| Reference Type | Journal (article/letter/editorial) |
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| Title | Sr isotopic study of Helikian sediment and diabase dikes in the Athabasca Basin, northern Saskatchewan |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Armstrong, Richard Lee | Author |
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| Ramaekers, Paul | Author |
| Year | 1985 (March 1) | Volume | 22 |
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| Issue | 3 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e85-038Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 478591 | Long-form Identifier | mindat:1:5:478591:4 |
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| GUID | 0 |
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| Full Reference | Armstrong, Richard Lee, Ramaekers, Paul (1985) Sr isotopic study of Helikian sediment and diabase dikes in the Athabasca Basin, northern Saskatchewan. Canadian Journal of Earth Sciences, 22 (3) 399-407 doi:10.1139/e85-038 |
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| Plain Text | Armstrong, Richard Lee, Ramaekers, Paul (1985) Sr isotopic study of Helikian sediment and diabase dikes in the Athabasca Basin, northern Saskatchewan. Canadian Journal of Earth Sciences, 22 (3) 399-407 doi:10.1139/e85-038 |
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| In | (1985, March) Canadian Journal of Earth Sciences Vol. 22 (3) Canadian Science Publishing |
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| Abstract/Notes | The Athabasca Group overlies 1.8 Ga or older basement of the Churchill Province and predates uranium mineralization at 1.3 Ga. Cross-cutting diabase dikes have been dated by Rb–Sr mineral isochrons at 1.31 ± 0.07 Ga at Diabase Peninsula, Cree Lake, and 1.16 ± 0.04 Ga at Lazy Edward Bay, Cree Lake. Initial 87Sr/86Sr ratios for these dikes are 0.7040 ± 0.0005 and 0.7036 ± 0.002, respectively. Clastic sedimentary rocks of the Athabasca Group normally show limited variation in Rb/Sr and variable initial 87Sr/86Sr. Sedimentary rocks in two areas near the northern margin of the Athabasca Basin scatter about isochrons of 2.6 Ga, reflecting Archean provenance of detrital material and lack of Sr isotopic homogenization since deposition. Sediment of the tuffaceous Wolverine Point Formation, near Rumpel Lake, is much more variable in Rb/Sr and enriched in Rb relative to Sr and defines a 1.43 ± 0.03 Ga isochron with a 0.7057 ± 0.0005 initial ratio. This is possibly the age of deposition of the Athabasca Group. |
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