Montana · Jefferson County
Plant

Montana Tunnels/Diamond Hill

Jefferson County, Montana, United States
SilverLeadGoldZinc
⌖ Show on mapUSGS source ↗
Commodities
PrimarySilver, Lead, Gold, Zinc
Commodity typeM
Deposit
Deposit typeDiatreme, polymetallic, disseminated, Au-bearing
Model84: Alkaline Au-Te (Au-Ag-Te veins)
WorkingsSurface
Orebody formPIPE-LIKE
Materials
Ore mineralsChalcopyrite, Electrum, Galena, Pyrite, Sphalerite, Proustite, Pyrargyrite
Geology
Host rockAndesite,Latite · "ELKHORN MOUNTAINS VOLCANICS", "LOWLAND CREEK VOLCANICS"
Associated rockGranodiorite · BOULDER BATHOLITH; LOWLAND CREEK VOLCANICS
Economic & production
Development statusPlant
First production1987
Discovery year1981
Identification
Deposit ID10124812
MRDS IDDB02213
Alternate namesMontana Tunnels ProjectMontana Tunnels
RegionNA
Data scoreA
Coordinates46.3721, -112.13418
References
ENGINEERING AND MINING JOURNAL. MINING ACTIVITY DIGEST. MAY, 1986, P. 8.MINING CHEMICALS HANDBOOK. MINERAL DRESSING NOTES NO. 26. AMERICAN CYANIMID COMPANY. 1986, 178 P.MONTANA DEPARTMENT OF STATE LANDS. MONTANA TUNNELS PROJECT - DRAFT ENVIRONMENTAL IMPACT STATEMENT. HELENA, MT .NOV., 1985.SILLITOE, R., GEOLOGY AND GEOCHEMISTRY OF THE MONTANA TUNNELS OREBODY, MONTANA: A DIATREME-HOSTED GOLD DEPOSIT. NORTHWEST MINING ASSOCIATION METALS AND MINERALS CONFERENCE. SPOKANE, WA., APRIL, 1985.SILLITOE, R., GRAUBERGER, G AND ELLIOTT, J. A DIATREME HOSTED GOLD DEPOSIT AT MONTANA TUNNELS, MONTANA. ECONOMIC GEOLOGY MAGAZINE, VOL. 80, 1985, P. 1707-1721.SKILLINGS MINING REVIEW. USMX/PEGASUS GOLD INC.'S MONTANA TUNNELS PROJECT - OVERVIEW AND UPDATE. DEC. 6, 1986 P. 4.SPOKESMAN REVIEW. PEGASUS GOLD AWARDS MILL PROJECT, CONTRACT. MAY 30, 1986.U.S. MINERALS EXPLORATION COMPANY. ANNUAL REPORT. 1986,WRIGHT ENGINEERS LTD. FEASIBILITY STUDY-MONTANA TUNNELS PROJECT. VANCOUVER, CANDADA. OCT., 1985.WALLACE MINER. MONTANA TUNNELS TO USE HELENA SMELTER. DEC. 4, 1986, P.1.U.S.M.X. 1986 ANNUAL REPORT.PEGASUS GOLD INC., 1991 ANNUAL REPORT, P 4- 5, 9-10.USMX, INC. NEWS RELEASE. "USMX, INC. IN AGREEMENT TO SELL INTEREST IN MONTANA TUNNELS MINE TO PEGASUS GOLD CORPORATION, 6/25/96.THE MINING RECORD, VOL 107, #34, AUG., 21, 1996, P19.THE MINING RECORD, VOL 107, #49, 12/04/96, PP. 8, 9.RANDOL MINING DIRECTORY, 1996/97, U.S. MINES AND MINING COMPANIES, P220.USGS PROFESSIONAL PAPER 428., P.81, PLATE 1.USGS BULLETIN 527, P. 116.Sillitoe R H, Grauberger G L, Elliott J E 1985 - A diatreme-hosted Gold deposit at Montana tunnels, Montana: in Econ. Geol. v80 1707-1721PEGASUS GOLD INC., 1995 FORM 10-K REPORT, P17.PEGASUS GOLD INC., 1996 FORM 10-K REPORT, P12.MAT 1 COL'S 1 & 2 FROM U.S.M.X. 1996 ANNUAL REPORT.MONTANA BUREAU OF MINES AND GEOLOGY, BUL. #129, 1991.PEGASUS GOLD INC., 1995 ANNUAL REPORT, PP. 6-7 & FORM 10-K REPORT, PP. 9, 17.PEGASUS GOLD INC., 1996 ANNUAL REPORT, PP. 6-7 & FORM 10-K REPORT, PP. 12-13.