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

First published: 29 January 2019
Last modified: 6 August 2019

 

 

 

  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
Related unit(s)

None

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., in preparation). 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

Author(s) Title Year of Publication Hyperlink (EXAMINE or Other)
LAFRANCE, I. – VANIER, M.-A. – CHARETTE, B.  Domaine lithotectonique de Baleine, sud-est de la Province de Churchill, Nunavik, Québec, Canada : synthèse de la géologie. Ministère de l’Énergie et des Ressources naturelles, Québec. In preparation Bulletin géologiQUE
LAFRANCE, I. – CHARETTE, B. –  VANIER, M.-A. Sud-est de la Province de Churchill, Nunavik, Québec, Canada : synthèse de la géologie. Ministère de l’Énergie et des Ressources naturelles, Québec. 2018 Preliminary BG
TANER, W.F. Géologie – Lac Griffis, Territoire-du-Nouveau-Québec. Commission géologique du Canada; carte 1121A. 1964 Source

 

16 septembre 2020