The Hapgood Silver Mine and Yellow Dog Prospects is a gold and silver mine located in Humboldt county, Nevada at an elevation of 4,400 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: 4,400 Feet (1,341 Meters)
Commodity: Gold, Silver
Lat, Long: 41.55694, -118.57083
Map: View on Google Maps
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.
Hapgood Silver Mine and Yellow Dog Prospects MRDS details
Site Name
Primary: Hapgood Silver Mine and Yellow Dog Prospects
Secondary: NBMG Sample Site 2952
Commodity
Primary: Gold
Primary: Silver
Secondary: Copper
Secondary: Lead
Secondary: Zinc
Tertiary: Antimony
Tertiary: Arsenic
Location
State: Nevada
County: Humboldt
District: Varyville District; Florence 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
Not available
Ownership
Owner Name: Jack Doyle, Robinson And Associates
Home Office: Aurora, Co
Years: 1973 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Basin And Mountains
Mineral Deposit Model
Model Name: Low-sulfide Au-quartz vein
Orebody
Form: TABULAR
Structure
Type: R
Description: Tight Se-Plunging Anticline
Alterations
Alteration Type: L
Alteration Text: Kaolinization, Mn-Staining
Rocks
Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Permian
Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Associated Rock
Age Young: Late Permian
Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Host Rock
Age Young: Late Permian
Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Permian
Analytical Data
Analytical Data: GOLD, LESS THAN .003 TO .846 OZ/TON
Analytical Data: SILVER, .03 TO 20.42 OZ/TONSAMPLE 2952 OF QUARTZ VEIN IN ADIT AND DUMP CONTAINS7 % FE, 0.2 % MG, 0.07 % CA, 0.15 % TI, 500 PPM MN, 5000 PPM A-G, +10000 PPM AS, 7.5 PPM AU (AA ANALYSIS), 50 PPM B, 200 PPM -BA, 200 PPM CD, 5 PPM CO, 50 PPM CR, 3000 PPM CU, 20 PPM MO, 7- PPM NI, +20000 PPM PB, 5000 PPM SB, 10 PPM SC, 50 PPM SN, 100- PPM V, 2000 PPM ZN.
Materials
Ore: Chalcopyrite
Gangue: Hematite
Gangue: Limonite
Comments
Comment (Workings): RECENT DOZER WORK IN THE VICINITY OF A LARGE OLDER ADIT THAT WAS THE MAIN WORKINGS. DRILLING AND ROAD-BUILDING DON-E WITHIN THE LAST 4 YEARS (1984)
Comment (Location): ACCESSIBLE BY GOOD IMPROVED ROAD. UTM IS FOR SAMPLE SITE 2952 AT HAPGOOD MINE. YELLOW DOG PROSPECTS ARE SCATTERED -NORTH AND WEST OF THIS SITE.
Comment (Geology): QUARTZ-CALCITE VEINS FROM ONE TO A FEW FEET THICK. TWO DISTINCT VEIN SYSTEMS PRESENT. ONE TRENDS N50-60W, EMPLACED ALONG SHEAR ZONES PARALLEL TO MAIN AXIS OF REGIONAL FOLDING. THE OTHER IS AT RIGHT ANGLES TO THE FIRST, TRENDING N15-20E, PARALLEL TO BEDDING IN THE VOLCANIC ROCKS. AREA MINED WAS ALONG AN INTERSECTION OF THE TWO VEIN SYSTEMS. GOLD VALUES WERE OBTAINED FROM BOTH VEIN SYSTEMS, BUT SILVER APPEARS TO BE RESTRICTED TO THE NORTHEAST-TRENDING VEINS. GRADE OF ORE DECREASES WITH DEPTH.
Comment (Development): RECENTLY DRILLED AND RESTAKED BY ROBINSON AND ASSOCIATES OF AURORA, COLORADO (1984)
Comment (Deposit): THE OLD SW-BEARING ADIT WAS DRIVEN ON A SHEAR WITHIN THE META-ANDESITE WHICH IS PARTLY FILLED WITH OXIDIZED AND BR-ECCIATED QUARTZ VEIN MATERIAL. THE MINERALIZATION EXTENDS INTO- THE METASEDIMENTS ALONG THE MARGIN OF THE VEIN, AND INCLUDES -COPPER SULFIDES AND OXIDES AS WELL AS POSSIBLE AG-PB SULFIDES.- DRILL CORE HAS BEEN STORED IN A TRAILER ON THE SITE AND IS PR-ESUMED TO HAVE COME FROM THE LOCAL DRILL SITES.; MODEL NAME COULD ALSO BE: KUROKO MASSIVE SULFIDE.
References
Reference (Deposit): TINGLEY, J. V., 1973, UNPUBLISHED REPORT ON FILE AT N.B.M.G.
Reference (Deposit): WILLDEN, R., 1964, NBMG BULL 59.
Reference (Deposit): QUADE, JACK, 1984, NBMG FIELD EXAMINATION, 9-27-84, AND SAMPLE ANALYSIS
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.
