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Dutch Flat Mine Area

Prospect in Humboldt county in Nevada, United States with commodities Mercury, Gold, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10040540
MRDS ID M055357
Record type Site
Current site name Dutch Flat Mine Area
Alternate or previous names Paradise

Geographic coordinates

Geographic coordinates: -117.49679, 41.17489 (WGS84)
Elevation 1524
Relative position 20 MILES NE OF WINNEMUCCA

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Delvada Spring(quadrangle 1:24,000 scale)

Osgood Mountains(quadrangle 1:100,000 scale)

McDermitt(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Little Humboldt(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management NV)

Bureau of Land Management NV BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Nevada Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 038N 040E 17 Nevada

Comments on the location information

  • N 1/2 OF NE 1/4 OF SEC 17; ON W. SIDE HOT SPRINGS RANGE.

Commodities

Commodity Importance
Mercury Primary
Gold Tertiary
Silver Tertiary

Materials information

Materials Type of material
Cinnabar Ore
Pyrite Ore
Jarosite Gangue
Quartz Gangue

Alteration

  • (Local) Yes, Altered Sediments; Argillic

Analytical data

Result ORE AVG. 20 LB HG/TON. BRICAN'S 1985 ASSAYS RANGED FROM 0.003-0.23 OZ/ST AU AND 0.02-1.6 OZ/ST AU FROM ALTERED ROCKS. ASSAYS FROM QUARTZ VEIN RANGED FROM 0.004-0.65 OZ/ST AU AND 0.03-31.6 OZ/ST AG.

Mineral occurrence model information

Model code 177
USGS model code 27a
Deposit model name Hot-spring Hg

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Harmony Formation
    Rock description Harmony Formation

Economic information

Ore body information

  • General form TABULAR, DISCONTINUOUS
    Strike N45E
    Dip 20-35E
    Length 274.32M
    Width 1.52M

Controls for ore emplacement

  • Shear Zone, Averaging 5 Ft. Wide, 900 Ft Long.

Comments on the geologic information

  • GEOL.COM: CINNABAR IS CHIEFLY DISTRIBUTED IN FRACTURED, SHEARED, ALTERED HORNFELS, ON SHEAR SURFACES, AND AS DISSEMINATIONS AND DISCONTINUOUS VEINLETS. ORE SHOOTS ARE SMALL AND DISCONTINUOUS.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1898
Year of first production 1940

Mining district

District name Dutch Flat District

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Operator
    Owner Dutch Flat Mining Co. ; Bow Valley
    First year 1940
  • Type Owner
    Owner Dutch Flat Mines, Inc. ; Brican Resources Ltd. (50 %); Bow Mining Ltd. (50 %).
    First year 1940

Production statistics

  • Year 1942
    Period To 1942
    Material HG
    Accuracy Accurate
    Description Cp_Grade: ^Ore Avg. 20 Lb Hg/Ton.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Mercury Mercury 9035g/mt

Comments on the production information

  • 70 FLASKS TO END OF 1942, AS WELL AS AN UNKNOWN AMOUNT SINCE THEN.

Workings at the site

  • Type of workings Surface/Underground
    Length 213.36M

Comments on the workings information

  • UNDERGROUND WORKINGS AS WELL AS SHALLOW DOZERCUTS

Comments on development

  • THE MINE WAS BEING REOPENED IN 1969. THE CURRENT (1985) PROPERTY INCLUDES CLAIMS UPSTREAM FROM DUTCH FLAT. IN 1984, MINERALIZATION WAS DISCOVERED BY PRELIMINARY MAPPING AND ROCK SAMPLING BY BRICAN. IN 1985, BOW VALLEY ENTERED INTO A JOINT VENTURE WITH BRICAN AND AGREED TO PROVIDE FINDING FOR A 30-HOLE DRILL PROGRAM. DETAILED GEOCHEMICAL, GEOLOGICAL, AND GEOPHYSICAL SURVEYS COMPLETED BY BRICAN DELINEATED TWO ZONES IN THE CENTRAL CLAIM BLOCK IN WHICH OUTCROPS CONTAIN CONSISTENT GOLD AND SILVER VALUES. A 30-HOLE DRILLING PROGRAM WAS SCHEDULED TO BEGIN IN SEPT 1985.

Reference information

Bibliographic references

  • Deposit

    WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF HUMBOLDT COUNTY, NEVADA: NBMG, BULL. 59.

  • Deposit

    HOTZ, P.E., AND WILLDEW, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF THE OSGOOD MOUNTAINS QUADRANGLE HUMBOLDT COUNTY, NEVADA: USGS PROFESSIONAL PAPER 431.

  • Deposit

    BAILEY, E.H., AND PHOENIX, D.A., 1944, QUICKSILVER DEPOSITS IN NEVADA; UNR BULL.; VOL 38, NO. 5; GEOLOGY AND MINING SERIES NO. 41STEPHENSON, E.L., 1969, REPORT ON GEOLOGIC FIELD EXAMINATIONS OF THE NEVADA GARVEY RANCH LANDS, HUMBOLDT AND ELKO COUNTIES, NEVADA: UNPUBUBLISHED REPORT ON FILE AT NBMG. #5. MINESEARCH ANNUAL, 1984-1985, VOL. VII, P. 139-141, METALS ECONOMICS GROUP, BOULDER, CO. #6. GEORGE CROSS NEWSLETTER, 6 JUN 85, P. 2; 11 SEP 85. #7. THE MINING RECORD 18 SEP 85. #8. NORTH AMERICAN GOLD MINING INDUSTRY NEWS, 5 JUL 85, P. 14.

  • Production

    BAILEY, E.H. AND PHOENIX, D.A., 1944

General comments

Subject category Comment text
Deposit EARLY HISTORY OF THE MINE IS UNKNOWN, EXCEPT THAT IT WAS DISCOVERED AND DEVELOPED AFTER THE DUTCH FLAT PLACER WAS DISCOVERED IN 1893. DUTCH FLAT MINING CO. WAS ORGANIZED BY E.R. ROGERS, E. HAZLETT, AND J.W. TUFT IN 1940, WHEN ORE WAS DEVELOPED AND MINED FROM UNDERGROUND WORKINGS. DEVELOPED ALSO BY SHALLOW OPEN-BULL DOZER CUTS. UNDERGROUND WORKINGS TOTAL ABOUT 700 FT. THE MINE WAS BEING REOPENED IN JUNE, 1969 ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV
Deposit MAIN MINERALIZATION AT NORTH END OF SHEAR ZONE; MINOR WORKINGS AT SOUTH END. THE MINERALIZATION APPEARS TO BE STRUCTURALLY CONTROLLED BY INTERESTING FAULT OR FRACTURE ZONES. THE LARGER EASTERN MINERALIZED ZONE IS 3600 FT LONG AND UP TO 800 FT WIDE. THE WESTERN ZONE IS 2200 FT LONG AND UP TO 400 FT WIDE.
Deposit Discovery Year: NOT LONG AFTER 1898

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1979 Bergquist, Joel R. Nevada Bureau of Mines and Geology
Updater 01-MAY-1987 La Pointe, D.D. Nevada Bureau of Mines and Geology
Updater 01-SEP-1994 Li, Zhiping (Peters, S.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative Nevada resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.