| Title | Radiogenic age and isotopic studies: report 7 |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Geological Survey of Canada |
| Source | Geological Survey of Canada, Paper no. 93-2, 1993, 159 pages, https://doi.org/10.4095/193328  Open Access |
| Image |  |
| Year | 1993 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| Related | This publication contains the following
publications |
| File format | pdf |
| Province | New Brunswick; Ontario; Manitoba; Saskatchewan; Alberta; British Columbia; Yukon; Northwest Territories; Nunavut |
| NTS | 21P; 41I; 63K; 63L; 63M; 63N; 84; 83; 82P; 92K; 104; 105B; 75L; 76D; 58C |
| Lat/Long WENS | -136.0000 -64.0000 76.0000 46.0000 |
| Subjects | geochronology; isotopic studies; isotopes; uranium lead dates; zircon dates; argon argon dates; potassium argon dates; radiometric dates; Proterozoic; Tertiary; Jurassic; Cretaceous |
| Released | 1994 01 01; 2013 04 23 |
| Abstract | Granulite facies ortho- and paragneisses and felsic intrusive rocks form the crystalline core of the Boothia Uplift, which extends northward from Boothia Peninsula into the Arctic Archipelago. The rocks
dated come from northern Boothia Peninsula, western Somerset Island, and eastern Prince of Wales Island, between 71 °N and 74°N. Zircon ages of protoliths of orthogneissic rocks range from 2.48 to ca. 2.2 Ga. A major thermal event, involving syenitic
magmatism and high-grade metamorphism, occurred in the interval 1.94-1.92 Ga; magmatism may have preceded metamorphism by 1 0 or 20 Ma. A massive, porphyritic rapakivi granite in northern Somerset Island intruded 1 .71 Ga ago. Metamorphic and
intrusive ages in the 1.9-2.0 Ga range in the Boothia Uplift are similar to those in the Thelon Tectonic Zone on the mainland to the southwest. Compared with the Thelon zone, however, crystallization ages of gneissic protoliths are, in general, older
and the nature of the intrusive suite is significantly different in the Boothia Uplift. |
| GEOSCAN ID | 193328 |
|
|