scholarly journals Drift composition of till and sand samples from the Red Lake/Woman Lake area, district of Red Lake, northern Ontario

1993 ◽  
Author(s):  
D R Sharpe
Keyword(s):  
Lake Area ◽  
Northern Ontario ◽  
Red Lake

Age Relationships of Intrusive Rocks and Ore Deposits in the Red Lake Area, Ontario

1943 ◽  
Vol 51 (1) ◽  
pp. 17-32 ◽  
Author(s):  
H. C. Horwood ◽  
N. B. Keevil
Keyword(s):  
Ore Deposits ◽  
Lake Area ◽  
Red Lake ◽  
Intrusive Rocks

Surface water hydrologic criteria for uranium mine tailings impoundments in Ontario

1981 ◽  
Vol 8 (3) ◽  
pp. 364-369
Author(s):  
Craig T. Bishop ◽  
Robert Bishop
Keyword(s):  
Rehabilitation Program ◽  
Uranium Mine ◽  
Lake Area ◽  
Storm Events ◽  
Northern Ontario ◽  
World Demand ◽  
Water Level Variations ◽  
Tailings Impoundments ◽  
The Cost

In response to the increase in world demand for uranium, mines in the Elliot Lake area of Northern Ontario are being reopened. As part of the rehabilitation program, James F. MacLaren Ltd. was commissioned to undertake studies related to the safe disposal of the radioactive tailings which result from the mining–milling process.Tailings disposal is usually achieved by discharging the tailings slurry and waste rock to an isolated impoundment area. Process water from the slurry and natural runoff from the tailings basin and its drainage area collect at the lowest end of the tailings area. This water must be treated to meet water quality standards set by regulatory agencies. However, no firm criteria (at least for Ontario) for the frequency with which spillage of untreated water might be permitted were discovered. Equally, no criteria regarding the design of an emergency spillway for this type of impoundment were found. In view of this, criteria were developed during these studies using engineering judgement.The evolution of these criteria is discussed in this paper. The hydrologic methods used in the analysis of both long term water level variations and the response to severe storm events are outlined. An example of the application of the criteria for the Elliot Lake area is presented. A method of reducing the cost of meeting these criteria is also discussed. Finally, the need for further independent research on the problem is pointed out.

ARCHAEAN SEDIMENTARY ROCKS OF NORTH SPIRIT LAKE AREA, NORTHWESTERN ONTARIO

1965 ◽  
Vol 2 (6) ◽  
pp. 622-647 ◽  
Author(s):  
J. A. Donaldson ◽  
G. D. Jackson
Keyword(s):  
Volcanic Rocks ◽  
Sedimentary Rocks ◽  
Sole Source ◽  
Lake Area ◽  
Red Lake ◽  
Sedimentary Sequences ◽  
The North ◽  
Northwestern Ontario ◽  
History Of ◽  
Granitoid Rocks

Archaean sedimentary rocks of the North Spirit Lake area show little evidence of having been derived predominantly from associated Archaean volcanic rocks. Instead, compositions of the sediments reflect significant sedimentary and (or) granitoid provenance. A remarkably high content of clastic quartz in thick units of sandstone and conglomerate suggests either reworking of older quartzose sediments, or reduction of the labile constituents in quartz-rich granitoid rocks through prolonged weathering and rigorous transport. Observations for other sedimentary sequences in the region between Red Lake and Lansdowne House suggest that the North Spirit sediments are not unique in the Superior Province. Quartzose sandstones commonly are regarded as atypical of the Archaean, but such rocks arc abundant in northwestern Ontario. Frameworks of many Archaean greywackes actually are richer in quartz than typical greywackes from numerous Proterozoic and Phanerozoic sequences.The concept of rapidly rising volcanic arcs as the sole source of Archaean sedimentary detritus is rejected for the North Spirit area. The volcanies, rather than representing relicts of protocontinents, probably record events removed from initial volcanism in the history of the earth by one or more orogenic cycles. Major unconformities may therefore exist not only between sedimentary and volcanic units, but also between these units and older granitoid rocks.

