| Title | Geology, Tebesjuak Lake, Nunavut |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Peterson, T D; Scott, J M J; Lecheminant, A N; Chorlton, L B; D'Aoust, B M A |
| Source | Geological Survey of Canada, Canadian Geoscience Map 158, 2014, 1 sheet, https://doi.org/10.4095/293892  Open Access |
| Image |  |
| Year | 2014 |
| Publisher | Natural Resources Canada |
| Edition | prelim. |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | geological, structural, lithological, 1:250,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 14 (NAD83) |
| Media | on-line; digital |
| Related | This publication is related to Geology, Tebesjuak lake,
District of Keewatin |
| File format | readme
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| File format | pdf; shp; xml; xls; jpg; JPEG2000 |
| Province | Nunavut |
| NTS | 65O |
| Area | Wharton Lake; Tebesjuak Lake; Tulemalu Bay; Mallery Lake |
| Lat/Long WENS | -100.0000 -98.0000 64.0000 63.0000 |
| Subjects | stratigraphy; structural geology; geochronology; economic geology; bedrock geology; volcanic rocks; intrusive rocks; igneous rocks; rhyolites; tuffs; basalts; sedimentary rocks; conglomerates;
sandstones; rhyodacites; amphibolites; migmatites; granites; gneisses; metamorphic rocks; dykes; gabbros; Archean; structural features; folds; mineral occurrences; alteration; uranium lead dates; Dubawnt Supergroup; Barrensland Group; Thelon
Formation; Warton Group; Pitz Formation; Baker Lake Group; Kunwak Formation; Christopher Island Formation; Amer Group; Snow Island Suite; Marjorie Hills assemblage; Kivalliq igneous suite; Hudson intrusive suite; Precambrian; Proterozoic |
| Illustrations | location maps |
| Program | GEM: Geo-mapping for Energy and
Minerals Uranium |
| Released | 2014 05 28 |
| Abstract | The map area is underpinned by three Archean terranes from west to southeast: the Snow Island Suite of 2.6 Ga granite-rhyolite (AS), the Marjorie Hills assemblage of metasedimentary and granitoid gneiss
(AMH), and orthogneiss of the Chesterfield block (unit Agn). The AS-AMH boundary is the Wharton Lake fault system, initially a southwest-dipping detachment. The AMH-Agn boundary is the dextral extensional Tulemalu Fault. Brittle reactivations of
these faults localized sub-basins of the Baker Lake Group and hosted coeval intrusions of Martell Syenite (minette / ~1.83 Ga Hudson Granite mix). A Hudson Granite plug intrudes the AMH. Early gabbro/anorthosite (~1.77 Ga) of the Kivalliq igneous
suite was intruded by Nueltin granite, co-magmatic with bimodal Pitz Formation lavas and the ~1.75 Ga, 015° McRae Lake diabase dyke swarm and compositionally related 075° Thelon River dyke swarm. Cu-Pb veins and replacements formed near mafic centres
and Au-Ag-bearing quartz veins near felsic centres. |
| Summary | (Plain Language Summary, not published)
The Tebesjuak Lake map sheet (65O, 1:250,000 scale) is dominated by mafic and felsic volcanic and subvolcanic intrusive rocks of the Wharton Group and
Kivalliq igneous suite (ca. 1.75 Ga). These intruded/overlie dominantly quartofeldspathic Archean gneisses, overlain by early Proterozoic supracrustal rocks of the Amer Group (ca. 2.1 Ga) and potassic volcanic rocks of the Baker Lake Group (ca. 1.83
Ga). The sheet contains the type locality of the Pukiq Lake Formation (ca. 2.6 Ga) rhyodacite, extrusive equivalent of the Snow Island Suite. This digital map includes layers of geology, geochronology, mineral showings and structural data. Data
sources include the original Open File 728 (LeCheminant, 1981), new data from the Northern Uranium Canada project, Geo-Mapping for Energy and Minerals, and published papers, reports, and theses from various universities and exploration
companies. |
| GEOSCAN ID | 293892 |
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