Montana · Phillips County
Past Producer

Zortman Mine

Phillips County, Montana, United States
GoldSilver
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold
TertiarySilver
Commodity typeM
Deposit
Deposit typeAu-Ag-Te vein
Model84: Alkaline Au-Te (Au-Ag-Te veins)
WorkingsSurface
Materials
Ore mineralsGold, Silver, Sylvanite, Calaverite, Hessite, Pyrite, Sphalerite
GangueFluorite, Calcite
Geology
Host rockQuartz Monzonite,Syenite,Rhyolite,Quartz Latite,Rhyodacite · "QUARTZ MONZONITE", "SYENITE", "RHYOLITE", "QUARTZ LATITE", "RHYODACITE "
Associated rockTrachyte,Sedimentary Rock,Metasedimentary Rock · "TRACHYTE PORPHYRY", "SEDIMENTS", "METASEDIMENTS"
Economic & production
Development statusPast Producer
First production1979
Discovery year1975
Identification
Deposit ID10124596
MRDS IDW015572
Alternate namesZortman-Landusky Mine and Plants, August Mine, Little Ben, Rudy Gulch MineZortman, Zortman ExtensionLandusky, Independent, Alabama, Gold Bug
RegionNA
Data scoreA
Coordinates47.90993, -108.61998
References
DAYTON, S.H., 1983, PEGASUS GOLD BUILDING A FUTURE FROM WHAT MAY BE THE WORLD?S LOWEST-GRADE BUT LARGEST HEAP LEACHING OPERATION: ENGINEERING AND MINING JOURNAL, DECEMBER, 1983, P. 24-28.CORRY, A.V., 1933, SOME GOLD DEPOSITS OF BROADWATER, BEAVERHEAD, PHILLIPS, AND FERGUS COUNTIES, MONTANA: MONT. BUREAU OF MINES AND GEOL. MEM. 10, P. 30-36MINE/DEPOSIT FILE REPORT: AUGUST, GOLD BUG, LITTLE BEN, RUBY GULCH MINES, ZORTMAN-LANDUSKY MINING COMPANIES, ZORTMAN, MT, USBM CONTRACT NO. SO221028, APRIL, 1983.MONTANA DEPARTMENT OF STATE LANDS, DRAFT ENVIRONMENTAL IMPACT STATEMENT, PROPOSED PLAN OF MINING AND RECLAMATION, INTERNATIONAL MINING NEWS, VOL., 107, #47, 11/20/96, P1.PEGASUS GOLD LTD. 1983 ANNUAL REPORT. 22 PP.PEGASUS GOLD INC. 1984 ANNUAL REPORT. P. 12.PEGASUS GOLD INC. FORM 10-K. DEC. 31, 1984, 18 PP.PEGASUS GOLD INC. 1985 ANNUAL REPORT. 37 PP.PEGASUS GOLD INC. FORM 10-K. DEC. 31, 1985, 65 PP.PEGASUS GOLD INC. 1986 ANNUAL REPORT. 41 PP.PEGASUS GOLD INC. PROSPECTUS (GOLDMAN, SACHS & CO., E.F. HUTTON AND COMPANY INC., PRUDENTIAL-BACHE CAPITAL FUNDING) JULY 20, 1987, 44 PP. PLUS F-53 P. FINANCIAL STATEMENT.PEGASUS GOLD INC. 1987 ANNUAL REPORT. 37 PP.PEGASUS GOLD INC. CORPORATE PROFILE. SPRING, 1987, 21 PP.PEGASUS GOLD INC. 1988 CORPORATE PROFILE. 21 PP.PEGASUS GOLD INC. 1988 ANNUAL REPORT. 36 PP.ENDAR YEAR 1990, P. 27. ANNUAL REPORT. 49 PP.LOEWEN, ONDAATJE, MCCUTCHEN & COMPANY LIMITED. MONITOR REPORT - PEGASUS GOLD INC. MAR. 20, 1990. 8 PP.PEGASUS GOLD INC. PROXY STATEMENT. APRIL 27, 1990, 13 PP.PEGASUS GOLD INC. PEGASUS GOLD REPORTS THIRD QUARTER RESULTS. OLT. 26, 1990, 2. PP.E&MJ. THE NEW DRILLING AND BLASTING DIMENSION AT PEGASUS. GOLD. MAY, 1986, 5 PP. REPRINT.PEGASUS GOLD INC. FORM 10-K. DEC. 31, 1989.NORTHERN MINER PRESS. AMERICAN MINES HANDBOOK-1990. PP. 148-149.BROOK HUNT & ASSOCIATES LTD. INDEPENDENT RESEARCH INTO METAL AND MINERAL RESOURCES AND THEIR MARKETS. 