Statistical analysis of the geological-hydrogeological conditions within part of the Eye-Dashwa Pluton, Atikokan, northwestern Ontario

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doi: 10.1139/e89-033
Authors:Brown, P. A.; Rey, N. A. C.
Author Affiliations:Primary:
Geol. Surv. Can., Ottawa, ON, Canada
Other:
At. Energy Can., Canada
Volume Title:Results of geoscience research in the Canadian Nuclear Fuel Waste Management Program—Résultats de recherches géoscientifiques du Programme canadien de gestion des déchets de combustible nucléaire
Volume Authors:Scott, J. S., editor; Gibb, R. A.
Source:Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre, 26(2), p.345-356; Geological Association of Canada symposium on Results of geoscience research in the Canadian Nuclear Fuel Waste Management Program—Résultats de recherches géoscientifiques du Programme canadien de gestion des déchets de combustible nucléaire, Ottawa, ON, Canada, May 9, 1986, edited by J. S. Scott and R. A. Gibb. Publisher: National Research Council of Canada, Ottawa, ON, Canada. ISSN: 0008-4077
Publication Date:1989
Note:In English with French summary. 41 refs.; illus. incl. 8 tables
Summary:The occurrence and distribution of fracture-filling material within the Eye-Dashwa granite indicate that the dominant fracture system was formed shortly after emplacement and cooling of the pluton at 2678 +- 67 m.y. Subsequent reactivation of these ancient fractures was accompanied by sequentially younger and lower-T filling materials. These reopened ancient fractures are best developed in the upper 300-400 m of the rock mass and are commonly conduits for present-day groundwater flow. Multiple linear regression analysis performed on the geological variables defined from boreholes ATK-1,-2,-3,-4, and -5 identified a highly significant correlation between a number of these variables and hydraulic conductivity values measured in 25 m test sections of the boreholes. The correlation is expressed as log Kerm = - 2.123 - [3.065 times log(DEPTH)] + [0.749 times log(CLAY)] - [0.762 times log(VEIN)] where log Kerm is the log of hydraulic conductivity, log(DEPTH) is the log-transformed depth to the lower end of the packer interval, log(CLAY) is the log- transformed frequency of clay-filled fractures per 25 m interval, log(VEIN) is the log-transformed frequency of veins per 25 m interval. [This paper and those represented by the three additional abstracts were presented at a symposium on the results of geoscience research in the Canadian Nuclear Fuel Waste Management Program.]
Subjects:Boreholes; Distribution; Emplacement; Engineering geology; Fractures; Granites; Ground water; High-level waste; Hydraulic conductivity; Igneous rocks; Intrusions; Patterns; Plutonic rocks; Plutons; Radioactive waste; Regression analysis; Site exploration; Statistical analysis; Structural analysis; Surveys; Waste disposal; Atikokan Ontario; Canada; Canadian Shield; Eastern Canada; Eye-Dashwa Lakes Pluton; North America; Ontario; Rainy River District Ontario; Northwestern Ontario
Coordinates:N485000 N490000 W0914000 W0915000
Record ID:1989046680
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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