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TitlePreliminary geochemical characterization of the Central Mineral Belt uranium geochemistry database
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AuthorAcosta-Góngora, P; Potter, E G
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 2; by Rogers, N (ed.); Geological Survey of Canada, Open File 8373, 2018 p. 57-63, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 2, Geological Survey of Canada, Open File 8373
File formatpdf
ProvinceNewfoundland and Labrador
NTS13E/15; 13E/16; 13F/13; 13F/14; 13F/15; 13F/16; 13G/13; 13G/14; 13G/15; 13J/02; 13J/03; 13J/04; 13J/05; 13J/06; 13J/07; 13J/10; 13J/11; 13J/12; 13J/13; 13J/14; 13J/15; 13K; 13L/01; 13L/02; 13L/07; 13L/08; 13L/09; 13L/10; 13L/15; 13L/16; 13M/01; 13M/02; 13M/07; 13M/08; 13M/09; 13M/10; 13N/01; 13N/02; 13N/03; 13N/04; 13N/05; 13N/06; 13N/07; 13N/08; 13N/09; 13N/10; 13N/11; 13N/12; 13O/02; 13O/03; 13O/04; 13O/05; 13O/06; 13O/07; 13O/10; 13O/11; 13O/12
AreaLabrador; Jacques Lake; Moran Lake; Anna Lake; Snegamook Lake; Kanairiktok River
Lat/Long WENS -62.7500 -58.9500 55.7500 53.8333
Subjectseconomic geology; geochemistry; mineral deposits; mineral occurrences; uranium; copper; molybdenum; vanadium; iron oxides; gold; base metals; ore mineral genesis; mineralization; alteration; statistical analyses; major element analyses; Archean; Central Mineral Belt; Central Mineral Belt Uranium Geochemistry Database (CMBUG); Nain Province; Moran Lake Group; Kanairiktok Intrusive Suite; Moran Lake Group; Post Hill Group; Ailik Group; Bruce River Group; ore systems approach; iron-oxide-copper-gold (IOCG) deposits; principal component analysis; databases; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; pie charts; plots; bar graphs
ProgramKnowledge Management Coordination, Targeted Geoscience Initiative (TGI-5)
ProgramUranium systems, Targeted Geoscience Initiative (TGI-5)
Released2018 03 01
AbstractPreliminary geochemical characterization of the U±Cu±Mo±V mineralization in the Central Mineral Belt (CMB) of Labrador is developed based on data compiled within the recently published Central Mineral Belt uranium geochemistry database. The highest uranium concentrations are found in the Jacques Lake (up to 11 weight % U) and Michel-in (up to 2 weight % U) areas, whereas copper and molybdenum concentrations are the highest in the Moran Lake (up to 1.6 weight % Cu) and Jacques (up to 1 weight % Mo) and Anna Lake (up to 0.3 weight % Mo) areas, respectively. Sodic alteration is the most common alkali alteration type in the CMB, with the emplacement of iron oxides mainly decoupled from potassium. Uranium-rich samples also plot within the 'least altered' field in the alteration type discriminant diagram. However, this might be an artefact of distinct alteration type overlaps, which may shift the major element composition of the mineralized rocks towards the least altered field. The lack of association of uranium and other base metals with alkali elements is further recognized by principal component analysis. However, additional statistical evaluation focused on the individual alteration types and categorized by the geographical areas within the CMB is necessary to better understand the mobility of uranium and base metal elements, along with their association with alteration facies.