| Title | Revisiting Mesoproterozoic magmatism in Labrador: evaluating AMGC and Peralkaline magmatism |
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| Author | Hinchey, A M; Diekrup, D; Rayner, N |
| Source | Newfoundland and Labrador Department of Industry, Energy and Technology, Geological Survey, Current Research 23-1, (2023), 2023 p. 1-16  Open Access |
| Links | Online - En ligne
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| Image |  |
| Year | 2023 |
| Alt Series | Natural Resources Canada, Contribution Series 20220448 |
| Publisher | Geological Survey of Newfoundland and Labrador |
| Document | serial |
| Lang. | English |
| Media | paper; digital; on-line |
| File format | pdf |
| Province | Quebec; Newfoundland and Labrador |
| NTS | 2; 3; 4; 12; 13; 14; 15; 22; 23; 24; 25 |
| Lat/Long WENS | -68.0000 -53.0000 61.0000 51.0000 |
| Lat/Long WENS | -48.0000 -44.0000 62.0000 60.0000 |
| Subjects | Science and Technology; general geology; magmatism; Proterozoic; Mesozoic |
| Illustrations | location maps; photographs |
| Program | GEM-GeoNorth: Geo-mapping for Energy and Minerals GEM Program Coordination |
| Released | 2023 03 11 |
| Abstract | Research this past summer (2022) marked the continuation of a collaborative program between the Geological Survey of Canada-Geological Survey of Newfoundland and Labrador-Nunatsiavut Government. The
program is aimed at upgrading the geoscientific knowledge of and stimulating mineral exploration in, the Saglek to Makkovik region of Labrador. This project is supported by the GEM- GeoNorth program at Natural Resources, Canada, and the Geological
Survey of Newfoundland and Labrador. The objectives of the GEM-GeoNorth program are to assist in completing surveys of regional-scale geological maps across Canada's north and to enhance the geological knowledge of key areas of the Canadian Shield.
The GEM- GeoNorth project addresses the latter objective by targeting specific areas in the Nain and Makkovik provinces. In the study area, voluminous AMCG (anorthosite-mangerite-charnockite-granite) plutonic suites intrude along the boundary of the
Archean North Atlantic Craton (Hopedale Block) and Archean to Paleoproterozoic Churchill Province. Part of AMGC suites in Labrador, comprise the Nain Plutonic Suite (Sango Bay pluton, the Flowers Bay pluton and the Merrifield Bay pluton in the
research area) and are the focus of detailed mapping coupled with sampling for petrographic analysis, lithochemistry, isotopic and geochronological studies. In addition, detailed mapping and sampling were carried out on the Flowers River Igneous
Suite which comprises a younger, peralkaline, intrusive suite. The aim is to test whether the geophysical highs surrounding the Flowers River Igneous Suite reflect variations in the lithologies and/or plutonic suites in the region. AMCG plutonic
suites in the study area have the potential for Ni-Cu-PGE mineralization. These plutonic suites are the same age and part of the same suite that hosts the Voisey Bay Ni-Cu-Co deposit. |
| Summary | (Plain Language Summary, not published)
This report summarizes field work carried out in northern Labrador in the summer of 2022 to address knowledge gaps in our understanding of the evolution
of 1.3 billion year old granites in and related rocks in the field area. Similar rockst further to the north contain economic deposits of nickel, copper and cobalt. The rock units observed in the field are described in this report and these have been
extensively sampled for textural, geochemical and age studies to constrain these magmatic events. Results from these further studies will be reported in subsequent reports. |
| GEOSCAN ID | 331269 |
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