Dutch Flat Mine Area

The Dutch Flat Mine Area is a mercury mine located in Humboldt county, Nevada at an elevation of 5,000 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: Dutch Flat Mine Area
Secondary: Paradise

Commodity

Primary: Mercury
Tertiary: Gold
Tertiary: Silver

Location

State: Nevada
County: Humboldt
District: Dutch Flat 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: Surface/Underground

Ownership

Owner Name: Dutch Flat Mines, Inc. ; Brican Resources Ltd. (50 %); Bow Mining Ltd. (50 %).
Years: 1940 -

Owner Name: Dutch Flat Mining Co. ; Bow Valley
Years: 1940 -

Production

Year: 1942
Time Period: To 1942
Material type: HG
Description: Cp_Grade: ^Ore Avg. 20 Lb Hg/Ton.

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Year First Production: 1940
Discovery Year: 1898
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Model Name: Hot-spring Hg

Orebody

Form: TABULAR, DISCONTINUOUS

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Yes, Altered Sediments; Argillic

Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cambrian

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cambrian

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Analytical Data

Analytical Data: 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.

Materials

Ore: Cinnabar
Ore: Pyrite
Gangue: Quartz
Gangue: Jarosite

Comments

Comment (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.

Comment (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.

Comment (Workings): UNDERGROUND WORKINGS AS WELL AS SHALLOW DOZERCUTS

Comment (Geology): 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.

Comment (Location): N 1/2 OF NE 1/4 OF SEC 17; ON W. SIDE HOT SPRINGS RANGE.

Comment (Production): 70 FLASKS TO END OF 1942, AS WELL AS AN UNKNOWN AMOUNT SINCE THEN.

Comment (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

Comment (Deposit): Discovery Year: NOT LONG AFTER 1898

References

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

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

Reference (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.

Reference (Production): BAILEY, E.H. AND PHOENIX, D.A., 1944

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.