|and on the mineral exploitation possibilities of BMD .....(BMD owns extensive mineral rights for deposits under the oilsands)|
Mineral Potential Summaries
Prairie-type Microdisseminated Gold Mineralization:
A New Deposit Type In Manitoba's Phanerozoic Rocks
A new deposit type In Manitoba's Phanerozoic Rocks Microdisseminated "Prairie-type" Au mineralization has been identified in Devonian carbonate rocks in west-central Manitoba (Mafeking-Swan River area) (NTS 63C/14). Tectonic reactivation of the Churchill-Superior Boundary Zone and dissolution of the Prairie Evaporite are viewed as critical for the structural preparation of host rocks and as a mechanism for oxygenated Cl-rich saline brine transport of metals to their present locations, respectively. Gold mineralization occurs as <5 micron-sized grains associated with bitumen in massive to concentrically laminated siliceous sinter within pipe-shaped solution chimneys interpreted to represent focused, paleo-brine discharge sites. In addition to gold, hematite, marcasite, jarosite, alloys of Au-Cu-Ag, Fe-Cr-Ni, Cr-Ni, Ni-Cu, Cu-Zn, Cu-Zn-Ni and native Ag, Ni, Zn, Sn, Pb and Bi have been identified. Associated minerals include barite, monazite, celestite, rutile, zircon and sylvite. Sideritic carbonate rims the solution chimneys and hosts microdisseminated chalcopyrite, marcasite, hawleyite/greenockite, Ni phosphate, Cd carbonate, hematite, Cu-Zn alloy and native Ag, Ni, Cu, Sb and Pb. Related minerals include barite, monazite, zircon, and calcium bromide. Nearby present-day saline brine pools are characterized by single and multiple vents or chimneys that are actively precipitating base and precious metal-enriched sulphide minerals.
These chimneys are viewed as possible modern day analogues of the solution chimneys exposed in the Mafeking quarry.
An independant mineralogical and geochemical study undertaken in the Department of Geological Sciences, University of Manitoba has confirmed the nature of the mineralization and describes textural and mineralogical components of the solution chimneys.
For further information see:
Fedikow, M.A.F.1, Bezys, R.K.1, Bamburak, J.D.1, and Abercrombie, H.J.2 1996: Prairie-type microdisseminated Au mineralization - a new deposit type in Manitoba's Phanerozoic rocks (NTS 63C/14); in Manitoba Energy and Mines, Minerals Division, Report of Activities 1996, p.108-121.
1-Manitoba Industry, Trade and Mines, Geological Services,
360-1395 Ellice Avenue, Winnipeg, Manitoba, Canada R3G 3P2
2-Birch Mountain Resources Ltd., 3100, 205 5th Ave. S.W., Calgary, Alberta, Canada T2P 2V7
Ramnath, S.M. 1999: Prairie Type mineralization: A mineralogical and geochemicalstudy of solution chimneys in the Mafeking quarry, Manitoba, Canada: University of Manitoba, Bachelor of Science Thesis, 46p.