1986, PP. 350-353.CROWHURST, J.J. DISCOVERY AND DEVELOPMENT OF THE PEGASUS OPERATION AT ZORTMAND AND LANDUSKY, PHILLIPS COUNTY, MONTANA IN: CASE HISTORIES OF MINERAL DISCOVERIES, V. 2, DISCOVERIES OF VALUABLE MINERALS AND PRECIOUS METALS DEPOSITS RELATED TO INTRUSIONS AND FAULTS. V.F. HOLLISTER, ED., SME-AIME, 1990, P. 117.ROGERS, LESLIE M., AND M. STEPHEN ENDERS. SYENITE-HOSTED GOLD DEPOSITS OF THE LITTLE ROCKY MOUNTAINS, MONTANA. IN: CASE HISTORIES OF MINERAL DISCOVERIES, V. 2., DISCOVERIES OF VALUABLE MINERALS AND PRECIOUS METALS DEPOSITS RELATED TO INTRUSIONS AND FAULTS. V.E. HOLLISTER, ED., SME-AIME, 1990, PP. 117-130.HASTINGS, J.S. GOLD DEPOSITS OF ZORTMAN-LANDUSKY, LITTLE ROCKY MOUNTAINS, MONTANA. IN: BULK MINEABLE PRECIOUS METAL DEPOSITS OF THE WESTERN UNITED STATES SYMPOSIUM PROCEEDINGS. GEOL. SOC. OF NEVADA, RENO, NV, 1988, PP 187-205.ENDERS, M.S., AND L.M. ROGERS. DESIGN OF THE GEOLOGIC PROGRAM AT THE ZORTMAND AND LANDUSKY MINES, LITTLE ROCKY MOUNTAINS, MONTANA. SME-AIME PREPRINT NO. 83-373, 9 PP.PROGRAM AT THE ZORTMAND AND LANDUSKY MINES, LITTLE ROCKY MOUNTAINS, MONTANA. SME-AIME PREPRINT NO. 83-373, 9 PP.RIPLEY, RICHARD. PEGASUS MAY OPEN UNTAPPED GOLD DEPOSITS. SPOKANE JOURNAL OF BUSINESS, NOV. 21, 1990. 2 PP.MONTANA STANDARD. TOP CYANIDE LEACHING SITES LISTED. APT. 10, 1990. UNKNOWN P.MCCULLOCH, ROBIN. UNPUBLISHED DATA ON THE ZORTMAN-LANDUSKY PROPERTY, FEB. 1991, 1 P.RANDOL MINING DIRECTORY. 1990/1991. U.S. MINES AND MININGCOMPANIES. ZORTMAN-LANDUSKY MINE, 1990, PP. 43, 189.MONT. BUREAU OF MINES AND GEOL. BULLETIN 129, 1991GOLD GAZETTE, 7/3/95, P.13.BUSINESS WIRE. "ZORTMAN RECEIVES RECORD OF DECISION" 10/28/96. 1P.THE MINING RECORD, VOL., 107, #49, 12/4/96, PP. 8, 9.PEGASUS GOLD NEWS RELEASE, JULY 22, 1996.PEGASUS GOLD NEWS RELEASE, SEPT.30, 1996.THE MINING RECORD, VOL 107, N47, NOV., 20, 1996, P1.THE MINING RECORD, VOL 83, #18, JUNE 30, 1997, P14.ZORTMAN MINING CO. AND LANDUSKY MINING CO., PHILLIPS CO., MONTANA (UNDATED).CANADIAN MINES HANDBOOK 1981-82, P. 277.WORLD MINING, SEPT. 1982, P. 71.Wilson M R, Kyser T K 1988 - Geochemistry of porphyry-hosted Au-Ag deposits in the Little Rocky Mountains, Montana: in Econ. Geol. v83 pp 1329-1346PLEXUS GOLD IN. 1985 ANNUAL REPORT.PEGASUS GOLD INC., 1994 ANNUAL REPORT, P5 & 10-K, PP. 12-13.MINING RECORD, PEGASUS INCREASES RESERVES 14 PERCENT IN THREE MONTHS, V 106/N 18, 3/29/95, PP. 1, 4.PEGASUS GOLD INC., 1995 10-K REPORT, PP. 9, 13-14.PEGASUS GOLD INC., 1995 ANNUAL REPORT, PP. 6-7, 11-13.PEGASUS GOLD INC., 1996 ANNUAL REPORT, PP. 6-7, & FORM 10-K REPORT, PP. 8, 15-16.