Cahill Mine

Site Name

Primary: Cahill Mine
Secondary: Cherry Blossom
Secondary: NBMG Sample Site 2450

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Commodity

Primary: Mercury
Tertiary: Antimony

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Location

State: Nevada
County: Humboldt
District: Poverty Peak District

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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.

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Holdings

Not available

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Workings

Type: Underground

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Ownership

Owner Name: Cahill, T. M.
Years: 1984 -

Owner Name: Cordero Mining Co.
Years: 1944 -

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Production

Year: 1957
Time Period: To 1957
Material type: HG
Description: Cp_Grade: ^3-20 Lb/Ton

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Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1940
Discovery Year: 1936
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

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Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Basin And Mountains

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Mineral Deposit Model

Model Name: Hot-spring Hg

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Orebody

Form: PODS, LENSES ALONG FAULT 2 ONE

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Structure

Type: R
Description: Reg.Struct: Thrust Fault, Folding ; Reg.Trends: Nne

Type: L
Description: Fault, Parallel To Sedimentary Bedding. The Fault Is Locally Multiple And In Places Dies Out Only To Reappear A Few Feet Above Or Below With Small Displ-Acement. The Plan Of The Fault Is Arcuate

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Alterations

Alteration Type: L
Alteration Text: Silicification

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Rocks

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

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Analytical Data

Analytical Data: YIELD WAS 23 LB HG PER FT. OF WORKINGS. 3 TO 20 LB ORE. SAMPLE 2450 COLLECTED FROM ORE DUMP AT TOP OF ORE BIN WHICH FED FURNACE CONTAINS 0.5 % FE, 2 % MG, 5 % CA, 0.07 %- TI, 300 PPM MN, 70 PPM B, 150 PPM BA, 20 PPM CR, 7 PPM CU, 30- PPM LA, 5 PPM NI, 200 PPM SB 10 PPM V, 100 PPM ZR.

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Materials

Ore: Cinnabar
Ore: Stibnite
Gangue: Quartz
Gangue: Calcite

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Comments

Comment (Location): APPROX. N 1/2 SEC 15 (?) (UNSURVEYED AREA). 9 CLAIMS AND FRACTIONS

Comment (Development): 6 CLAIMS

Comment (Deposit): ORE DEP. OCCURS IN ROLLS BENEATH GOUGE ON A MINOR FAULT.. LOCALLY, MINOR STIBNITE ACCOMPANIES ORE.

Comment (Deposit): DISCOVERED ABOUT 1936, BY J.H. CAHILL WHO STAKED 6 CLAIMS. OWNED BY MRS. CAHILL IN 1957; UNDER LEASE TO BELCO CORP AT THAT TIME. THIS HAS BEEN THE LARGEST PRODUCER IN THE DISTRICT. IN 1937, DEVELOPMENT CONSISTED OF 3 ADITS TOTALLING 300 FEET IN LENGTH. A 10-TON ROTARY FURNACE WAS INSTALLED IN 1939, YIELDING 490 FLASKS HG IN 1940. LESSEES IN 1941 RECOVERED 55 FLASKS HG. LESSEE CORDERO MINING CO. DID SOME DEVELOPMENT WORK IN 1943 SOME ORE WAS MINED BY LESSEES IN 1944. IN 1944, DEVELOPMENT CONSISTED OF ABOUT 2000 FT OF WORKINGS, MAINLY ON 2 LEVELS 50 FT. APART. A FAIRLY CONTINUOUS ORE BODY WAS STOPED FOR ABOUT 200 FT; WIDTH ABOUT 40 FT. IN 1954, I. WALTERS LEASED THE MINE AND PRODUCED A SMALL AMOUNT OF MERCURY FROM A 12-TON ROTARY FURNACE. NORTHERN- RESOURCES CORP LEASED THE PROPERTY IN 1955 AND PROCESSED ORE -IN THE ROTARY FURNACE AS WELL AS A GOULD FURNACE ON THE HAPGOO-D MINE. BELCO PETROLEUM CO ACQUIRED THE PROPERTY FROM NORTHERN- RESOURCES AND CONTINUED MINING ORE. FROM 1960 TO

Comment (Deposit): 1967, EARL P-. RIPLEY LEASED THE PROPERTY AND PRODUCED ORE. ADVANCED MINING- INDUSTRIES, INC. LEASED THE PROPERTY IN 1969-1971 PRODUCING 3-69 FLASKS FROM ORE PROCESSED IN A ROTARY FURNACE ON THE CONCHI-TA PROPERTY. RECENT WORK HAS PRODUCED A LIMITED AMOUNT OF CINN-ABAR, MARKETED AS CINNABAR CRYSTALS, AS RECENTLY AS 1980'S. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Comment (Workings): MINE INCLUDES SEVERAL THOUSAND FEET OF UNDERGROUND OPENINGS DEVELOPED ON 6 LEVELS AND SEVERAL LARGE OPEN CUTS. THE- 6 ADITS ARE OPEN AND ACCESSIBLE. IN 1985, THERE WERE THE REMA-INS OF 5 WOOD CABINS ON THE SITE, REMAINS OF FURNACE ROOM WITH- FURNACE STILL PRESENT (3 FT DIAM, 25 FT LONG). POWER LINES RU-NNING INTO FURNACE ROOM STILL UP AND IN GOOD SHAPE. NUMEROUS C-UTS, STOPES,ADITS SCATTERED UP CANYON FROM FURNACE BUILDING AN-D OVER THE HILL TO SOUTH AND INTO SMALL CANYON SOUTH OF FURNAC-E BUILDING.

Comment (Geology): GEOL.COM: ORE OCCURS AS NEARLY PURE CINNABAR VEINLETS FILLING OPENINGS ALONG AND CLOSELY BENEATH THE FAULT; RICHEST ORE OCCURRED AS PODS RESULTING FROM REPLACEMENT OF HIGHLY FRACTURED SILICIFIED DOLOMITE EXTENDING SEVERAL FEET INTO THE FOOTWALL. ORE BODIES LOCALIZED WHERE FAULT "ROLLS" IN STRIKE TOWARD FOOTWALL, FORMING AN INVERTED WHICH GUIDED RISING SOLUTIONS.

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References

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

Reference (Deposit): VANDERBURG, O., 1938, RECONNAISSANCE OF MINING DISTRICTS IN HUMBOLDT CO., NEV; U.S.B.M. INF CIRC. 6995

Reference (Deposit): JONES, R. B., 25 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 (Production): USBM UNPUB DATA

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

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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.