...J. K. Park Abstract A paleomagnetic study was conducted on a regionally extensive diabase sill intruding the upper part of the Helikian (?) Tsezotene Formation located in the Mackenzie Mountains Supergroup of northwestern Canada. Twelve sites, one from a lower sill at one locality, were sampled...

... the base of the Windermere Supergroup. Rb–Sr isochron dates of 766 ± 24 and 769 ± 27 Ma have been obtained for two of the these diabase sheets, which intruded the Tsezotene Formation of the Mackenzie Mountains Supergroup. The emplacement of the diabase sills and dikes may be related to either of two...

... to the dominantly clastic Late Proterozoic Tsezotene Formation and Katherine Group of the Mackenzie Mountains Supergroup. Tests of Carey's orocline hypothesis for the arc using linear regression and a plan-view application of the fold test suggest, in line with earlier structural studies, that the arc is largely...

..., whose probable primary pole lies at the beginning of the sequence, near the younger end of the Grenville Track (0.88 Ga). The end of the apparent polar wander (APW) sequence may be defined by a primary pole from sills intruding the Tsezotene Formation below the Katherine. We relate the sills, dated...

... a ) . The MMSG consists of ∼5 km of strata, representing both fluvial and marine environments. The poorly known H1 unit, a shallow-marine dolostone, is the lowest unit exposed. It is abruptly overlain by offshore mudstone and siltstone of the Tsezotene Formation, which passes conformably to cyclically packaged...

...Figure 6. Probability density diagrams and histograms for detrital zircon samples from Tsezotene Formation and Katherine Group sandstones of the Mackenzie basin. Age ranges of potential source regions are highlighted with colored bars. 207 Pb/ 206 Pb ages are plotted on x -axis only...

... the subsur- face distribution of the four lowest formations of the 'Mackenzie Mountains upergroup' (Fig. 2) in the area of interest (Fig. 1). In downward succession, they are Kather- ine Group, Tsezotene Formation, Map-unit H1 (of Aitken et a l . , 1982) and sub-H1 beds. The Katherine consists of grey...

...Table 4. Ar – Ar data for detrital muscovites from the Tsezotene Formation of the Mackenzie Mountains Supergroup (sample DT-95-11-1B; J f = 0.01944 ± 0.00019; Z4539; 64.8466°N, 133.1149°E). Laser power a Volume 39 Ar (×10 –11  cm 3 ) %Atm. 40 Ar...

... : U.S. Geological Survey Professional Paper 1252-E , 35 p. Park , J.K. , 1981 , Paleomagnetism of the Late Proterozoic sills in the Tsezotene Formation, Mackenzie Mountains, Northwest Territories, Canada : Canadian Journal of Earth Sciences , v. 18 p. 1572 - 1580 . Park , J.K...

..., Mackenzie Mountains, Northwest Territories, Canada . Can. J. Earth Sci. 21 , 371 – 375 . Park , J.K. , Aitken , J.D. , 1986 . Paleomagnetism of the late Proterozoic Tsezotene Formation of northwest Canada . J. Geophys. Res. 91 , 4955 – 4970...

... : Canadian Journal of Earth Sciences , v. 11 , p. 1012 – 1017 , https://doi.org/10.1139/e74-098 . Park , J.K. , 1981a , Paleomagnetism of the late Proterozoic sills in the Tsezotene Formation, Mackenzie Mountains, Northwest Territories, Canada : Canadian Journal of Earth Sciences , v. 18...

... large igneous province ( Ootes et al., 2008 ) and unpublished data. KV—Kikiktat volcanics, NV—Natkusiak volcanics, MHVC—Mount Harper volcanic complex, GB—Gunbarrel dikes, TS—Tsezotene sills, GA—Gairdner-Amata dikes, MW—Mundine Wells dikes, PC—Pleasant Creek volcanics. The ca. 720 Ma Kikiktat...