Resource heterogeneity and fish species diversity in lakes

1984 ◽  
Vol 62 (9) ◽  
pp. 1689-1695 ◽  
Author(s):  
John McA. Eadie ◽  
Allen Keast
Keyword(s):  
Species Diversity ◽  
Fish Species ◽  
Habitat Heterogeneity ◽  
Physical Habitat ◽  
Lake Area ◽  
Resource Heterogeneity ◽  
Shoreline Development ◽  
Northern Ontario ◽  
Resource Diversity ◽  
Fish Species Diversity

We tested the hypothesis that fish species diversity would be positively related to resource diversity in a series of northern and southeastern Ontario lakes. At a macrospatial scale (among lakes), the number of fish species per lake was significantly correlated with two indices of habitat heterogeneity: lake area and the shoreline development factor. At a microspatial scale (among habitats within lakes), detailed analyses revealed several significant correlations between fish species diversity and resource heterogeneity, although some effects of latitude were apparent. Fish species diversity in northern Ontario lakes was positively correlated with the diversity of invertebrate prey (benthos and zooplankton), but not with measures of physical habitat complexity. Species diversity in southern Ontario lakes was positively related to several measures of habitat heterogeneity. Reduction of redundancy in the habitat variables by principal components analysis, followed by multiple regression analyses, showed that fish species diversity in southern lakes was best predicted by substrate diversity and vertical vegetation complexity. Differences in the response of northern and southern fish communities to habitat structure likely relate to glacial history and to characteristics of the different habitats. Our results are consistent with earlier studies and suggest that species diversity – resource diversity relationships, previously reported for terrestrial communities, also apply in aquatic environments.

scholarly journals Surfical geology of the Red Lake-Confederation Lake area, Ontario

1999 ◽  
Author(s):  
H A J Russell ◽  
D R Sharpe ◽  
P Stacey
Keyword(s):  
Lake Area ◽  
Red Lake

scholarly journals Mineralogical study of a low-grade nickel ore from the Red Lake area in Ontario for W.D. Sutherland of Blind River, Ontario

1967 ◽  
Author(s):  
W Petruk ◽  
D C Harris ◽  
R W Buckmaster ◽  
H R Lauder ◽  
R S Kobus
Keyword(s):  
Low Grade ◽  
Lake Area ◽  
Red Lake ◽  
Mineralogical Study

scholarly journals Delineating demographic units of woodland caribou (Rangifer tarandus caribou) in Ontario: cautions and insights

Rangifer ◽  
2012 ◽  
pp. 159-181 ◽  
Author(s):  
Jennifer L. Shuter ◽  
Arthur R. Rodgers
Keyword(s):  
Rangifer Tarandus ◽  
Sampling Effort ◽  
Clustering Methods ◽  
Demographic Structure ◽  
Woodland Caribou ◽  
Convex Polygons ◽  
Northern Ontario ◽  
Cluster Membership ◽  
Red Lake ◽  
Core Areas

Delineating demographic structure across an organism’s range can reveal the extent to which population dynamics in different geographic areas are driven by local or external factors and can be crucial for effective conservation and management. Obtaining optimal data for such analyses can be time and resource-intensive and impending development and resource extraction pressures may necessitate the examination of existing data, even when they are less than ideal. We analyzed a historic telemetry dataset containing satellite radio-collar locations of 73 forest-dwelling woodland caribou in northern Ontario to determine demographic structure. We applied several clustering methods (i.e., agglomerative, divisive and fuzzy k-means) to median seasonal locations. Results were used to distinguish demographic units and minimum convex polygons and fixed-kernel density estimates were used to delineate unit boundaries and core areas. For areas where sampling was considered representative of the distribution of caribou on the landscape, we assessed demographic distinctness by evaluating intra-individual variation in cluster membership, membership strength and distance between boundaries and core areas of adjacent units. The number and composition of clusters identified was similar among methods and caribou were grouped into 6 general clusters. The distinctions between the three clusters identified in the central portion of the province (i.e., Lac Seul, Wabakimi, Geraldton) and the two clusters identified in the eastern portion of the province (i.e., Cochrane and Cochrane-Quebec) were determined to represent demographic structuring. Additional distinctions in other areas (i.e., between The Red Lake and Lac Seul clusters in the west and between the central and eastern clusters) may just be artifacts of the original sampling effort. Amongst demographic units, there was no evidence of individual flexibility in cluster membership and average membership strength was very high. There was little to no overlap between boundaries and core areas of adjacent units, but distances between adjacent unit boundaries were relatively low. Additional sampling effort is needed to further delineate demographic structure in Ontario caribou.

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