| Title | Uranium-rich bostonite-carbonatite dykes in Nunavut: recent observations |
| 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; Jefferson, C W |
| Source | Geological Survey of Canada, Current Research (Online) no. 2011-11, 2011, 16 pages, https://doi.org/10.4095/288751  Open Access |
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| Year | 2011 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf (Adobe Acrobat Reader) |
| Province | Nunavut |
| NTS | 65E/13; 65E/14; 65E/15; 65E/16; 65J; 65K; 65L; 65M; 65N; 65O; 65P; 66A; 66B; 66C; 66F; 66G; 66H |
| Area | Kazan River; Deep Rose Lake |
| Lat/Long WENS | -104.0000 -96.0000 65.5000 61.7500 |
| Subjects | economic geology; mineralogy; geochemistry; mineral occurrences; mineral deposits; uranium; bostonites; carbonatites; dykes; thorium; igneous rocks; syenites; provenance; radioactivity; radioactive
boulders; petrography |
| Illustrations | location maps; photomicrographs; photographs; profiles; tables |
| Program | GEM: Geo-mapping for Energy and
Minerals Uranium |
| Released | 2011 08 12 |
| Abstract | Anomalously radioactive dykes near Deep Rose Lake (NTS 66 G/8) consist of potassic microsyenite (bostonite) with and without carbonate-rich portions. One dyke-like body consisting of carbonate alone (+
minor chlorite) was also found. Radiation measurements of up to 9000 counts per second (equivalent uranium (eU) = 519 ppm, equivalent thorium (eTh) = 34 ppm) in outcrop result from concentrations of uranium silicates, uranium-thorium oxides, and
monazite. One carbonate-rich dyke also contains a REE-bearing carbonate phase. The syenites are interpreted as coming from strongly differentiated ultrapotassic magma related to the Dubawnt minette suite (ca. 1.83 Ga), and the carbonate as a product
of further igneous differentiation (carbonatite). Anomalously radioactive and REE-rich bostonite dykes and small plutons related to the Dubawnt minettes are broadly distributed from latitude 60° to at least as far north as the Amer mylonite zone.
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| GEOSCAN ID | 288751 |
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