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Defense mine, Vicksburg Mining District, Humboldt County, Nevada, USAi
Regional Level Types
Defense mineMine
Vicksburg Mining DistrictMining District
Humboldt CountyCounty
NevadaState
USACountry

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Latitude & Longitude (WGS84):
41° 51' 52'' North , 118° 41' 15'' West
Latitude & Longitude (decimal):
41.86457,-118.68755
GeoHash:
G#: 9r7w5jnqg
GRN:
N28W65
Type:
Mine
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Mindat Locality ID:
59666
Long-form identifier:
mindat:1:2:59666:1
GUID (UUID V4):
0
Other/historical names associated with this locality:
Cold Spring Mine; Cold Springs; NBMG Sample Site 2973


10 miles south of Denio on west side of Pine Forest Range.
Structure: Faults Striking NE, Dipping Steeply NW

Alteration: Contact

Deposit: Two kinds of ore bodies have been mined: tactite bodies along the granite-metamorphic rock contact; and quartz veins along faults. Main orebody was in tactite and consisted of quartz, epidote, actinolite, and scheelite. Skarn replaced a thin bed of marble, remnants of which were left on the hanging wall. Orebody was 25 feet long at surface, increasing to 85 feet on adit level. 100 feet below surface, orebody was 75 feet long, cut off by a fault at NE end. Scheelite was also mined from a quartz vein 5 feet wide, about 1200 feet south of the adit, but its grade was only a fe W tenths of a percent wo3. Two small ore shoots were mined, reported to have yielded about 1400 tons ore that averaged about 1.0 % wo3. This record has been merged with m242861, which has been deleted.

Deposit type: W skarn

Development: Property was leased from 1942 to 1944 to c.a. Wagner and j.p. Jones who mined about 3000 tons of ore which was milled at the old ashdown mill about 4 miles south. Mine was again active from 1953 to 1956 and from 1969 to 1971 yielding an additional 1200 units wo3. There was no activity at time of field examination (1984), but mine was still in fair condition.

Geology: Metamorphic rocks are in contact with the west edge of a granitic stock 8 miles long and 2.5 miles wide. Aplite and diorite dikes were intruded along the stock-sedminentary contact. Skarn zone and quartz veins occupy some faults and occurs with tactite along the contact. The metamorphic rock is primarily mica schist containing a few layers of marble and hornfels.

Ore(s): Igneous Contact; South Hill Fault

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


5 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘMolybdenite2.EA.30MoS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘScheelite7.GA.05Ca(WO4)
Group 9 - Silicates
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Unclassified
ⓘ'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ QuartzSiO2
Oⓘ ScheeliteCa(WO4)
Oⓘ Garnet GroupX3Z2(SiO4)3
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
AlAluminium
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ QuartzSiO2
Siⓘ Garnet GroupX3Z2(SiO4)3
SSulfur
Sⓘ MolybdeniteMoS2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ ScheeliteCa(WO4)
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
MoMolybdenum
Moⓘ MolybdeniteMoS2
WTungsten
Wⓘ ScheeliteCa(WO4)

Other Databases

Link to USGS MRDS:10014338

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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.

References

Willden, R., (1964), Geology and Mineral Deposits of Humboldt County, Nevada, NBMG Bull 59.
Quade, Jack, (1984), NBMG Field Examination Report and Sample Analysis: NBMG Unpublished (tingley) File.
Stager, H. K. and Tingy, J. V., (1988), Tungsten Deposits in Nevada: NBMG Bull. 105, P. 96.
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