Ootes, Luke, Jackson, Valerie A., Davis, William J., Bennett, Venessa, Smar, Leanne, Cousens, Brian L. (2017) Parentage of Archean basement within a Paleoproterozoic orogen and implications for on-craton diamond preservation: Slave craton and Wopmay orogen, northwest Canada. Canadian Journal of Earth Sciences, 54 (2) 203-232 doi:10.1139/cjes-2016-0059
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Parentage of Archean basement within a Paleoproterozoic orogen and implications for on-craton diamond preservation: Slave craton and Wopmay orogen, northwest Canada | ||
| Journal | Canadian Journal of Earth Sciences | ||
| Authors | Ootes, Luke | Author | |
| Jackson, Valerie A. | Author | ||
| Davis, William J. | Author | ||
| Bennett, Venessa | Author | ||
| Smar, Leanne | Author | ||
| Cousens, Brian L. | Author | ||
| Year | 2017 (February) | Volume | 54 |
| Issue | 2 | ||
| Publisher | Canadian Science Publishing | ||
| DOI | doi:10.1139/cjes-2016-0059Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 485330 | Long-form Identifier | mindat:1:5:485330:9 |
| GUID | 0 | ||
| Full Reference | Ootes, Luke, Jackson, Valerie A., Davis, William J., Bennett, Venessa, Smar, Leanne, Cousens, Brian L. (2017) Parentage of Archean basement within a Paleoproterozoic orogen and implications for on-craton diamond preservation: Slave craton and Wopmay orogen, northwest Canada. Canadian Journal of Earth Sciences, 54 (2) 203-232 doi:10.1139/cjes-2016-0059 | ||
| Plain Text | Ootes, Luke, Jackson, Valerie A., Davis, William J., Bennett, Venessa, Smar, Leanne, Cousens, Brian L. (2017) Parentage of Archean basement within a Paleoproterozoic orogen and implications for on-craton diamond preservation: Slave craton and Wopmay orogen, northwest Canada. Canadian Journal of Earth Sciences, 54 (2) 203-232 doi:10.1139/cjes-2016-0059 | ||
| In | (2017, February) Canadian Journal of Earth Sciences Vol. 54 (2) Canadian Science Publishing | ||
| Abstract/Notes | The Wopmay orogen is a Paleoproterozoic accretionary belt preserved to the west of the Archean Slave craton, northwest Canada. Reworked Archean crystalline basement occurs in the orogen, and new bedrock mapping, UâPb geochronology, and SmâNd isotopic data further substantiate a Slave craton parentage for this basement. Detrital zircon results from unconformably overlying Paleoproterozoic supracrustal rocks also support a Slave craton provenance. Rifting of the Slave margin began at ca. 2.02 Ga with a second rift phase constrained between ca. 1.92 and 1.89 Ga, resulting in thermal weakening of the Archean basement and allowing subsequent penetrative deformation during the Calderian orogeny (ca. 1.88â1.85 Ga). The boundary between the western Slave craton and the reworked Archean basement in the southern Wopmay orogen is interpreted as the rifted cratonic margin, which later acted as a rigid backstop during compressional deformation. Age-isotopic characteristics of plutonic phases track the extent and evolution of these processes that left penetratively deformed Archean basement, Paleoproterozoic cover, and plutons in the west, and ârigidâ Archean Slave craton to the east. Diamond-bearing kimberlite occurs across the central and eastern parts of the Slave craton, but kimberlite (diamond bearing or not) has not been documented west of âŒ114°W. It is proposed that while the crust of the western Slave craton escaped thermal weakening, the mantle did not and was moved out of the diamond stability field. The Paleoproterozoic extensionâconvergence cycle preserved in the Wopmay orogen provides a reasonable explanation as to why the western Slave craton appears to be diamond sterile. | ||
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