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Geochemistry and source-tracing of the Sparrow Dyke Swarm, the Tsu Lake dykes, the Martin Group Igneous Rocks and the Christopher Island Formation Open Access

Descriptions

Other title
Subject/Keyword
Churchill
Paleoproterozoic
Sparrow
CIF
dykes
1.83Ga
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
D'Souza, Rameses J.
Supervisor and department
Chacko, Thomas (Earth and Atmospheric Sciences)
Heaman, Larry (Earth and Atmospheric Sciences)
Examining committee member and department
Chacko, Thomas (Earth and Atmospheric Sciences)
Kravchinsky, Vadim (Physics)
Heaman, Larry (Earth and Atmospheric Sciences)
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2012-01-31T15:06:02Z
Graduation date
2012-06
Degree
Master of Science
Degree level
Master's
Abstract
The present study has determined that tholeiitic basalt dykes, trending 130, found near Tsu Lake, NT, are geochemically similar to the Sparrow Dyke Swarm (McGlynn et al., 1974). Geochemically, the correlation of the calc-alkaline basalts of the Martin Group Igneous Rock (MGIR) with the Sparrow (Morelli et al., 2009), is invalid as the former display higher incompatible element concentrations. Rather, the MGIR are geochemically similar to the ultrapotassic Christopher Island Formation (CIF). Of these three suites, the Sparrow shows the least negative ϵNd, the CIF is the most negative and the MGIR is intermediate. Initial 87Sr/86Sr of these suites is similar within error. This is interpreted as evidence that the intensity of the metasomatism responsible for enriching the lithospheric mantle source of the CIF (Cousens et al., 2001) began to wane towards the SW, where the MGIR were sourced, and was minimal where the Sparrow swarm was sourced.
Language
English
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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