Mine detail: Mouat Ni-Cu Verdegris Creek

Previously called 'Mountain View'

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Location: Stillwater County, Montana, United States, North America
Lat / long: 45.37992, -109.89635
dep_id: 10042347
mrds_id: M060102
Commodity type: metallic
Major mineral: Nickel, Copper
Minor mineral: Cobalt
Trace mineral: PGE, Silver, Gold
Operation type: Unknown
Production size: No production occurred
Development status: Prospect
ore: Chalcopyrite, Pentlandite, Pyrrhotite
gangue: Magnetite, Plagioclase
orebody_fm: STRATIFORM, PODS, LENSES, SILL-LIKE BODIES
work_type: Underground
model: 1: Stillwater Ni-Cu
alteration: None Related To Ore-Forming Process
conc_proc: Magmatic Segregation, Liquid Immiscibility
ore_ctrl: Immiscible Sulfide Liquid Enriched In Ni And Cu Exsolved From Mafic Silicate Magma And Accumulated Near Lower Contact Of The Stillwater Complex. Assimilation Of Sulfur From Rocks Adjacent To The Stillwater Complex May Have Led To The Exsolution Of The Sulfide Liquid (Zientek And Ripley, 1990)
Reporter: Dohrenwend, John C., Shaffer, Glenn L., Peterson, Jocelyn A.
hrock_type: Quartz Monzonite,Peridotite,Hornfels
Structure: The Stillwater Complex Is Exposed Along The Northern Margin Of The Beartooth Uplift, One Of Several Laramide Basement-Cored Ranges That Make Up The Rocky Mountain Foreland Of South-Central Montana (Foose And Others, 1961: Kulik And Schmidt, 1988)
tectonic: Tectonic Setting At Time Of Emplacement Of The Stillwater Complex Is Unknown. The Complex Was Emplaced Shortly After A Major Regional, Subduction-Related Magmatic Event That Culminated In Emplacement Of The 2.73-2.79 Ga Granitoid Suite In The Batholith Exposed In The Beartooth Uplift (Wooden And Others, 1991). However, There Is No Evidence That The Magmatism That Formed The Stillwater Complex Is Related To Convergent Margin Tectonics And Magmatism
disc_yr: 1883
discr: Jack Nye, Jimmy And Jonas Hedges
References:
  • Deposit:: ROBY, R.N., 1949, INVESTIGATION OF COPPER-NICKEL DEPOSITS OF THE STILLWATER COMPLEX, STILLWATER AND SWEETGRASS COUNTIES, MONT.: U.S. BUREAU OF MINES REPORT OF INVESTIGATIONS 4431, P. 6-9.
  • Deposit:: CORNWALL, H.R., 1973, NICKEL, IN BROBST, D.A., AND PRATT, W.P., EDS., UNITED STATES MINERAL RESOURCES: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 820, P. 440.
  • Deposit:: CORNWALL, H.R., 1966, NICKEL DEPOSITS OF NORTH AMERICA: U.S. GEOLOGICAL SURVEY BULLETIN 1223, P. 45-46, MAP P.10-11
  • Deposit:: HOWLAND, A.L., 1943-1944, INFORMATION OBTAINED BY ANNY COURY (USGS) THROUGH WRITTEN COMMUNICATION.
  • Deposit:: PAGE, N.J, RILEY, L.B., AND HAFFTY, JOSEPH, 1969, PLATINUM, PALLADIUM, AND RHODIUM ANALYSES OF ULTRAMAFIC AND MAFIC ROCKS FROM THE STILLWATER COMPLEX, MONTANA: U.S. GEOLOGICAL SURVEY CIRCULAR 624, P. 6.
  • Deposit:: PAGE, N.J, ROWE, J.J., AND HAFFTY, JOSEPH, 1976, PLATINUM METALS IN THE STILLWATER COMPLEX, MONTANA: ECONOMIC GEOLOGY, V. 71, P. 1356.
  • Deposit:: ZIENTEK, M.L., 1993, MINERAL RESOURCE APPRAISAL FOR LOCATABLE MINERALS: THE STILLWATER COMPLEX, IN HAMMARSTROM, J.M., ZIENTEK, M.L., AND ELLIOTT, J.E., EDS., MINERAL RESOURCE ASSESSMENT OF THE ABSAROKA-BEARTOOTH STUDY AREA, CUSTER AND GALLATIN NATIONAL FORESTS, MONTANA: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 93-207, P. F1-F83.
  • Deposit:: HOWLAND, A.L., PEOPLES, J.W., AND SAMPSON, EDWARD, 1936, THE STILLWATER IGNEOUS COMPLEX AND ASSOCIATED OCCURRENCES OF NICKEL AND PLATINUM GROUP METALS: MONTANA BUREAU OF MINES AND GEOLOGY MISCELLANEOUS CONTRIBUTION 7, P. 10-11.
  • Deposit:: PREMO, W.R., HELZ, R.T., ZIENTEK, M.L., AND LANGSTON, R.B., 1990, U-PB AND SM-ND AGES FOR THE STILLWATER COMPLEX AND ITS ASSOCIATED SILLS AND DIKES, BEARTOOTH MOUNTAINS, MONTANA: IDENTIFICATION OF A PARENT MAGMA?: GEOLOGY, V. 18, P. 1065-1068.
  • Deposit:: ZIENTEK, M.L., AND RIPLEY, E.M., 1990, SULFUR ISOTOPIC STUDIES OF THE STILLWATER COMPLEX AND ASSOCIATED ROCKS, MONTANA: ECONOMIC GEOLOGY, V. 85, P. 376-391.
  • Deposit:: PAGE, N.J, 1979, STILLWATER COMPLEX, MONTANA - STRUCTURE, MINERALOGY, AND PETROLOGY OF THE BASAL ZONE WITH EMPHASIS ON THE OCCURRENCE OF SULFIDES: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1038, 69 P.
  • Deposit:: ZIENTEK, M.L., FOOSE, M.P., AND MEI, LEUNG, 1986, PALLADIUM, PLATINUM, AND RHODIUM CONTENTS OF ROCKS NEAR THE LOWER MARGIN OF THE STILLWATER COMPLEX, MONTANA: ECONOMIC GEOLOGY, V. 81, P. 1169-1178.
  • Deposit:: 1937 DIREXPL ANACONDA CO.
  • Deposit:: 1940 DIREXPL
  • Reserve-Resource:: CORNWALL, 1973
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