⓘ Pyrite | FeS2 |
Fe | Iron | |
Fe | ⓘ Limonite | (Fe,O,OH,H2O) |
Fe | ⓘ Pyrite | FeS2 |
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] |
Early Miocene - Oligocene 15.97 - 33.9 Ma ID: 2890090 | Intermediate silicic ash flow tuff Age: Cenozoic (15.97 - 33.9 Ma) Stratigraphic Name: Bates Mountain Tuff; Caetano Tuff; Edwards Creek Tuff; New Pass Tuff; Fish Creek Mountains Tuff; Fraction Tuff; Pancake Summit Tuff; Northumberland Tuff; Shingle Pass Tuff; Darrough Felsite Description: Welded and nonwelded silicic ash flow tuffs. Aside from alluvium, this unit covers more of Nevada than any other rock, with over 4,000 polygons representing it on this map. It is principally exposed in the central regions of the State. It locally includes thin units of air fall tuff and sedimentary rocks. It includes rocks mapped on the Washoe South, Lyon, Douglas, and Carson Counties maps as the Hartford Hill Rhyolite Tuff (now abandoned); on the Nye South map as the tuff of White Blotch Spring, the tuffs of Antelope Springs, and the tuff of Monotony Valley; in Lander County it is mapped as the Bates Mountain Tuff, Caetano Tuff, Edwards Creek Tuff, New Pass Tuff, tuff of Hall Creek, and the tuff of McCoy Mine; in Lander and Pershing Counties it is the Fish Creek Mountains Tuff; on both of the Nye County maps it is the Fraction Tuff; it also includes the Pancake Summit Tuff, Northumberland Tuff, Shingle Pass Tuff, some outcrops of Darrough Felsite shown to be Tertiary (other outcrops have been shown to be Mesozoic or Paleozoic), tuffs of Moores station, tuffs of Peavine Canyon, tuffs of the Pancake caldera complex, the Stone Cabin Formation, tuff of Saulsbury Wash, tuff of Kiln Canyon, the Tonopah Formation, tuffs of Hannapah, tuff of Bald Mountain, the Needles Range Formation, and the Calloway Well Formation on the Nye North map; in Esmeralda County it is the Kendall Tuff and latite; and in northern Nye and Lander Counties it is the Toiyabe Quartz Latite (now abandoned), and other unnamed units. It corresponds to unit Tt2 on the 1978 State map. It crops out in every county except Clark. 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:{felsic volcanic}, Minor:{sedimentary} 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