Old Man Spring Prospect

The Old Man Spring Prospect is a uranium mine located in Humboldt county, Nevada at an elevation of 6,224 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Old Man Spring Prospect
Secondary: Chevron Oil Prospect?

Commodity

Primary: Uranium

Location

State: Nevada
County: Humboldt
District: Disaster District; Kings River; Thacker Pass Area

Land Status

Land ownership: BLM Administrative Area
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Model Name: Volcanogenic U

Orebody

Not available

Structure

Type: R
Description: Mcdermitt Caldera, A Miocene Volcanic Collapse Feature About 40km Across

Type: L
Description: This Occurrence Is Near The Edge Of The Intracaldera Moat Where They Lap Up Against The W. Wall Of The Caldera

Alterations

Alteration Type: L
Alteration Text: Argillized, Limonite-Stained; Silicification

Rocks

Name: Mudstone
Role: Host
Age Type: Host Rock
Age Young: Miocene

Analytical Data

Analytical Data: U3O8 UP TO 0.13% WITH HIGH K (TO 10.9%) AND TH (0.5'%), AND ANOMALOUS AS, BA, F, HG, MO, SB, Y, ZR. LIMEY BEDS TO THE NORTH OF THE TRENCHES HAVE UP TO 41 PPM U3O8 AND HIGH AG. RADIOACTIVITY IS 2-3 X BG IN A AREA AS LARGE AS 20 YD SQUARE, AS A RESULT OF CAT WORK
Analytical Data: 3 SEPARATE ANOMALIES WERE NOTED ALONG THE N-S ROAD HERE. BEST RADIOACTIVITY IS NOT IN SOLID ROCK, BUT ONE BOULDER FROM THE PROSPECT ASSAYED 200 PPM U3O8 AND 207 PPM TH.

Materials

Gangue: Iron
Gangue: Clay
Gangue: Quartz
Gangue: Opal
Unknown: Barite

Comments

Comment (Deposit): THE HIGHEST RADIOACTIVITY IS ASSOCIATED WITH REDDISH-BROWN CLAY, POSSIBLY FAULT GOUGE. THIS OCCURRENCE IS AT THE EDGE OF THE SEDIMENTARY BASIN AND IN THE AREA OF THE CALDERA RING FRACTURE. AT THE EDGE OF THE SEDIMENTS, A SYSTEMATIC INCREASE IN PERMEABILITY CAN BE PREDICTED, WHICH WOULD FACILITATE THE MIGRATION OF SOLUTIONS INTO THE SEDIMENT HOSTS.

Comment (Workings): BULL-DOZED TRENCHES

Comment (Location): ALONG THE WESTERN EDGE OF BULL BASIN ABOUT 1 MILE ENE OF OLD MAN SPRING . INFO FROM LAND.ST :(1972)

References

Reference (Deposit): GREENE, R.C., 1976, USGS OFR 76-753.

Reference (Deposit): MITCHELL, T.P., 1980, FIELD EXAMINATION OF URANIUM OCCURRENCE

Reference (Deposit): WILLDEN, R., 1964, NBMG BULL 59, PL. I.

Nevada Gold

Nevada has a total of 368 distinct gold districts. Of the of those, just 36 are major producers with production and/or reserves of over 1,000,000 ounces, 49 have production and/or reserves of over 100,000 ounces, with the rest having less than 100,000 ounces. Read more: Gold Districts of Nevada.