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Gamelin Enderbite
Stratigraphic label: [ppro]gin
Map symbol: pPgin

First published: 29 January 2019
Last modified: 23 January 2024

 

 

 

  DISCLAIMER: This English version is translated from the original French. In case of any discrepancy, the French version shall prevail. 

Informal subdivision(s)
Numbering does not necessarily reflect the stratigraphic position.
 
None
 
Author:Lafrance et al., 2018
Age:Paleoproterozoic
Stratotype:None
Type area:Griffis Lake area (NTS sheet 23P04)
Geological province:Churchill Province
Geological subdivision:Baleine Lithotectonic Domain
Lithology:Enderbite
Category:Lithodemic
Rank:Lithodeme
Status:Formal
Use:Active

Background

The Gamelin Enderbite was recognized during the Ministère’s fieldwork in 2017 as part of a regional synthesis of Southeastern Churchill Province (Lafrance et al., 2018). It consists of three small orthopyroxene intrusions in the southern Baleine Lithotectonic Domain. Only one was observed in outcrops with the other two being interpreted from aeromagnetic maps by their strong magnetic anomalies. Taner (1964) had mapped this area as a complex of metamorphosed rocks and more recent intrusive rocks.

 

Description

The Gamelin Enderbite is brown with a lighter brownish beige alteration patina. It is magnetic, medium to coarse grained and massive. In places, enderbite is pegmatitic. The rock consists of ~5% ferromagnesian minerals (biotite and orthopyroxene) disseminated as fine crystals or in small centimetric clusters.

 

Thickness and distribution

The Gamelin Enderbite forms three restricted intrusions inside the Griffis Complex, in the southern Baleine Lithotectonic Domain (Lafrance et al., 2020). The size of these intrusions ranges from 1 to 8 km2, for a total area of 14 km2.

 

Dating

None.

Stratigraphic Relationship(s)

The Gamelin Enderbite intrudes into the Griffis Complex. Decimetric to decametric enclaves of gneiss and diorite of the Griffis Complex are present in enderbite.

Paleontology

Does not apply.

References

 

Publications available through SIGÉOM Examine

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., CHARETTE, B., 2020. Domaine lithotectonique de Baleine, sud-est de la Province de Churchill, Québec, Canada: synthèse de la géologie. MERN; BG 2020-07, 4 plans.

 

Other publications

TANER, W.F., 1964. Geology, Griffis Lake, New Quebec / Géologie, Griffis Lake, Nouveau Québec. Geological Survey of Canada, « A » Series Map 1121A, 1 sheet. https://doi.org/10.4095/107788

Suggested Citation

Ministère de l’Énergie et des Ressources naturelles (MERN). Gamelin Enderbite. Quebec Stratigraphic Lexicon. https://gq.mines.gouv.qc.ca/lexique-stratigraphique/province-de-churchill/enderbite-de-gamelin_en [accessed on Day Month Year].

Contributors

First publication

Benoit Charette, P.Geo., M.Sc. benoit.charette@mern.gouv.qc.ca (redaction)

Mehdi A. Guemache, P.Geo., Ph.D. (coordination); Pierre Lacoste, P.Geo., M.Sc. (critical review); Simon Auclair, P.Geo., M.Sc. (editing); Céline Dupuis, P.Geo., Ph.D. (English version); Nathalie Bouchard (HTML editing). 

Revision(s)

Isabelle Lafrance, P.Geo., M.Sc. isabelle.lafrance@mern.gouv.qc.ca (redaction; 06/08/2019)

Mehdi A. Guemache, P.Geo., Ph.D. (coordination); Simon Auclair, P.Geo., M.Sc. (editing); Céline Dupuis, P.Geo., Ph.D. (English version).

 

 

16 septembre 2020
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