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TitleTemporal evolution and nature of Ti-Fe-P mineralization in the anorthosite-mangerite-charnockite-granite (AMCG) suites of the southcentral Grenville Province, Saguenay – Lac St. Jean area, Quebec, Canada
AuthorHébert, C; Cadieux, A -M; van Breemen, O
SourceThe Grenville Province: a geological and mineral resources perspective derived from government and academic research initiatives/La Province de Grenville : l'aspect des ressources géologiques et minérales découlant des initiatives de recherche gouvernementales et académiques; Canadian Journal of Earth Sciences vol. 42, no. 10, 2005 p. 1865-1880,
Alt SeriesGeological Survey of Canada, Contribution Series 2004062
Alt SeriesQuebec Department of Natural Resources, Wildlife and Parks, Contribution 04-5110-01
PublisherCanadian Science Publishing
Mediapaper; on-line; digital
File formatpdf
ProvinceQuebec; Ontario; New Brunswick
NTS11M; 11N; 11O; 11P; 12; 21E; 21G; 21H/04; 21H/05; 21H/06; 21H/10; 21H/11; 21H/12; 21H/13; 21H/14; 21H/15; 21H/16; 21I/01; 21I/02; 21I/03; 21I/04; 21I/05; 21I/06; 21I/07; 21I/10; 21I/11; 21I/12; 21I/13; 21I/14; 21I/15; 21J; 21L; 21M; 21N; 21O; 21P; 22; 31G; 31H; 31I; 31J; 31K; 31O; 31P; 32A; 32B; 32G; 32H; 32I; 32J; 32O; 32P
AreaSaguenay; Lac St. Jean; United States of America
Lat/Long WENS -76.0000 -56.0000 52.0000 45.0000
Subjectsgeneral geology; geochemistry; igneous and metamorphic petrology; regional geology; orogenic regions; anorthite; mangerites; charnockites; granites; magmatism; titanium geochemistry; iron geochemistry; labradorite; gneisses; plutonic rocks; shear zones; felsic rocks; tonalites; grenville orogeny
Illustrationslocation maps; geological sketch maps; tables; geochemical plots; photomicrographs
Released2005 10 01
AbstractIn the south-central Grenville Province, Quebec, Canada, anorthosite-mangerite-charnockite-granite (AMCG) magmatism took place during four distinct episodes between 1327 and 1008 Ma. AMCG rocks crosscut several gneiss complexes composed of ~1506 Ma supracrustal rocks and massive to gneissic igneous rocks that were emplaced during two distinct episodes: ~1434 and 1393-1383 Ma. The four episodes of AMCG magmatism are (i) the 1327 ± 16 Ma labradorite-type De La Blache Mafic Plutonic Suite, (ii) the 1160-1135 Ma labradorite- and andesine-type Lac St. Jean Anorthositic Suite, (iii) a 1082-1045 Ma unnamed plutonic suite, and (iv) the 1020-1008 Ma andesine-type Valin Anorthositic Suite. The Valin Anorthositic Suite includes the 1016 ± 2 Ma andesine-type Mattawa Anorthosite, the 1010-1008 Ma andesine-type Labrieville Alkalic Anorthositic Massif, the 1020 ± 4 Ma St. Ambroise Pluton, the 1018 +7/-3 Ma Farmer Monzonite; the 1010 ± 2 Ma Gouin Charnockite, and the 1010 ± 3 Ma La Hache Monzonite. Study of the Ti-Te-P mineral occurrences in these four AMCG units in the south-central Grenville Province has shown that (i) apatite-bearing rocks are related only to andesine-type anorthosites, (ii) titaniferous magnetite is restricted to labradorite-type anorthosites, and (iii) hemo-ilmenite occurs only in andesine-type anorthosite and associated oxide-apatite-rich gabbronorites (OAGN) and nelsonites.

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