Manhattan

The Manhattan is a gold mine located in Napa county, California at an elevation of 2,080 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: Manhattan
Secondary: Mc Laughlin Mine
Secondary: Mclaughlin Mine and Plant
Secondary: One Shot

Commodity

Primary: Gold
Secondary: Silver

Location

State: California
County: Napa
District: Knoxville

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

Type: Private Lease
Type: Fee Ownership
Type: Located Claim

Workings

Type: Surface

Ownership

Owner Name: Homestake Mining Co.
Company ID: 404462
Percent: 100.0
Home Office: South Dakota
Info Year: 1995

Production

Year: 1985
Description: Ore Processed 599000 Metric Tonnes
Year: 1985
Description: Gold Recovered 2613 Kilograms
Year: 1986
Description: Ore Processed 927000 Metric Tonnes
Year: 1986
Description: Ore Feed Grade 6 Grams Per Metric Tonne
Year: 1986
Description: Gold Recovered 5381 Kilograms
Year: 1994
Description: Ore Mined 2419461 Mt/Yr
Year: 1994
Description: Gold Production 250000 Tr Oz/Yr
Year: 1995
Description: Ore Processed @ 0.120 Oz/T 2056000 St Ore
Year: 1995
Description: Gold Production 242000 Tr Oz/Yr
Year: 1996
Description: Ore Processed @ 0.096 Oz/St 2485000 St Ore
Year: 1996
Description: Gold Production 826000 Tr Oz/Yr
Year: 1990
Description: Gold Production 267013 Tr Oz/Yr
Year: 1991
Description: Gold Productiom 262719 Tr Oz/Yr
Year: 1992
Description: Gold Production 291094 Tr Oz/Yr
Year: 1993
Description: Gold Production 305312 Tr Oz/Yr

Deposit

Record Type: Site
Operation Category: Plant
Plant Type: Leach
Plant Subtype: Hydromet
Operation Type: Surface
Mining Method: Open Pit
Milling Method: Autoclave-Carbon-In-Pulp-Electrowin
Year First Production: 1985
Discovery Year: 1979
Years of Production:
Organization:
Significant: Y
Deposit Size: L

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Unknown: Mercury
Unknown: Silver
Unknown: Gold

Comments

Comment (Reserve-Resource): AS OF MID 1996 MINING WILL CEASE, THE PRESSURE OXIDATION CIRCUIT WILL SHUT DOWN: FUTURE GOLD PRODUCTION WILL COME FROM PROCESSING LOW GRADE ORE STOCKPILES WHICH IS EXPECTED TO LAST FOR EIGHT YEARS. THE MILL SULFIDE CIRCUITS WILL BE CONVERTED TO CONVENTIONAL DIRECT CYANIDE LEACH FOR PROCESSING THIS ORE. STOCKPILE ORE AS OF 12/31/96; DATA NOT ENTERED IN RESOURCES TABLE.

Comment (Economic Factors): MINING OPERATION CEASED ON JUNE 27 1996: AUTOCLAVES WERE DECOMMISSIONED ON JUNE 28, 96, STOCKPILE WILL BE LEACHED FOR 7 MORE YEARS AT APPROX 120,000 T OZ/YR GOLD PRODUCTION.

Comment (Reserve-Resource): RESERVE COLUMN 2 INDICATES COMPANY INFORMATION FROM HOMESTAKES 1985 ANNUAL REPORT.

Comment (Reserve-Resource): MATRIX 1 COLUMN 2 INDICATES COMPANY INFORMATION FROM HOMESTAKES 1985 ANNUAL REPORT.

Comment (Ownership): HOMESTAKE ACQUIRED THE MANHATTAN MINE PROPERTY (AN OLD MERCURY PRODUCER), FROM BILL WILDER, THE MINE OPERATOR, AND BOB HOFFMAN, ANOTHER MAJOR LAND HOLDER; BOTH MEN RETAIN A ROYALTY INTEREST.

