Pacific Mine

The Pacific Mine is a tungsten mine located in Humboldt county, Nevada at an elevation of 5,518 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: Pacific Mine
Secondary: Pacific Tunnel

Commodity

Primary: Tungsten

Location

State: Nevada
County: Humboldt
District: Potosi District

Land Status

Land ownership: Private
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: Getchell Mine, Inc.

Production

Year: 1955
Time Period: 1952-1955
Material type: ORE
Description: Cp_Grade: ^Ave. 0.3% Wo3

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Contact Metamorphic
Operation Type: Unknown
Year First Production: 1952
Years of Production:
Organization:
Significant: N
Deposit Size: M

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: W skarn

Orebody

Form: TABULAR

Structure

Type: R
Description: N-S Trending Fault

Type: L
Description: Faulting

Alterations

Not available

Rocks

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

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: 0.2% TO 0.5% WO3, SOME 1% WO3 ORE

Materials

Ore: Scheelite
Gangue: Diopside
Gangue: Calcite
Gangue: Wollastonite

Comments

Comment (Development): MINED PRINCIPALLY BY OPEN PIT BETWEEN 1951 AND 1956 BY GETCHELL MINES, INC., YIELDING A TOTAL OF 279,700 TONS ORE -THAT WAS TRUCKED TO THE GETCHELL MILL. UNDERGROUND MINING BY C-ROSSCUT ADITS AND SHRINKAGE STOPES YIELDED ADDITIONAL ORE DURI-NG THE SAME PERIOD, BUT THE TONNAGE AND GRADE WAS NOT REPORTED- SEPARATELY FROM OTHER COMPANY MINES IN THE DISTRICT. ESTIMATE-D REMAINING RESERVES OF 64000 TONS OF 0.33 % W03 ORE

Comment (Deposit): BOTH OPEN-PIT AND UNDERGROUND MINE, ALTHOUGH PIT ACCOUNTED FOR LARGEST PART OF THE PRODUCTION. TACTITE BODY WAS MINED DOWN DIP APPROX 550 FT IN UNDERGROUND WORKINGS AND OPEN PIT. THE PROPERTY IS ESTIMATED TO HAVE REMAINING RESERVES OF ABOUT 64,000 TONS OR AT 0.33% WO3 ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Comment (Location): 1/4 MILE S. OF VALLEY VIEW MINE

Comment (Deposit): CUTS THE GRANODIORITE CONTACT AT ABOUT 450 FT BELOW THE OUTC-ROP. TACTITE ABOUT 2 FT THICK AND CONTAINING SPARSE SCHEELITE -WAS INTERSECTED AT THE CONTACT. DRIFTING ALONG THE CONTACT TO -THE NORTH OF THE ADIT INTERSECTED SCHEELITE-BEARING ORE OF MIN-ABLE GRADE AND THICKNESS THAT WAS MINED BY SHRINKAGE STOPES UP- TO THE BOTTOM OF THE OPEN PIT.

Comment (Geology): CONTACT TRENDS N, DIPS 55 TO 60 E. TACTITE BODY IS TABULAR, THICKEST NEAR A S-PLUNGING TROUGH FORMED BY GRANODIORITE PROJECTION.

Comment (Deposit): THE LIMESTONE-GRANODIORITE CONTACT CROSSES THE PACIFIC PROPERTY IN AN IRREGULAR N-S LINE WITH THE GRANODIORITE DIP-PING BENEATH THE LIMESTONE AT AN ANGLE OF ABOUT 60E. TACTITE C-ROPS OUT ALONG THE HILL SURFACE IN LENTICULAR,TABULAR BODIES, -SEPARATED BY AREAS IN WHICH EXPOSURES ARE POOR AND TACTITE PRO-BABLY THIN OR ABSENT. THE TACTITE IS WIDEST AND HIGHEST GRADE -IN STEEPLY-PLUNGING TROUGH-LIKE STRUCTURES FORMED AT RE-ENTRAN-TS IN THE CONTACT. ONLY A SMALL FRACTION OF THE TACTITE CONTAI-NS MORE THAN 0.5 % W03 AND MUCH OF IT CONTAINS LESS THAN 0.2 %-. A CURVED BAND OF TACTITE ABOUT 375 FT FROM THE NORTH EDGE OF- THE PROPERTY, INCLUDED A LAYER OF GARNET-RICH MATERIAL FROM 3-TO 5 FT THICK THAT AVERAGED ABOUT 1.0 % W03 FOR A LENGTH OF 10-0 FT. AN ADIT CALLED THE PACIFIC TUNNEL, DRIVEN WEST FROM THE- BASE OF THE HILL PASSES THROUGH ABOUT 600 FT OF CRUSHED ROCK -IN THE GETCHELL FAULT ZONE BEFORE ENTERING SOLID LIMESTONE. AF-TER PASSING THROUGH AN ADDITIONAL 100 FT OF LIMESTONE, THE ADI-T

References

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

Reference (Deposit): HOTZ, P.E., AND WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF THE OSGOOD MOUNTAINS QUADRANGLE HUMBOLDT COUNTY, NEV; U.S.G.S. PROF. PAPER 431.

Reference (Deposit): HOBBS, S.W., AND CLABAUGH, S.E., 194L, TUNGSTEN DEPOSITS OF THE OSGOOD RANGE, HUMBOLDT CO., NEV. U. NEV. BULL, VOL. 40, NO. 5, GEOL. & MIN. SER. NO. 44.

Reference (Deposit): STAGER, H. K., IN PREPARATION, NBMG BULLETIN ON TUNGSTEN DEPOSITS OF NEVADA.

Reference (Deposit): NBMG STAFF, 1985, NBMG OFR 85-3

Reference (Production): HOTZ, P.E. AND WILLDEN, R., 1964; STAGER, IN PREP.

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.