The April Fool Mine is a silver and gold mine located in Lincoln county, Nevada at an elevation of 6,299 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
Elevation: 6,299 Feet (1,920 Meters)
Commodity: Silver, Gold
Lat, Long: 37.4625, -114.76472
Map: View on Google Maps
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April Fool Mine MRDS details
Site Name
Primary: April Fool Mine
Secondary: Goldcup
Secondary: April Fool
Secondary: Swifter Claims
Secondary: NBMG Sample Locations 1751 and 1752.
Commodity
Primary: Silver
Primary: Gold
Tertiary: Copper
Tertiary: Bismuth
Tertiary: Antimony
Location
State: Nevada
County: Lincoln
District: Delamar (Ferguson) District District
Land Status
Land ownership: Private
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
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1892
Discovery Year: 1892
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Form: TABULAR
Structure
Type: R
Description: Abundant Normal Faults
Type: L
Description: Vein Offset By Rhyolite Dike
Alterations
Alteration Type: L
Alteration Text: Silicification
Rocks
Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Early Cambrian
Analytical Data
Analytical Data: ASSAY NEAR NO. 1 PORPHYRY DIKE GAVE: .08 TO .17 OZ AU/TON, ONE .55 OZ AU/TON OBTAINED .4 TO 5.6 OZ AG/TON. FROM GOLDCUP WORKINGS: .08 OZ AU/TON, 11.03 OZ AG/TON, 1.16% BI, .72% SB. HANDPICKED ORE NEAR SURFACE (1932): .82 OZ AU/TON, 2.7 OZ AG/TON (1933): 2.6 OZ AU/TON, 1.52 OZ AG/TON. SAMPLES 1751 AND 1752 CONTAIN, RESPECTIVELY: 100 PPM MN, 50 AND 30 PPM AG, 200 PPM AS, 0 AND 10 PPM AU, 2000 AND 500 PPM BA, 50 AND 200 PPM BI, 700 AND 500 PPM CU, 50 AND 0 PPM MO, 500 AND 150 PPM PB, 100 AND 2000 PPM SB, 200 AND 0 PPM SR, 300 AND 20 PPM ZR. SAMPLES 1751 AND 1752 CONTAIN, RESPECTIVELY: 100 PPM MN, 50 AND 30 PPM AG, 200 PPM AS, 0 AND 10 PPM AU, 2000 AND 500 PPM BA, 50 AND 200 PPM BI, 700 AND 500 PPM CU, 50 AND 0 PPM MO, 500 AND 150 PPM PB, 100 AND 2000 PPM SB, 200 AND 0 PPM SR, 300 AND 20 PPM ZR.
Materials
Ore: Tetrahedrite
Gangue: Quartz
Gangue: Barite
Gangue: Pyrite
Comments
Comment (Location): INFO FROM LAND.ST :1982 1982
Comment (Production): APRIL FOOL MINE PRODUCTION SECOND IN THE DISTRICT.
Comment (Deposit): QUARTZITE FRAGMENTS CEMENTED BY COMB AND DRUSY QUARTZ. PRISMATIC QUARTZ ENCRUSTS VUGS AS DO FINE CRYSTALS OF LATE-STAGE JAROSITE. DARK BANDS IN THE QUARTZ ARE VERY FINE-GRAINED SULFIDES OF WHICH THE ONLY RECOGNIZABLE MINERAL IS PYRITE. FE AND MN OXIDES ARE COMMON. PART OF THE VEIN CONSISTS OF FRACTURED QUARTZITE, AND MALACHITE IS DEPOSITED ALONG FINE FRACTURE SURFACES IN THE QUARTZITE AND ALSO IN THE VEIN MATERIAL. SEVERAL SAMPLES OF QUARTZ VEIN IN OUTCROP AND ON DUMP CONTAIN COARSE CLOTS OF TETRAHEDRITE (MOSTLY OXIDIZED TO CU OXIDES) AND ABUNDANT OXIDIZED AND UNOXIDIZED PYRITE.
Comment (Development): CAPTAIN DELAMAR PURCHASED A PART INTEREST IN THE MINE IN 1893. IN 1897 IT WAS EQUIPPED WITH A 10-STAMP MILL. IN 1932-1933, THE MCGUFFIE AND GENTRY LEASE ON THE APRIL FOOL PRODUCED CONSIDERABLE SHIPPING ORE. THE HORN BROTHERS OF DELAMAR WERE DOING A LITTLE MINING AND DEVELOPMENT WORK AND SHIPPING SOME ORE IN 1931. THE MINE EMPLOYED 35 MEN IN 1899, AT WHICH TIME THERE WAS EXTENSIVE MINE EXPLORATION ONGOING. THE APRIL FOOL WAS AMONG THE MINES CONSOLIDATED UNDER BAMBERGER-DELAMAR MINES CO IN 1902. 1983 EXAMINATION INDICATED BACKHOE TRENCHING OF DUMPS AND SORTING OF MATERIAL NEAR WORKINGS DONE 1-2 YEARS AGO.
