ABANDONED UNIT
Publication: 11 December 2020
DISCLAIMER: This English version is translated from the original French. In case of any discrepancy, the French version shall prevail.
| Author(s): | Girard et.al., 1989 |
| Age: | Paleoproterozoic |
| Stratotype: | None |
| Type area: | Central part of the Rivière-Koksoak town |
| Geological province: | Churchill Province |
| Geological subdivision: | Rachel-Laporte Lithotectonic Domain |
| Lithology: | Metagreywacke, shale, phyllite, schist, metaconglomerate, tectonic breccia, amphibolite, iron formation, metatuff and chert |
| Category: | Lithostratigraphic |
| Rank: | Formation |
| Status: | Formal |
| Use: | Abandoned |
Background
The Deborah Formation was defined by Girard (1995) in sheet 23P05. It was extended into the NW corner of sheet 23P03 by Hammouche et al. (2011) and extrapolated northwards by Henrique-Pinto et al. (2017, 2019). The unit was abandoned by Lafrance and Vanier (2021) as part of the Southeastern Churchill Province synthesis (Lafrance et al., 2018).
| Revised Units | Abandonned Units | Reference(s) |
| pPfru1b | pPdeb2; Deborah Formation – S3T(M10) and S3T(M25) | Hammouche et al., 2011; Girard, 1995 |
| pPfru3b | Deborah Formation – M14 | Girard, 1995 |
| pPfru4b | Deborah Formation – S9E | Girard, 1995 |
| pPkle1a | Deborah Formation – M16 | Girard, 1995 |
| pPkle1b | Deborah Formation – V3(M16)[TU]pPkle3 | Girard, 1995 |
| pPkle3 | Deborah Formation | Girard, 1995 |
Reasons for Abandonment
Girard (1995) included a wide range of lithologies in the Deborah Formation, which was subsequently divided into several units in a subsequent compilation. In their synthesis, Lafrance and Vanier (2021) abandoned this unit and reassigned metasedimentary rocks to the Freneuse Suite, the majority of which correspond to unit pPfru1b. Amphibolite, metatuff and gabbro units of the Deborah Formation have been included in units pPkle1a, pPkle1b and pPkle3 of the Klein Suite, respectively.
References
Publications Available Through SIGÉOM Examine
GIRARD, R., 1995. Géologie de la région du lac Deborah, Territoire-du-Nouveau-Québec. MRN; MB 95-20, 186 pages et 3 plans.
HAMMOUCHE, H., LEGOUIX, C., GOUTIER, J., DION, C., PETRELLA, L. 2011. Géologie de la région du lac Bonaventure. MRNF; RG 2011-03, 37 pages et 1 plan.
LAFRANCE, I., CHARETTE, B., VANIER, M.-A., 2018. Sud-est de la Province de Churchill, Nunavik, Québec, Canada: synthèse de la géologie. MERN; BG 2018-12
LAFRANCE, I., VANIER, M.-A., 2021. Domaine lithotectonique de Rachel-Laporte, sud-est de la Province de Churchill, Nunavik, Québec, Canada: synthèse de la géologie. MERN; BG 2021-01, 2 plans.
Other Publications
HENRIQUE-PINTO, R., GUILMETTE, C., BILODEAU, C., McNICOLL, V., 2017. Evidence for transition from a continental forearc to a collisional pro-foreland basin in the eastern Trans-Hudson Orogen: Detrital zircon provenance analysis in the Labrador Trough, Canada. Precambrian Research, volume 296, pages 181-194. doi.org/10.1016/j.precamres.2017.04.035
HENRIQUE-PINTO, R., GUILMETTE, C., BILODEAU, C., STEVENSON, R., CARVALHO, B.B., 2019. Petrography, geochemistry, and Nd isotope systematics of metaconglomerates and matrix-rich metasedimentary rocks: implications for the provenance and tectonic setting of the Labrador Trough, Canada. Canadian Journal of Earth Sciences, volume 56, pages 672-687. doi.org/10.1139/cjes-2018-0187
Suggested Citation
Ministère de l’Énergie et des Ressources naturelles (MERN). Deborah Formation (abandoned). Quebec Stratigraphic Lexicon. https://gq.mines.gouv.qc.ca/lexique-stratigraphique/province-de-churchill/formation-de-deborah_en [accessed on Day Month Year].
Contributors
|
First publication |
Isabelle Lafrance, P. Geo., M.Sc. isabelle.lafrance@mern.gouv.qc.ca (redaction) Mehdi A. Guemache, P. Geo., Ph.D. (coordination); Marc-Antoine Vanier, Jr. Eng., M.Sc. (critical review); Simon Auclair, P. Geo., M.Sc. (editing); Céline Dupuis, P. Geo., Ph.D. (English version); André Tremblay (HTML editing). |