Cahill Mine, Poverty Peak Mining District, Humboldt County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Cahill Mine | Mine |
| Poverty Peak Mining District | Mining District |
| Humboldt County | County |
| Nevada | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 20' 50'' North , 117° 27' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Paradise Valley | 109 (2011) | 17.5km |
| Orovada | 155 (2011) | 36.9km |
| Golconda | 214 (2011) | 43.9km |
| Winnemucca | 7,887 (2017) | 47.7km |
An Hg occurrence/mine located in sec. 15(?), T40N, R40E.
Structure: Reg. Struct: Thrust Fault, Folding; Reg. Trends: NNE Fault, parallel to sedimentary bedding. The fault is locally multiple and in places dies out only to reappear a few feet above or below with small displacement. The plan of the fault is accurate.
Alteration: Silicification
Tectonics: Basin and Range
Deposit: 1967, Earl P. Ripley leased the property and produced ore. Advanced Mining Industries, Inc. leased the property in 1969-1971 producing 369 flasks from ore processed in a rotary furnace on the Conchita property. Recent work has produced a limited amount of cinnabar, marketed as cinnabar crystals, as recently as 1980s; Information source: 1-public literature; 2-unpublished reports; 3-field observation. Ore depth occurs in rolls beneath gouge on a minor fault. Locally, minor stibnite accompanies ore. Discovered about 1936, by J.H. Cahill who staked 6 claims. Owned by Mrs. Cahill in 1957; under lease to Belco Corporation at that time. This has been the largest producer in the district. In 1937, development consisted of 3 adits totaling 300 feet in length. A 10-ton rotary furnace was installed in 1939, yielding 490 flasks Hg in 1940. Lessees in 1941 recovered 55 flasks Hg. Lessee Cordero Mining Co. did some development work in 1943. Some ore was mined by lessees in 1944. In 1944, development consisted of about 2000 ft of workings, mainly on 2 levels 50 ft. Apart, a fairly continuous ore body was stoped for about 200 ft; width about 40 ft. In 1954, I. Walters leased the mine and produced a small amount of mercury from a 12-ton rotary furnace. Northern Resources Corp. leased the property in 1955 and processed ore in the rotary furnace as well as a Gould furnace on the Hapgood Mine. Belco Petroleum Co. acquired the property from Northern Resources and continued mining ore from 1960 to.
Deposit type: Hot-spring Hg
Development: 6 claims
Geology: Geol.com: ore occurs as nearly pure cinnabar veinlets filling openings along and closely beneath the fault; richest ore occurred as pods resulting from replacement of highly fractured silicified dolomite extending several feet into the footwall. Ore bodies localized where fault "rolls" in strike toward footwall, forming an inverted which guided rising solutions.
Rock formation(s): Havallah Formation; Pumpernickel Formation
Ore(s): Gouge zone with seams and disseminations
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
10 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 DiagramDetailed Mineral List:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Calomel Formula: [Hg2]2+Cl2 |
| ✪ Cinnabar Formula: HgS |
| ⓘ Eglestonite Formula: [Hg2]2+3OCl3(OH) |
| ⓘ Gypsum Formula: CaSO4 · 2H2O |
| ⓘ Montroydite Formula: HgO |
| ⓘ Native Mercury Formula: Hg |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Stibnite Formula: Sb2S3 |
| ⓘ Terlinguaite Formula: [Hg3]4+Hg2+Cl2O2 |
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Mercury | 1.AD.05 | Hg |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| ⓘ | Stibnite | 2.DB.05 | Sb2S3 |
| Group 3 - Halides | |||
| ⓘ | Calomel | 3.AA.30 | [Hg2]2+Cl2 |
| ⓘ | Eglestonite | 3.DD.05 | [Hg2]2+3OCl3(OH) |
| ⓘ | Terlinguaite | 3.DD.20 | [Hg3]4+Hg2+Cl2O2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Montroydite | 4.AC.15 | HgO |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Gypsum | 7.CD.40 | CaSO4 · 2H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Eglestonite | [Hg2]32+OCl3(OH) |
| H | ⓘ Gypsum | CaSO4 · 2H2O |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Eglestonite | [Hg2]32+OCl3(OH) |
| O | ⓘ Gypsum | CaSO4 · 2H2O |
| O | ⓘ Montroydite | HgO |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Terlinguaite | [Hg3]4+Hg2+Cl2O2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| S | ⓘ Gypsum | CaSO4 · 2H2O |
| S | ⓘ Stibnite | Sb2S3 |
| Cl | Chlorine | |
| Cl | ⓘ Calomel | [Hg2]2+Cl2 |
| Cl | ⓘ Eglestonite | [Hg2]32+OCl3(OH) |
| Cl | ⓘ Terlinguaite | [Hg3]4+Hg2+Cl2O2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Gypsum | CaSO4 · 2H2O |
| Sb | Antimony | |
| Sb | ⓘ Stibnite | Sb2S3 |
| Hg | Mercury | |
| Hg | ⓘ Calomel | [Hg2]2+Cl2 |
| Hg | ⓘ Cinnabar | HgS |
| Hg | ⓘ Eglestonite | [Hg2]32+OCl3(OH) |
| Hg | ⓘ Native Mercury | Hg |
| Hg | ⓘ Montroydite | HgO |
| Hg | ⓘ Terlinguaite | [Hg3]4+Hg2+Cl2O2 |
Other Databases
| Link to USGS MRDS: | 10040304 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Auld Lang Syne BasinBasin
- Basin and Range BasinsBasin
- Golconda-Roberts Mountain DomainDomain
- Northern Basin and RangeWide Rift
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Cahill Mine, Poverty Peak Mining District, Humboldt County, Nevada, USA