Comment (Deposit): MSHA LOCAT: APPROX 14 MILES EAST OF LOWER LAKE, CA ON MORGAN VALLEY RD. FIRST GOLD WAS POURED ON MARCH 5, 1985. CAPACITY WAS INCREASED TO DESIGN BY EARLY IN 1986, MINING CEASED IN JUNE 27, 1996. AUTOCLAVES DECOMMISSIONED ON JUNE 28, 1996. STOCKPILE WILL BE LEACHED FOR AN OTHER 7 YEARS AT 120,000 T OZ PER YEAR GOLD.

Comment (Economic Factors): AUTOCLAVES WERE DECOMMISSIONED ON JUNE 28, 1996.

References

Reference (Deposit): BIG SKY PAY DIRT, 3/84, P.24A.

Reference (Deposit): MINING JOURNAL, 4/20/84, P.271.

Reference (Deposit): MINING JOURNAL, 2/24/84, P.126.

Reference (Deposit): INTERMOUNTAIN PAY DIRT, 5/84, P.3A,4A.

Reference (Deposit): METALS WEEK, 3/4/85, P.9.

Reference (Deposit): SKILLINGS', 5/25/85, P.15.

Reference (Deposit): MINING RECORD, 6/19/85, P.10.

Reference (Deposit): MINING JOURNAL, V 305/N 7841, 11/29/85, P.408,409,419.

Reference (Deposit): ARGALL, GEORGE O., JR., PERSEVERANCE AND WINNING WAYS AT

Reference (Deposit): MCLAUGHLIN GOLD, ENGINEERING AND MINING JOURNAL, 10/86,

Reference (Deposit): P.26-32.

Reference (Deposit): HOMESTAKE MINING CO., 1985 ANNUAL REPORT, P.11,12.

Reference (Deposit): HOMESTAKE MINING CO., MCLAUGHLIN MINE - GENERAL INFORMATION

Reference (Deposit): SUMMARY, CIRCA 1988, 14PP.

Reference (Deposit): HOMESTAKE MINING CO., PROSPECTUS - OFFER TO PURCHASE,

Reference (Deposit): 6/15/92, PP. 68-71.

Reference (Deposit): SKILLINGS', V 79/N 14, 4/7/90, P.25.

Reference (Reserve-Resource): HOMESTAKE MINING CO., 1994 ANNUAL REPORT, PP. 20-22.

Reference (Reserve-Resource): HOMESTAKE MINING CO., 1994 FORM 10-K REPORT, PP. 6-8.

Reference (Reserve-Resource): HOMESTAKE MINING CO., 1995 ANNUAL REPORT:

Reference (Reserve-Resource): HOMESTAKE MINING CO., 1996 ANNUAL REPORT, PP. 18-19, &

Reference (Deposit): MSHA RPT DATED DEC 1980.

Reference (Deposit): SEE MSHA NO. 0404568

Reference (Deposit): HOMESTAKE MINING CO., FACT SHEET, 8/27/80, 3PP.

Reference (Production): HOMESTAKE MINING CO., 1996 FORM 10-K REPORT, P8.

Reference (Production): HOMESTAKE MINING CO., 1996 ANNUAL REPORT, PP. 18-19.

Reference (Reserve-Resource): HOMESTAKE MINING CO., 1986 ANNUAL REPORT, P.11,12.

Reference (Deposit): HOMESTAKE MINING CO. 1981 ANNUAL REPORT.

Reference (Deposit): MINING RECORD, V 106/N 11, 3/15/95, P.3.

Reference (Deposit): RANDOL MINING DIRECTORY 1993/94, P.174.

Reference (Deposit): RANDOL MINING DIRECTORY 1994/95, P.233.

Reference (Deposit): IC-8252, 1965.

Reference (Deposit): CALIF. DIV. MINES AND GEOL. SPECIAL PUBLICATION 103, 1990.

Reference (Deposit): SKILLINGS' MINING REVIEW. HOMESTAKE PROCEDEDING WITH ITS MC-

Reference (Deposit): PERTIES. WED., JAN. 5, 1983, P. 9.

