Michelle Y Dewolfe

Mount Royal University | MT Royal · Department of Earth Sciences

The Sunrise volcanogenic massive sulfide (VMS) deposit is a banded, polymetallic Zn-Pb-Cu-Ag sulfide lens hosted by felsic volcanic rocks of the Neoarchean Beaulieu River volcanic belt in the western Slave craton in the Sunset Lake area of the Northwest Territories, Canada. With historic indicated resources of 1.52 Mt at 5.99% Zn, 2.39% Pb, 0.08% C...

The Powderhouse formation of the Paleoproterozoic Snow Lake arc assemblage comprises the stratigraphic footwall to six volcanogenic massive sulfide deposits (VMS) at Snow Lake, Manitoba, Canada. It is interpreted to be a product of voluminous pyroclastic eruptions and concomitant subsidence followed by a period of relative volcanic quiescence that...

The Stroud Breccia is a ≤400 m thick package of dominantly felsic volcaniclastic rocks within the Paleoproterozoic Snow Lake arc assemblage. It stratigraphically overlies the ore-interval for the Anderson, Stall and Rod volcanogenic massive sulfide (VMS) deposits at Snow Lake, Manitoba, Canada and occupies the stratigraphic interval between the und...

The Archean Winter Lake greenstone belt (WGB) in the Slave craton, located ~250 km northeast of Yellowknife in the Northwest Territories, has been underexplored relative to other supracrustal belts in the Slave craton, but shows potential for base-metal mineralization. It consists of lower greenschist to upper amphibolite grade mafic to felsic volc...

Neoarchean volcanic rocks of the Beaulieu River volcanic belt structurally overlie basement rocks of the Sleepy Dragon Complex (ca. 2.85 Ga), approximately 100 km east northeast of Yellowknife. The volcanic belt is comprised of complex lithofacies, including basalt, andesite, rhyolite, and associated volcaniclastic rocks, and hosts the Sunrise volc...

The Archean North Rhyolite is a bimodal suite of rocks located directly northwest of, but structurally separate from, the Kidd Creek volcanogenic massive sulfide deposit, which has produced 140.4 million tonnes of ore grading 2.29 wt% Cu, 6.15 wt% Zn, 0.22% Pb and 86.2 g/t Ag. The stratigraphy of the North Rhyolite is identical to that of the Kidd...

The Hidden formation of the Paleoproterozoic Flin Flon arc assemblage comprises the stratigraphic hanging wall to the volcanogenic massive sulfide (VMS) deposits at Flin Flon, Manitoba, Canada. It represents a basaltic volcanic edifice erupted within a large subsidence structure developed in a rifted-arc environment. It is predominately pillow lava...

The Flin Flon mining district is part of a greenstone belt, the Flin Flon-Glennie Complex, in the Paleoproterozoic Trans-Hudson orogen. Its tectonic history began prior to 1872 Ma with the development of regional folds - the faulted F1 Burley Lake syncline and F2 Hidden Lake syncline - during D1 and D2 intraoceanic accretion of the 1888 Ma Flin Flo...

The Paleoproterozic 1920 unit occurs at the base of the Hidden formation, overlying greater than 90 million tons of volcanogenic massive sulfide deposits at Flin Flon, Manitoba, Canada. The 1920 unit is a laterally discontinuous, Fe-Ti-P-rich basaltic andesite (Fe2O3 12 wt.%, TiO2 1.1 wt.% and P2O5 0.30 wt.%), consisting of massive, pillowed and in...

A detailed study of the geochemical and isotopic characteristics of the volcanic rocks of the Hidden and Louis formations, which make up the hanging wall to the volcanogenic massive sulphide deposits at Flin Flon, Manitoba, was carried out on a stratigraphically controlled set of samples. The stratigraphy consists of the lowermost, dominantly basal...

The hanging wall to the Flin Flon, Callinan, and Triple 7 volcanogenic massive sulphide deposits of the Flin Flon district is composed of the Hidden and Louis formations. The contact between these formations is marked by mafic tuff that represents a hiatus in effusive volcanism. The formations form a composite volcanic edifice that was erupted and...

It is difficult to evaluate when and where glaciers extended across the outer continental shelf off eastern Canada. The outer shelf and upper slope are commonly hard bottomed or have a great thickness of post-glacial sediment, in either case making direct sampling and dating of ice-margin sediment impossible. The timing and extent of glacier ice is...

The Jurassic (201 Ma) quartz-normative continental tholeiitic basalts of the North Mountain Basalt (NMB) Formation of southern Nova Scotia, Canada, record evidence of pervasive silicate-liquid immiscibility. The basalts, up to 400 m thick, typically with phenocrysts of plagioclase (An(50-70)) and clinopyroxene (Wo(40) En(40)Fs(20)), are subdivided...

The Schist Lake and Mandy deposits occur within the Paleoproterozoic Flin Flon Belt, which is part of the southeastern Reindeer Zone of the Trans-Hudson Orogen. They are located on the western edge of the Northwest Arm of Schist Lake in northwestern Manitoba, approximately 4 km southeast of the town of Flin Flon. Detailed mapping (1:2000 scale) of...

Thesis (M. Sc.)--Laurentian University, 2004. Includes bibliographical references.