The Four Jacks Claims is a gold and uranium mine located in Pershing county, Nevada at an elevation of 4,902 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.
Elevation: 4,902 Feet (1,494 Meters)
Commodity: Gold, Uranium
Lat, Long: 40.13944, -119.27722
Map: View on Google Maps
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.
Four Jacks Claims MRDS details
Primary: Four Jacks Claims
Secondary: NBMG Sample Sites 2908, 2909, 2910
Secondary: Penny, Dart
District: Nightingale District
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.
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Deposit Size: S
Mineral Deposit Model
Description: Central Part Of Eugeosynclinal Portion Of Basin And Range Of Nevada
Alteration Type: L
Alteration Text: Metasediments Are Altered And Bleached In Part; Deuteric Alteration Of Dikes & Sills
Age Type: Associated Rock
Age Young: Late Cretaceous
Age Type: Host Rock
Age Young: Late Jurassic
Age Type: Host Rock Unit
Age Young: Late Jurassic
Analytical Data: 1500 CPS OVER 2 X 100 X 10 FT (19 X BG)
Analytical Data: RADIOACTIVITY: 500-10000 CPS OVER 1X1X1 FT
Analytical Data: NURE SAMPLES 066 OF IRON-STAINED HORNFELS WITH GYPSUM CONTAINS 1420 PPM CU308. SAMPLE 067 OF IRON-STAINED HORNFELS WITH YELLOW U MINERAL CONTAINS 386 PPM CU308. SAMPLE 068 OF HIGHGRADE U308 ORE (BLEACHED HORNFELS) CONTAINS 2220 PPM CU308. SAMPLE 069 OF QUARTZ FELDSTAR PEGMATITE CONTAINS 24 PPM CU308
Comment (Deposit): QUARTZ VEINS IN GRANODIORITE HAVE BEEN PROSPECTED FOR GOLD. SEVERAL OF THE VEINS IN PROSPECTS WERE SAMPLED IN SAMPLES 2908 AND 2910. SAMPLE 2909 WAS FROM A SMALL CROSS-CUTTING ADIT IN GRAYISH-BLACK SHALES WITH DISTINCT YELLOW COATING (U OXIDES?) ALONG BEDDING FRACTURES. THE CONTACT BETWEEN PEGMATITE AND HORNFELS IS THE MOST IMPORTANT AREA OF URANIUM CONCENTRATION.
Comment (Workings): NUMEROUS PROSPECT PITS, TRENCHES, DOZER CUTS, DRILL PADS
Comment (Development): EARLY WORK WAS FOR GOLD; LATER EXPLORED FOR URANIUM. LAST STAKING WAS IN 1971. LOCALLY, THE SEDIMENTS HAVE BEEN CUT BY NUMEROUS BENCHES THAT WERE USED AS DRILL PADS. ALL OF THIS WORK DATES FROM THE PERIOD OF URANIUM EXPLORATION, ALTHOUGH BOTH PERIODS OF WORK AND STAKING ARE IN CLEAR EVIDENCE. 12 CLAIMS.
Comment (Location): BENCH CUT IN SADDLE ON RIDGE ; INFO FROM LAND.ST :(1972)
Reference (Deposit): SMOUSE, DE FORREST, 1978, FIELD EXAMINATION OF URANIUM OCCURENCE
Reference (Deposit): QUADE, JACK, 01 JUN 85, NBMG FIELD EXAMINATION AND SAMPLE ANALYSIS.
Reference (Deposit): GARSIDE, L.J., 1973, NBMG BULL 81, P. 95
Reference (Deposit): AEC PRELIM. RECONN. REPORT #3729, OPEN FILE.
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 at Gold Districts of Nevada.