Reference (Deposit): MINING ENGINEERING. U.S. AND INTERNATIONAL MINERAL NEWS

Reference (Deposit): BRIEFS-UNITED STATES-HOMESTAKE MINING CO. AUGUST, 1982,

Reference (Deposit): P. 1210.

Reference (Deposit): LAUGHLIN GOLD PROJECT. JAN 22, 1983, PP. 3-6.

Reference (Deposit): THE MINING RECORD, V. 107, N34, AUG. 21, 1996, P14.

Reference (Deposit): HOMESTAKE MINING CO. 1982 ANNUAL REPORT.

Reference (Deposit): HOMESTAKE MINING CO. FORM 10-K, 1982.

Reference (Deposit): THE MINING RECORD. MINING FIRMS SEEKING OPEN PIT GOLD PRO-

Reference (Deposit): GOLD MINE AT MCLAUGHLIN MINE. OCT. 1982, P. 9.

Reference (Deposit): WORLD MINING. MCLAUGHLIN GOLD PERMITS SOUGHT. JUNE 1982,P87.

Reference (Deposit): THE MINING RECORD. HOMESTAKE MINING REPORTS ON FINANCES AND

Reference (Deposit): ACTIVITIES. WED., MAY 11, 1983.

Reference (Deposit): CALIFORNIA MINING JOURNAL. HOMESTAKE MINING TRIPLES ESTIMATE

Reference (Deposit): OF CALIFORNIA GOLD FIND. JULY 1981, P. 14,16

Reference (Deposit): U.S. BUREAU OF MINES. MERCURY POTENTIAL OF THE UNITED STATES

Reference (Deposit): KE MINING CO., 1994 FORM 10-K REPORT, PP. 6-8.

Reference (Deposit): SHUCK, D., OLSON, B., AND SMITH, R., BULK SULFIDE FLOTATION

Reference (Deposit): OF LOW-GRADE REFRACTORY ORES AT HOMESTAKE'S MCLAUGHLIN

Reference (Deposit): MINE, PREPRINT NO. 94-143, PRESENTED AT SME ANNUAL MEETING

Reference (Deposit): FEB. 14-17, 1994, 5PP.

Reference (Deposit): MINING CONGRESS JOURNAL. JULY 1981.

Reference (Deposit): THE MINING RECORD. HOMESTAKE REPORTS EARNINGS. WED., JUNE

Reference (Deposit): 16, 1982.

Reference (Deposit): ENGINEERING AND MINING JOURNAL. HOIMESTAKE PLANS OPEN-PIT

Reference (Deposit): MINING CONGRESS JOURNAL. PAYOFF CAME WITHIN FIRST TWO YEARS

Reference (Deposit): OF PROGRAM. JAN. 1982, P. 58.

Reference (Deposit): AMERICAN METALS MARKET. JUNE 11, 1982, PP. 1,8

Reference (Deposit): THE MINING RECORDS. HOMESTAKE IS THE NATIONS LEADING GOLD

Reference (Deposit): PRODUCER. WED., FEB. 25, 1981.

Reference (Deposit): THE MINING RECORD. CALIFORNIA MINERS READY FOR SECOND GOLD

Reference (Deposit): BOOM. WED., JUNE 10, 1981, P. 7.

Reference (Deposit): THE MINING RECORD. HOMESTAKE TRIPLES ESTIMATE OF CALIFORINA

Reference (Deposit): GOLD FIND. WED. MAY 20, 1981, P. 1.

Reference (Deposit): SKILLINGS' MINING REVIEW. APR. 17, 1982, P. 13.

Reference (Deposit): MINING CONGRESS JOURNAL. DISCOVERY OF SIGNIFICANT GOLD MIN-

Reference (Deposit): ERALIZATION. OCT 1980.

Reference (Deposit): WORLD MINING. NORTHERN CALIFORNIA GOLD STILL BEING DISCOV-

Reference (Deposit): MINING JOURNAL, V 314/N 8065, 4/6/90, P.273.

Reference (Deposit): ERED. JULY 1981, P. 27.

Reference (Deposit): NORTHERN MINER, V 79/N 36, 11/8/93, P.15.

California Gold

"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.