Ore controlOre Along Greenstone-Red Limestone Contact.
Materials
Ore mineralsBementite, Rhodochrosite
GangueJasper, Pyrite
Geology
Host rockGreenstone,Limestone · Metchosin
Associated rockGreenstone · Metchosin Volcanics
StructureThe Lens And Contiguous Pillow Basalt Are Affected By Faulting In The Western Sector Of The Deposit. Two Crossfaults With Opposing Dips Intersect Here; One Offsets The Ore A Few Feet. A Fault Of Greater Displacement Borders The Mineralized Lens On The Northwest And Has Produced A Horizontal Offset Of More Than 25 Feet. Variations In The Basalt-Jasper Contact In Holes 2 And 4 Strongly Suggest Faulting At Depth.
Tectonic settingActive Margin (Leading Edge Of North American Plate)
Economic & production
Development statusOccurrence
Identification
Deposit ID10047958
MRDS IDM700326
Alternate namesBlack Rock Nos. 1, And 3
RegionNA
Data scoreB
Coordinates47.49923, -123.34376
References
WDMG BULL 37, P. 260USGS BULL 931-R, P. 455-456USBM RI 5530, P. 60-62, 77