Geological Constraints For High-level Nuclear Waste Disposal In The East Bull Lake Gabbro-anorthosite Layered Intrusion, Algoma District, Ontario
As part of the program for assessing the concept of disposing nuclear fuel waste in plutonic rocks, Atomic Energy Canada Limited (AECL) has chosen to investigate the East Bull Lake gabbro-anorthosite layered instrusion. This lopolith occupies an area of four by thirteen kilometres, in the Superior s...
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ftunivwestonta:oai:ir.lib.uwo.ca:digitizedtheses-2847 2023-10-01T03:56:42+02:00 Geological Constraints For High-level Nuclear Waste Disposal In The East Bull Lake Gabbro-anorthosite Layered Intrusion, Algoma District, Ontario Pinto, Coelho Paulino 1989-01-01T08:00:00Z application/pdf https://ir.lib.uwo.ca/digitizedtheses/1848 https://ir.lib.uwo.ca/context/digitizedtheses/article/2847/viewcontent/NL51742.PDF unknown Scholarship@Western https://ir.lib.uwo.ca/digitizedtheses/1848 https://ir.lib.uwo.ca/context/digitizedtheses/article/2847/viewcontent/NL51742.PDF Digitized Theses Geology text 1989 ftunivwestonta 2023-09-03T07:20:10Z As part of the program for assessing the concept of disposing nuclear fuel waste in plutonic rocks, Atomic Energy Canada Limited (AECL) has chosen to investigate the East Bull Lake gabbro-anorthosite layered instrusion. This lopolith occupies an area of four by thirteen kilometres, in the Superior structural province, north of Lake Huron, Ontario, from which the continental ice sheet retreated less than 10,000 years ago. The lopolith is traversed by swarms of younger Proterozoic dykes, three major faults which have provoked periods of movement, and a myriad of cooling joints, cracks, and hydraulic fractures now occupied by comb textured calcite, prehnite, chlorite, quartz and feldspars, an average 6.7 mm wide and on average 8.3 cm apart. The relative abundance of isotopes of oxygen and carbon in calcite filling fractures indicates repeated deposition from mixed hydrous magmatic fluid and salt fluids at temperatures at or above 200{dollar}\sp\circ{dollar}C. Major and minor element abundances indicate a low K high Al tholeiitic character of the intrusion. A bimodal chemical trend, REE data and a rubble zone across the entire intrusion, suggest that multiple intrusion may have taken place in the layered complex. Vein and immediate wallrock composition indicates diffusion from fractures into the rock for a maximum 6.5 cm with major introduction of H{dollar}\sb2{dollar}O and CO{dollar}\sb2{dollar}.;Considering the evidence of present and past high horizontal stresses and the indications of high hydraulic conductivity in the past, it is inadvisable to select this area as a disposal site before better evaluation of fracturing, stress history, hydrology of the site, and their relationship to waste confinement. Text Ice Sheet The University of Western Ontario: Scholarship@Western Bull Lake ENVELOPE(161.700,161.700,-77.533,-77.533) Canada |
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The University of Western Ontario: Scholarship@Western |
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ftunivwestonta |
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unknown |
topic |
Geology |
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Geology Pinto, Coelho Paulino Geological Constraints For High-level Nuclear Waste Disposal In The East Bull Lake Gabbro-anorthosite Layered Intrusion, Algoma District, Ontario |
topic_facet |
Geology |
description |
As part of the program for assessing the concept of disposing nuclear fuel waste in plutonic rocks, Atomic Energy Canada Limited (AECL) has chosen to investigate the East Bull Lake gabbro-anorthosite layered instrusion. This lopolith occupies an area of four by thirteen kilometres, in the Superior structural province, north of Lake Huron, Ontario, from which the continental ice sheet retreated less than 10,000 years ago. The lopolith is traversed by swarms of younger Proterozoic dykes, three major faults which have provoked periods of movement, and a myriad of cooling joints, cracks, and hydraulic fractures now occupied by comb textured calcite, prehnite, chlorite, quartz and feldspars, an average 6.7 mm wide and on average 8.3 cm apart. The relative abundance of isotopes of oxygen and carbon in calcite filling fractures indicates repeated deposition from mixed hydrous magmatic fluid and salt fluids at temperatures at or above 200{dollar}\sp\circ{dollar}C. Major and minor element abundances indicate a low K high Al tholeiitic character of the intrusion. A bimodal chemical trend, REE data and a rubble zone across the entire intrusion, suggest that multiple intrusion may have taken place in the layered complex. Vein and immediate wallrock composition indicates diffusion from fractures into the rock for a maximum 6.5 cm with major introduction of H{dollar}\sb2{dollar}O and CO{dollar}\sb2{dollar}.;Considering the evidence of present and past high horizontal stresses and the indications of high hydraulic conductivity in the past, it is inadvisable to select this area as a disposal site before better evaluation of fracturing, stress history, hydrology of the site, and their relationship to waste confinement. |
format |
Text |
author |
Pinto, Coelho Paulino |
author_facet |
Pinto, Coelho Paulino |
author_sort |
Pinto, Coelho Paulino |
title |
Geological Constraints For High-level Nuclear Waste Disposal In The East Bull Lake Gabbro-anorthosite Layered Intrusion, Algoma District, Ontario |
title_short |
Geological Constraints For High-level Nuclear Waste Disposal In The East Bull Lake Gabbro-anorthosite Layered Intrusion, Algoma District, Ontario |
title_full |
Geological Constraints For High-level Nuclear Waste Disposal In The East Bull Lake Gabbro-anorthosite Layered Intrusion, Algoma District, Ontario |
title_fullStr |
Geological Constraints For High-level Nuclear Waste Disposal In The East Bull Lake Gabbro-anorthosite Layered Intrusion, Algoma District, Ontario |
title_full_unstemmed |
Geological Constraints For High-level Nuclear Waste Disposal In The East Bull Lake Gabbro-anorthosite Layered Intrusion, Algoma District, Ontario |
title_sort |
geological constraints for high-level nuclear waste disposal in the east bull lake gabbro-anorthosite layered intrusion, algoma district, ontario |
publisher |
Scholarship@Western |
publishDate |
1989 |
url |
https://ir.lib.uwo.ca/digitizedtheses/1848 https://ir.lib.uwo.ca/context/digitizedtheses/article/2847/viewcontent/NL51742.PDF |
long_lat |
ENVELOPE(161.700,161.700,-77.533,-77.533) |
geographic |
Bull Lake Canada |
geographic_facet |
Bull Lake Canada |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Digitized Theses |
op_relation |
https://ir.lib.uwo.ca/digitizedtheses/1848 https://ir.lib.uwo.ca/context/digitizedtheses/article/2847/viewcontent/NL51742.PDF |
_version_ |
1778526792841166848 |