Ice-movement history and kimberlite indicator mineral dispersal study, Pelly Bay, lower Boothia Peninsula, and Wager Plateau areas, Nunavut, Canada
This study reconstructs the ice flow history of the eastern portion of the Keewatin sector of the Laurentide Ice Sheet by integrating field work, remote imagery, and work by others. The study reveals at least seven ice flow phases during the Wisconsinan, including ice streams. A model was developed...
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ftunivwestonta:oai:ir.lib.uwo.ca:etd-1346 2023-10-01T03:55:09+02:00 Ice-movement history and kimberlite indicator mineral dispersal study, Pelly Bay, lower Boothia Peninsula, and Wager Plateau areas, Nunavut, Canada Ozyer, Carl 2011-08-23T07:00:00Z application/pdf https://ir.lib.uwo.ca/etd/226 https://ir.lib.uwo.ca/context/etd/article/1346/viewcontent/Ozyer_Carl_A_201108_PhD_thesis.pdf https://ir.lib.uwo.ca/context/etd/article/1346/filename/0/type/additional/viewcontent/Ozyer_Carl_A_201108_PhD_thesis_Appendix_A.pdf English eng Scholarship@Western https://ir.lib.uwo.ca/etd/226 https://ir.lib.uwo.ca/context/etd/article/1346/viewcontent/Ozyer_Carl_A_201108_PhD_thesis.pdf https://ir.lib.uwo.ca/context/etd/article/1346/filename/0/type/additional/viewcontent/Ozyer_Carl_A_201108_PhD_thesis_Appendix_A.pdf Electronic Thesis and Dissertation Repository GIS IDW KIM Laurentide Ice Sheet Keewatin Ice Divide M’Clintock Channel Inverse Distance Weighted kimberlite indicator minerals dispersal train ice stream Wager Plateau Boothia Peninsula Chantrey Pelly Bay Nunavut Geochemistry Geology Glaciology text 2011 ftunivwestonta 2023-09-03T07:15:42Z This study reconstructs the ice flow history of the eastern portion of the Keewatin sector of the Laurentide Ice Sheet by integrating field work, remote imagery, and work by others. The study reveals at least seven ice flow phases during the Wisconsinan, including ice streams. A model was developed using inverse distance weighed (IDW) interpolation with GIS to identify and isolate potential kimberlite bedrock sources in kimberlite indicator mineral-rich areas in the Pelly Bay area, Nunavut. Kimberlite indicator mineral (KIM) data were normalized by “peer size” to better understand how KIM grains from three kimberlite sources are distributed within three size fractions of till. The IDW method successfully delineated previously unrecognized KIM dispersal trains that were hidden within the KIM-rich areas. The study also revealed that garnets reached their terminal grade at relatively short distances (2500-7500 m) down ice from their kimberlite sources. Mg-ilmenite is the dominant KIM in the area and Mg-ilmenite-rich samples tend to contain Cr-pyrope and orange garnets, with lesser Cr-diopside and chromite. Mg-olivine in these samples ranges from abundant to none. Mg-olivine-rich KIM in till is associated with the Umingmak kimberlites. Text Boothia Peninsula Ice Sheet Keewatin Nunavut Pelly Bay Umingmak The University of Western Ontario: Scholarship@Western Boothia Peninsula ENVELOPE(-94.000,-94.000,71.001,71.001) Canada Nunavut Pelly Bay ENVELOPE(-89.717,-89.717,68.433,68.433) Umingmak ENVELOPE(-52.533,-52.533,65.850,65.850) |
institution |
Open Polar |
collection |
The University of Western Ontario: Scholarship@Western |
op_collection_id |
ftunivwestonta |
language |
English |
topic |
GIS IDW KIM Laurentide Ice Sheet Keewatin Ice Divide M’Clintock Channel Inverse Distance Weighted kimberlite indicator minerals dispersal train ice stream Wager Plateau Boothia Peninsula Chantrey Pelly Bay Nunavut Geochemistry Geology Glaciology |
spellingShingle |
GIS IDW KIM Laurentide Ice Sheet Keewatin Ice Divide M’Clintock Channel Inverse Distance Weighted kimberlite indicator minerals dispersal train ice stream Wager Plateau Boothia Peninsula Chantrey Pelly Bay Nunavut Geochemistry Geology Glaciology Ozyer, Carl Ice-movement history and kimberlite indicator mineral dispersal study, Pelly Bay, lower Boothia Peninsula, and Wager Plateau areas, Nunavut, Canada |
