Hapgood Mine

The Hapgood Mine is a mercury mine located in Humboldt county, Nevada at an elevation of 5,249 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: Hapgood Mine
Secondary: Grayson Group
Secondary: New Alma Group
Secondary: York Mine

Commodity

Primary: Mercury

Location

State: Nevada
County: Humboldt
District: Poverty Peak District

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

Type: Underground

Ownership

Owner Name: Leland York
Years: 1977 -

Owner Name: Crofoot Lumber And Mining Co.
Years: 1970 -

Production

Year: 1941
Time Period: 1939-1941
Material type: HG
Description: Cp_Grade: ^15 Lb/Ton

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1937
Discovery Year: 1936
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Model Name: Hot-spring Hg

Orebody

Form: TABULAR

Structure

Type: R
Description: Reg.Struct: Thrust Fault

Type: L
Description: Bedding Plane Shears

Alterations

Alteration Type: L
Alteration Text: Clay

Rocks

Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Late Permian

Analytical Data

Analytical Data: SAMPLE 2451 OF QUARTZ VEINLETS IN A MIXTURE OF QUARTZITE AND HORNFELS WITH SOME FE OXIDES AND CINNABAR, CONTAINS 0-.5 % FE, 2 % MG, 3 % CA, 0.1 % TI, 200 PPM MN, 0.5 PPM AG, 70 -PPM B, 70 PPM BA, 50 PPM CR, 20 PPM CU, 30 PPM LA, 10 PPM NI, -15 PPM V, 15 PPM Y, 200 PPM ZR, AND +5 LB/T HG(BY AA ANALYSIS)-

Materials

Ore: Cinnabar
Gangue: Calcite
Gangue: Quartz
Gangue: Clay
Gangue: Gypsum

Comments

Comment (Geology): GEOL.COM: CINNABAR OCCURS ALONG SEVERAL CLOSELY-SPACED PARALLEL BEDDING PLANE SHEARS AS VEINLETS AND LOCALLY FORMS ISOLATED BUNCHES IN THE LIMESTONE AWAY FROM THE SHEARS.

Comment (Deposit): DISCOVERED ABOUT 1936 OR 1937 BY T.C. HAPGOOD. THE GROUP OF 6 UNPATENTED CLAIMS. IN 1937, T.C. HAPGOOD FORMED A PARTNERSHIP WITH F.T. JOHNSON AND O.L. CASH, AND ERECTED A 2-PIPE RETORT FROM WHICH 66 FLASKS HG WERE RECOVERED IN 1939-40. LESSEES PRODUCED 38 FLASKS IN 1941. DEVELOPMENT CONSISTS OF ABOUT 500 FT OF UNDERGROUND WORKINGS. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Comment (Development): IN 1939-1940, DISCOVERER T. C. HAPGOOD RECOVERED 66 FLASKS FROM A 2-PIPE INCLINED RETORT. IN 1941 E. T. FISCHER AN-D T. L. CHAPMAN LEASED THE PROPERTY AND PRODUCED 38 FLASKS. EA-RLY IN 1942, THE LESSEES TURNED THE PROPERTY BACK. IN THE PERI-OD 1960-62, 21 FLASKS WERE PRODUCED BY W. BRUNKE AND F. DARRAH-. THE PROPERTY WAS SUBSEQUENTLY LEASED BY LELAND YORK IN 1965,- WHO PRODUCED 2 FLASKS HG IN 1965. IN 1970, THE CROFOOT LUMBER- CO. LEASED THE PROPERTY AND MINED 400 TONS ORE.

Comment (Workings): PRINCIPAL WORKING IS A HAULAGE LEVEL TOTALLING ABOUT 500 FT IN LENGTH WITH ITS 2 BRANCHES. A MINERALIZED FAULT CUT- ABOUT 120 FT FROM THE PORTAL HAS BEEN FOLLOWED BELOW THE HAUL-AGE LEVEL TO A DEPTH OF 34 FT AND ABOVE THIS LEVEL TO THE SURF-ACE, A DISTANCE OF 75 FT. AN ADIT 30 FT BELOW THE HAULAGE LEVE-L INTERSECTS THE ORE ZONE. A SHELF ON THE SOUTH END OF THE PRO-PERTY IS CAVED AND SEVERAL TRENCHES ARE PRESENT ON THE NORTH E-ND OF THE PROPERTY; OPEN CUT, TIN CABIN, RETORTS.

Comment (Deposit): BEDDING-PLANE SHEARS

Comment (Production): 2 - PIPE INCLINED RETORT (1939)

Comment (Location): UNSURVEYED TOWNSHIP

Comment (Reserve-Resource): NO KNOWN RESERVES

References

Reference (Deposit): WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF HUMBOLDT CO., NEV.; NEV. BUR MINES BULL. 59.

Reference (Deposit): BAILEY, E.H. AND PHOENIX, D.A., 1944, QUICKSILVER DEPOSITS IN NEVADA: NEV. U. BULL. 38 NO.5; GEOL MIN. SER. NO 41

Reference (Deposit): JONES, R. B., 29 APR 85, NBMG FIELD EXAMINATION AND SAMPLE ANALYSIS

Reference (Deposit): BAILEY, E. H., RYTUBA, J. J., AND JONES, R. B., 1984, UNPUBLISHED DATA ON MERCURY DEPOSITS OF NEVADA.

Reference (Deposit): GALLAGHER, M. J., 1969, NEVADA MINES, MILLS, AND SMELTERS IN OPERATION AS OF JULY 1, 1969.

Reference (Deposit): MURPHY, MATT, 1943, NEVADA MINES, MILLS, AND SMELTERS.

Reference (Production): BAILEY, RYTUBA, AND JONES (1984)

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.