Description
Dumbarton Mines Ltd.
Commodities
SecondaryNickel, Copper
TertiaryPGE
Commodity typeM
Deposit
Deposit sizeU
WorkingsSurface
Orebody formIRREGULAR
Ore controlClose Proximity Of Bird River Sill To Feeder Source And Magmatic Settling Towards Base Of Sill(Ref. No. 3,P316)
Materials
Ore mineralsChalcopyrite, Pentlandite, Pyrrhotite
GangueChlorite, Magnetite, Millerite, Pyrite, Talc
Geology
Host rockPyroxenite
Associated rockDiabase,Gabbro · Bird River Greenstone Belt;Maskwa Lake Quartz Diorite;Lac Dv Bonet Quartz Monzonite Pluton
StructureMaskwa Mine Located In Basal Unit Of Bird River Sill And Volcanic Rocks. Belt Folded In Major Anticline With Axis Plunging E To Se. Prominent Nw-Se Faulting In Belt, Bird River Sill Layered And Differentiated Ultramafic To Anorthositic Gabbro. Compositional Layering Indicates Topfacing South. Intense Nw And W Nw Faulting Present. Sill Is Synvolcanic And Has Avg. Thickness 1000m
Tectonic settingBird River Greenstone Belt Part Of English River Gneissic Block Of Precambrian Shield
AlterationExtensive Near-Surface Supergene Alteration
Economic & production
Development statusProspect
First production1974
Last production1976
Discovery year1974
Identification
Deposit ID10039341
MRDS IDM046987
Alternate namesMaskwa Open Pit, Maskwa West
RegionNA
Data scoreC
Coordinates50.46667, -95.45033
References
ANNIS, CRANSTONE, AND VALLEE, 1978 , KNOWN MIN. CA.: DEPT. ENERGY, MINES RESOURCES CA., BULL. MR 181CANADIAN MINES HANDBOOK, 1973 - 74 : NO. MINER, P. 207COATS, STOCKFORD, AND BUCHAN, 1979, GEOLOGY OF MASKWA WEST NICKEL DEPOSIT, MANITOBA: CANADIAN MINERALOGIST, VOL.17, PP. 309 - 318FOGWILL, DOUGLAS, AND BAMBURAK, JAMES, 1987, MINING IN MANITOBA: MANITOBA ENERGY AND MINES, MINERAL EDUCATION SERIES, 46 P.ANNIS ETAL., 1978 , KNOWN MIN. CA. NOT MINED; FOGWILL AND BAMBURAK, 1987, P. 25.