topic_facet |
GIS IDW KIM Laurentide Ice Sheet Keewatin Ice Divide M’Clintock Channel Inverse Distance Weighted kimberlite indicator minerals dispersal train ice stream Wager Plateau Boothia Peninsula Chantrey Pelly Bay Nunavut Geochemistry Geology Glaciology |
description |
This study reconstructs the ice flow history of the eastern portion of the Keewatin sector of the Laurentide Ice Sheet by integrating field work, remote imagery, and work by others. The study reveals at least seven ice flow phases during the Wisconsinan, including ice streams. A model was developed using inverse distance weighed (IDW) interpolation with GIS to identify and isolate potential kimberlite bedrock sources in kimberlite indicator mineral-rich areas in the Pelly Bay area, Nunavut. Kimberlite indicator mineral (KIM) data were normalized by “peer size” to better understand how KIM grains from three kimberlite sources are distributed within three size fractions of till. The IDW method successfully delineated previously unrecognized KIM dispersal trains that were hidden within the KIM-rich areas. The study also revealed that garnets reached their terminal grade at relatively short distances (2500-7500 m) down ice from their kimberlite sources. Mg-ilmenite is the dominant KIM in the area and Mg-ilmenite-rich samples tend to contain Cr-pyrope and orange garnets, with lesser Cr-diopside and chromite. Mg-olivine in these samples ranges from abundant to none. Mg-olivine-rich KIM in till is associated with the Umingmak kimberlites. |
format |
Text |
author |
Ozyer, Carl |
author_facet |
Ozyer, Carl |
author_sort |
Ozyer, Carl |
title |
Ice-movement history and kimberlite indicator mineral dispersal study, Pelly Bay, lower Boothia Peninsula, and Wager Plateau areas, Nunavut, Canada |
title_short |
Ice-movement history and kimberlite indicator mineral dispersal study, Pelly Bay, lower Boothia Peninsula, and Wager Plateau areas, Nunavut, Canada |
title_full |
Ice-movement history and kimberlite indicator mineral dispersal study, Pelly Bay, lower Boothia Peninsula, and Wager Plateau areas, Nunavut, Canada |
title_fullStr |
Ice-movement history and kimberlite indicator mineral dispersal study, Pelly Bay, lower Boothia Peninsula, and Wager Plateau areas, Nunavut, Canada |
title_full_unstemmed |
Ice-movement history and kimberlite indicator mineral dispersal study, Pelly Bay, lower Boothia Peninsula, and Wager Plateau areas, Nunavut, Canada |
title_sort |
ice-movement history and kimberlite indicator mineral dispersal study, pelly bay, lower boothia peninsula, and wager plateau areas, nunavut, canada |
publisher |
Scholarship@Western |
publishDate |
2011 |
url |
https://ir.lib.uwo.ca/etd/226 https://ir.lib.uwo.ca/context/etd/article/1346/viewcontent/Ozyer_Carl_A_201108_PhD_thesis.pdf https://ir.lib.uwo.ca/context/etd/article/1346/filename/0/type/additional/viewcontent/Ozyer_Carl_A_201108_PhD_thesis_Appendix_A.pdf |
long_lat |
ENVELOPE(-94.000,-94.000,71.001,71.001) ENVELOPE(-89.717,-89.717,68.433,68.433) ENVELOPE(-52.533,-52.533,65.850,65.850) |
geographic |
Boothia Peninsula Canada Nunavut Pelly Bay Umingmak |
geographic_facet |
Boothia Peninsula Canada Nunavut Pelly Bay Umingmak |
genre |
Boothia Peninsula Ice Sheet Keewatin Nunavut Pelly Bay Umingmak |
genre_facet |
Boothia Peninsula Ice Sheet Keewatin Nunavut Pelly Bay Umingmak |
op_source |
Electronic Thesis and Dissertation Repository |
op_relation |
https://ir.lib.uwo.ca/etd/226 https://ir.lib.uwo.ca/context/etd/article/1346/viewcontent/Ozyer_Carl_A_201108_PhD_thesis.pdf https://ir.lib.uwo.ca/context/etd/article/1346/filename/0/type/additional/viewcontent/Ozyer_Carl_A_201108_PhD_thesis_Appendix_A.pdf |
_version_ |
1778523343803121664 |