Show simple item record

dc.contributor.authorMa, Svieda
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date.accessioned2018-04-12T15:19:52Z
dc.date.available2018-04-12T15:19:52Z
dc.identifier.urihttp://hdl.handle.net/1974/24004
dc.description.abstractCrustal-scale basement faults persist as long-lived structures that localize deformation and can enhance permeability in the Earth’s crust. The NNW-striking left-lateral Bathurst fault in the eastern Slave craton displaces the 1.9 Ga Kilohigok basin and the ca. 2.07-1.96 Ga Thelon tectonic zone by up to ~ 115 km. The Bathurst fault intersects the 1.7 Ga Thelon basin, where unconformity uranium occurrences are spatially associated with basement faults. This thesis investigates the deformation-temperature-time history of the Bathurst fault rocks using field structural and microstructural observations paired with U-(Th-)Pb and 40Ar/39Ar geochronology. Highly-strained hornblende-bearing granitoid rocks with minor phyllosilicate-rich layers are predominant along the Bathurst fault and show ambiguous sense of shear suggesting flattening by coaxial deformation. Quartz and feldspar microstructures show ductile deformation conditions ≥ 500°C. Along the main fault trace, the pervasive ductile flattening fabric is overprinted by brittle fractures, cataclasis, and hydrothermal alteration. In situ U-Th-Pb dating of syn-kinematic monazite suggests ductile fabric formation at ca. 1933 ± 4 Ma and 1895 ± 11 Ma, whereas zircon from a cross-cutting dyke constrains the brittle deformation to ≤ 1839 ± 14 Ma. 40Ar/39Ar analyses of fabric-defining minerals yield cooling ages of ca. 1920-1900 Ma and ca. 1900-1850 Ma for hornblende and muscovite, respectively, and a maximum cooling age of ca. 1840 Ma for biotite. The ductile flattening fabric developed between ca. 1933-1895 Ma, and is associated with the orthogonal collision and indentation of the Slave craton into the Thelon tectonic zone and Rae craton. Brittle deformation on the Bathurst fault was localized parallel to the ductile flattening fabric after ca. 1840 Ma and preceded Thelon basin deposition. Brittle deformation features in Bathurst fault rocks demonstrate fluid-rock interaction and enhanced basement permeability. Thus, the Bathurst fault is a possible conduit basement structure for unconformity-associated uranium mineralization.en_US
dc.language.isoenen_US
dc.relation.ispartofseriesCanadian thesesen
dc.rightsQueen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canadaen
dc.rightsProQuest PhD and Master's Theses International Dissemination Agreementen
dc.rightsIntellectual Property Guidelines at Queen's Universityen
dc.rightsCopying and Preserving Your Thesisen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectBathurst faulten_US
dc.subjectSlave cratonen_US
dc.subjectThelon tectonic zoneen_US
dc.subjectThelon basinen_US
dc.subjectmicrostructural analysisen_US
dc.subjectU-Th-Pb geochronologyen_US
dc.subject40Ar/39Ar thermochronologyen_US
dc.subjectunconformity-associated uranium mineralizationen_US
dc.subjectfault reactivationen_US
dc.subjectPrecambrian geologyen_US
dc.subjectbasement fault zonesen_US
dc.titleStructural style and timing of deformation on the Bathurst fault in the eastern Slave craton, western Nunavut, Canadaen_US
dc.typeThesisen
dc.description.degreeMaster of Scienceen_US
dc.contributor.supervisorKellett, Dawn A.
dc.contributor.supervisorGodin, Laurent
dc.contributor.departmentGeological Sciences and Geological Engineeringen_US


Files in this item

Thumbnail
Thumbnail
Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record