The source of uranium for the Lac Cinquante uranium deposit, Nunavut, Canada
1 online resource (154 pages) : illustrations (some colour), maps (some colour), charts (some colour), graphs (some colour) Includes abstract and appendices. Includes bibliographical references (pages 79-86). The Lac Cinquante uranium deposit is hosted in an Archean greenstone belt below the Paleopr...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
Halifax, N.S. : Saint Mary's University
2024
|
Subjects: | |
Online Access: | http://library2.smu.ca/xmlui/handle/01/31945 |
id |
ftstmarysunivca:oai:library2:01/31945 |
---|---|
record_format |
openpolar |
spelling |
ftstmarysunivca:oai:library2:01/31945 2024-06-23T07:51:30+00:00 The source of uranium for the Lac Cinquante uranium deposit, Nunavut, Canada Avery, Gracie Adlakha, Erin Nunavut 2024-04-27 application/pdf http://library2.smu.ca/xmlui/handle/01/31945 en eng Halifax, N.S. : Saint Mary's University http://library2.smu.ca/xmlui/handle/01/31945 Text 2024 ftstmarysunivca 2024-06-03T23:35:56Z 1 online resource (154 pages) : illustrations (some colour), maps (some colour), charts (some colour), graphs (some colour) Includes abstract and appendices. Includes bibliographical references (pages 79-86). The Lac Cinquante uranium deposit is hosted in an Archean greenstone belt below the Paleoproterozoic Baker Lake Basin, Nunavut, and is currently characterized as a vein-type uranium deposit. Vein-type uranium deposits are usually spatially associated with source granitoids and consist of uranium mineralization concentrated in fractures, shear zones, and stockworks. The source of uranium in the Lac Cinquante is unknown and is determined in this study through petrographic work and trace element analysis of uranium minerals. We hypothesize that the uranium was sourced in one of two ways: either uranium was leached from apatite, zircon, or monazite, or sourced from exsolved fluids, from nearby c. 1.84 Ga Hudsonian granites or the uranium was sourced from glass, or fluids related to, the c. 1.83 – 1.81 Ga potassic volcanic rocks (Christopher Island Formation; CIF) of the Baker Lake Group. Petrographic work including micro-XRF mapping and scanning electron microscopy confirm the complete paragenetic history of the Lac Cinquante uranium deposit: i) primary minerals of the host rock including plagioclase and quartz, ii) albitization of plagioclase, iii) formation of uraninite, brannerite, hydrothermal zircon, apatite, (± barite, pyrite, chalcopyrite, molybdenite, sphalerite, and galena) in calcite and albite veins, and iv) hematite, carbonate, and chlorite alteration. Pervasive albitization of the host rocks, the complex mineralogy (brannerite, hydrothermal zircon, apatite), and the distinct geochemistry (high Ti, Ba, Zr) indicate reclassification of this deposit as Na-metasomatic uranium deposit is warranted. Furthermore, trace element data of uraninite and brannerite reveals four distinct chondrite normalized REE patterns with flat (i.e. none) to positive Eu anomalies and enrichments in LREE/HREE. These ... Text Baker Lake Nunavut Saint Mary's University, Halifax: Institutional Repository Canada Nunavut The Baker ENVELOPE(-54.765,-54.765,49.667,49.667) |
institution |
Open Polar |
collection |
Saint Mary's University, Halifax: Institutional Repository |
op_collection_id |
ftstmarysunivca |
language |
English |
description |
1 online resource (154 pages) : illustrations (some colour), maps (some colour), charts (some colour), graphs (some colour) Includes abstract and appendices. Includes bibliographical references (pages 79-86). The Lac Cinquante uranium deposit is hosted in an Archean greenstone belt below the Paleoproterozoic Baker Lake Basin, Nunavut, and is currently characterized as a vein-type uranium deposit. Vein-type uranium deposits are usually spatially associated with source granitoids and consist of uranium mineralization concentrated in fractures, shear zones, and stockworks. The source of uranium in the Lac Cinquante is unknown and is determined in this study through petrographic work and trace element analysis of uranium minerals. We hypothesize that the uranium was sourced in one of two ways: either uranium was leached from apatite, zircon, or monazite, or sourced from exsolved fluids, from nearby c. 1.84 Ga Hudsonian granites or the uranium was sourced from glass, or fluids related to, the c. 1.83 – 1.81 Ga potassic volcanic rocks (Christopher Island Formation; CIF) of the Baker Lake Group. Petrographic work including micro-XRF mapping and scanning electron microscopy confirm the complete paragenetic history of the Lac Cinquante uranium deposit: i) primary minerals of the host rock including plagioclase and quartz, ii) albitization of plagioclase, iii) formation of uraninite, brannerite, hydrothermal zircon, apatite, (± barite, pyrite, chalcopyrite, molybdenite, sphalerite, and galena) in calcite and albite veins, and iv) hematite, carbonate, and chlorite alteration. Pervasive albitization of the host rocks, the complex mineralogy (brannerite, hydrothermal zircon, apatite), and the distinct geochemistry (high Ti, Ba, Zr) indicate reclassification of this deposit as Na-metasomatic uranium deposit is warranted. Furthermore, trace element data of uraninite and brannerite reveals four distinct chondrite normalized REE patterns with flat (i.e. none) to positive Eu anomalies and enrichments in LREE/HREE. These ... |
author2 |
Adlakha, Erin |
format |
Text |
author |
Avery, Gracie |
spellingShingle |
Avery, Gracie The source of uranium for the Lac Cinquante uranium deposit, Nunavut, Canada |
author_facet |
Avery, Gracie |
author_sort |
Avery, Gracie |
title |
The source of uranium for the Lac Cinquante uranium deposit, Nunavut, Canada |
title_short |
The source of uranium for the Lac Cinquante uranium deposit, Nunavut, Canada |
title_full |
The source of uranium for the Lac Cinquante uranium deposit, Nunavut, Canada |
title_fullStr |
The source of uranium for the Lac Cinquante uranium deposit, Nunavut, Canada |
title_full_unstemmed |
The source of uranium for the Lac Cinquante uranium deposit, Nunavut, Canada |
title_sort |
source of uranium for the lac cinquante uranium deposit, nunavut, canada |
publisher |
Halifax, N.S. : Saint Mary's University |
publishDate |
2024 |
url |
http://library2.smu.ca/xmlui/handle/01/31945 |
op_coverage |
Nunavut |
long_lat |
ENVELOPE(-54.765,-54.765,49.667,49.667) |
geographic |
Canada Nunavut The Baker |
geographic_facet |
Canada Nunavut The Baker |
genre |
Baker Lake Nunavut |
genre_facet |
Baker Lake Nunavut |
op_relation |
http://library2.smu.ca/xmlui/handle/01/31945 |
_version_ |
1802642618294730752 |