Cordero Mine, Opalite Mining District, Humboldt County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Cordero Mine | Mine |
| Opalite Mining District | Mining District |
| Humboldt County | County |
| Nevada | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
41° 54' 39'' North , 117° 48' 52'' West
Latitude & Longitude (decimal):
Locality type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| McDermitt | 172 (2011) | 12.5km |
| Orovada | 155 (2011) | 38.0km |
| Paradise Valley | 109 (2011) | 51.9km |
Other/historical names associated with this locality:
McDermitt Group
Structure: Reg.Struct: Mcdermitt Caldera Collapse Structure: Arcuate Faults And Ring Fractures ; Reg.Trends: Northeast Ne-Trending Faults; "M" Fault
Alteration: Silicic, Argillic
Tectonics: Basin And Range
Commodity: Reported "metacinnabar" is actually phototrophically altered corderoite (which is still chemically corderoite). John mccormack, oral communication 30 aug/91.
Deposit: Replacement and fracture filling occurs beneath faults and in opalite discovered in 1924 by tomas alcorta. The name "Cordero" is derived from the basque language meaning "little lamb," after the original discovery of ore by basque sheepherders during the lambing season. Alcorta and his partner E. Agnarez explored for several years by pits. In 1935, the bradley mining co. Leased it and sank shaft into the main ore body. Since 1940, cordero mining co. Has explored and mid the property. It rapidly became nevada's leading producer of mercury. Mine workings in 1944 consisted of 6 open pits and about 3000 ft. Of underground workings. It closed in 1970. Recent exploration (1976) delineated a new ore body at cordero, with reserves of about 400,000 flasks hg. ; info.src : 1 pub lit ore to 600 ft (bailey and phoenix, 1944, p. 98).
Deposit type: Hot-spring Hg
Development: Mine closed underground workings in 1970, but opened the mcdermitt open pit mine nearby.
Geology: Cinnabar occurs As disseminated crystals As veinlets, and As solid masses in altered volcanics. Tuffaceous sedimentary rocks considered to be caldera-fill. ; geol.desc: rhyolite overlies andesite ; major.units: miocene volcanic rocks two or more silicified zones (yates, 1942, p. 348).
Rock formation(s): Welded Tuffs Alkali Rhyolite Of Long Ridge;Welded Tuffs Alkali Rhyolite Of Long Ridge;
Ore(s): Ring Fracture Faults; Smaller Collapse Structure Nested Within The Larger Mcdermitt Caldera
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
9 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:
| β Alunite Formula: KAl3(SO4)2(OH)6 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Cinnabar Formula: HgS Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Hematite Formula: Fe2O3 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Jarosite Formula: KFe3+ 3(SO4)2(OH)6 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Mercury Formula: Hg Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Opal Formula: SiO2 · nH2O Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Pyrite Formula: FeS2 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Quartz Formula: SiO2 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Quartz var. Chalcedony Formula: SiO2 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Stibnite Formula: Sb2S3 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Mercury | 1.AD.05 | Hg |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Cinnabar | 2.CD.15a | HgS |
| β | Pyrite | 2.EB.05a | FeS2 |
| β | Stibnite | 2.DB.05 | Sb2S3 |
| Group 4 - Oxides and Hydroxides | |||
| β | Hematite | 4.CB.05 | Fe2O3 |
| β | Opal | 4.DA.10 | SiO2 Β· nH2O |
| β | Quartz | 4.DA.05 | SiO2 |
| β | var. Chalcedony | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Alunite | 7.BC.10 | KAl3(SO4)2(OH)6 |
| β | Jarosite | 7.BC.10 | KFe3+ 3(SO4)2(OH)6 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Alunite | KAl3(SO4)2(OH)6 |
| H | β Jarosite | KFe3+ 3(SO4)2(OH)6 |
| H | β Opal | SiO2 · nH2O |
| O | Oxygen | |
| O | β Alunite | KAl3(SO4)2(OH)6 |
| O | β Quartz var. Chalcedony | SiO2 |
| O | β Jarosite | KFe3+ 3(SO4)2(OH)6 |
| O | β Opal | SiO2 · nH2O |
| O | β Quartz | SiO2 |
| O | β Hematite | Fe2O3 |
| Al | Aluminium | |
| Al | β Alunite | KAl3(SO4)2(OH)6 |
| Si | Silicon | |
| Si | β Quartz var. Chalcedony | SiO2 |
| Si | β Opal | SiO2 · nH2O |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Alunite | KAl3(SO4)2(OH)6 |
| S | β Jarosite | KFe3+ 3(SO4)2(OH)6 |
| S | β Cinnabar | HgS |
| S | β Pyrite | FeS2 |
| S | β Stibnite | Sb2S3 |
| K | Potassium | |
| K | β Alunite | KAl3(SO4)2(OH)6 |
| K | β Jarosite | KFe3+ 3(SO4)2(OH)6 |
| Fe | Iron | |
| Fe | β Jarosite | KFe3+ 3(SO4)2(OH)6 |
| Fe | β Hematite | Fe2O3 |
| Fe | β Pyrite | FeS2 |
| Sb | Antimony | |
| Sb | β Stibnite | Sb2S3 |
| Hg | Mercury | |
| Hg | β Cinnabar | HgS |
| Hg | β Mercury | Hg |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Willden, R., (1964), Geology and Mineral Deposits of Humboldt Co. Nev.; Nev. Bureau of Mines Bull. 59.
Bailey, E.H., and Phoenix, D.A., (1944), Quick Silver Deposits in Nevada; Univ. Nev. Bull. 38, No. 5; Geol and Min. Ser No. 41, P. 98, Pl. 1.
Rytuba, J.J., (1976), Geology and Ore Deposits of Thmcdermitt Caldera, Nevada-oregon; U.S.G.S. Open File Rept. 76-535
Mckee, E.H., (1976), Origin of the Mcdermitt Caldera in Nevada and Oregon and Related Mercury Deposits: Preprint of a Paper Presented at the 1976 Aime Annual Meeting, Las Vegas, Nevada, 1976.
Foord, E.E. Brendsen, P., Storey, L., (1974), Corderoite, First Natural Occurrence of Dhg3s2cu2 from the Cordero Mercury Deposit, Humboldt Co., Nev; Am.Min., Vol 59, P. 652-655.
Yates, R.G., (1942), Quick Silver Deposits of the Opalite District, Malheur County, Oregon, and Humboldt County, Nevada; U.S.G.S. Bull. 931-n, P. 346, 348.
Roper, M.W., (1976), Hot Springs Mercury Deposition at Mcdermitt Mine, Humboldt Co., Nev; Preprint of Paper Given at Aime Annual Meeting Las Vegas, Nev. 1976.
J.E. Gilbert and V.P. Haas, (1959), Cordero-nevada's Largest Mg. Mine; E. Min. Jour., Vol. 160, No. 3.
USBM Ic (8252),1965,p.224
USBM Ic (6995),1938,p.31
Other Databases
| Link to USGS MRDS: | 10040311 |
|---|
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.