Comment (Geology): ORE BODY IS A FISSURE VEIN. MAIN ORE SHOOTS ARE NARROW VEINS LESS THAN 10 FEET WIDE, DIVIDED INTO LENSES BY INTERSECTING GOUGE SEAMS, CONTINUING FOR A LENGTH OF 1500 FEET. THE VEIN CONTAINS MASSES OF BRECCIA WITH CHERTY QUARTZ CEMENT, AND VEINLETS OF CRUSTIFIED AND BANDED "COMB" QUARTZ. THE APRIL FOOL VEIN IS MINERALIZED TO A VARIABLE EXTENT FOR LENGTH OF 3,000 FEET, AT DEPTH OF 700 FEET. IT IS ROUGHLY PARALLEL TO AND 500 TO 700 FEET EAST OF THE DELAMAR VEIN
Comment (Workings): FOUR MAIN ADIT LEVELS. MAP OF ACCESSIBLE WORKINGS IN THE GOLDCUP TUNNEL AVAILABLE IN CALLAGHAN, 1937. IN 1983 THERE WAS ONE N35W-TRENDING ADIT WHICH TURNED TO THE NE 15 FT BEYOND THE PORTAL. STOPES AND SHAFTS CONTINUE SEVERAL HUNDRED FT UP AND DOWN SLOPE FROM THIS ADIT, ALONG VEIN STRUCTURE. MANY DRILL ROADS IN AREA 5-10 YRS OLD. REMAINS OF TRACK AND OLD STONE CABIN AT ADIT LEVEL. TRENCHING. IN 1983 THERE WAS ONE N35W-TRENDING ADIT WHICH TURNED TO THE NE 15 FT BEYOND THE PORTAL. STOPES AND SHAFTS CONTINUE SEVERAL HUNDRED FT UP AND DOWN SLOPE FROM THIS ADIT, ALONG VEIN STRUCTURE. MANY DRILL ROADS IN AREA 5-10 YRS OLD. REMAINS OF TRACK AND OLD STONE CABIN AT ADIT LEVEL. TRENCHING.
Comment (Deposit): VEIN IS PARALLEL TO DELAMAR VEIN. VEIN IS OFFSET BY A LATE RHYOLITE DIKE. ORE IS SILICIFIED QUARTZITE BRECCIA AND VEINLETS OF COMB QUARTZ. THIS CONSPICUOUS SILICIFIED RIB OUTCROPS BOLDLY ALONG RIDGECREST ADJACENT TO WORKINGS. RAISE ABOVE ADIT EXPLORES THE VEIN AND EXPOSES A 2-3 FT WIDE ZONE WHICH IS IRON STAINED AND SHOWS SUBPARALLEL SETS OF QUARTZ VEINS WHICH CUT A HIGHLY SILICEOUS QUARTZITE BRECCIA. ON CLOSE EXAMINATION, THE VEIN OUTCROP CONSISTS OF AN IRON-STAINED QUARTZITE BRECCIA CEMENTED WITH JASPERY SILICA OR MORE MASSIVE VITREOUS COCKADE OR COMB QUARTZ. SOME WIDER, MASSIVE, LATE-STAGE QUARTZ VEINS CROSSCUT BRECCIA PARALLEL TO VEIN OUTCROP. UPPER WORKINGS ARE A FAIRLY CONTINUOUS LINE OF SHAFTS AND STOPES OFTEN INCLINED TO THE WEST ALONG DIP OF THE VEIN. THE VEIN OUTCROPS BOLDLY ADJACENT TO AND WEST OF WORKINGS AND CONTINUES UPSLOPE FOR SEVERAL HUNDRED FEET. THE SAMPLED STOPE TRENDS N10-20E AND DIPS 75 NW ALONG VEIN. AT S END OF STOPE, THE VEIN OUTCROP CONSISTS OF PINK ANGULAR
References
Reference (Deposit): CALLAGHAN, E., 1937, GEOLOGY OF THE DELMAR DISTRICT, LINCOLN CO., NEV. NEV BUR MINES V. 31. NO. 5 P. 58-60
Reference (Deposit): TSCHANZ, C.M., AND PAMPEYAN, E.H., 1970, GEOLOGY AND MINERAL DEPOSITS OF LINCOLN CO., NEV. NEV. BUR MINES BULL 73 P. 141
Reference (Deposit): SMITH, A.M. AND CARPENTER, J., 1931, INSPECTION TRIP NOTES: NBMG DISTRICT FILE 167, ITEM 3.
Reference (Deposit): NBMG DISTRICT FILE 167, PRESS CLIPPINGS, 1899, 1908.
Reference (Deposit): EMMONS, S.F., 1901, AIME TRANS, VOL XXXI, P. 658-682
Reference (Deposit): BENTZ, J., AND SMITH, P., 1983, FIELD EXAMINATION REPORT, SEPT 30, 1983.
Reference (Production): CALLAGHAN, 1937
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.
