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TitleGeology of iron deposits in Canada: Iron deposits in the Appalachian and Grenville regions of Canada
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AuthorGross, G A
SourceGeological Survey of Canada, Economic Geology Report 22 vol. II, 1967, 111 pages (4 sheets), https://doi.org/10.4095/102456 (Open Access)
Year1967
Documentserial
Lang.English
MapsPublication contains 3 maps
Map Info.geological, 1:2,000,000
Map Info.geological, 1:506,800
Mediapaper; on-line; digital
RelatedThis publication is related to the following publications
File formatpdf
ProvinceNova Scotia; New Brunswick; Quebec; Ontario; Canada; Newfoundland and Labrador
NTS1M; 1N; 2D; 2E; 11E; 11F; 11J; 12B; 12H; 12P; 14D; 14E; 21A; 21B; 21E; 21G; 13K; 13N; 14L
AreaAppalachian; Grenville
Lat/Long WENS-94.3833 -52.1833 62.3500 41.6333
Subjectseconomic geology; metallic minerals; bog ore deposits; chemical analyses; iron; ore mineral genesis; phosphorus geochemistry; production; sulphur geochemistry; vanadium geochemistry; Acadian Group; Bell Island Group; Browns Mountain Group; Elliot Cove Group; Grenville Series; Logans Line; Mcadam Formation; Tetagouche Group; Torbrook Formation; Wabana Group
Illustrationscross-sections; stratigraphic sections; photographs; drillhole sections
Released1967 01 01; 2015 07 21
AbstractIron deposits in the Appalachian and Grenville regions were among the first mineral occurrences worked in Canada. Nearly every known type of iron occurrence is included in the 200 deposits described in this volume. The Clinton type ironformations, composed of hematite, siderite, and chamosite, at Wabana, Newfoundland, are the principal source of iron ore in the Appalachian region, and have been mined for over 70 years. Other Clinton type iron-formations in Nova Scotia and Algoma type iron-formations and iron-manganese beds in New Brunswick are potential sources of iron ore. Magnetite deposits of replacement origin and syngenetic ilmenite and titaniferous magnetite deposits are predominant in the Grenville region. The occurrence of a few small magnetite-hematite-quartz iron-formations in metasediments in the south part of the Grenville Province has been confirmed. A study of the regional distribution of all types of magnetite and ilmenite deposits in the Grenville Province, associated host rocks, mineralogy, and iron-titanium ratios in deposits shows that ilmenite deposits occur as injected and disseminated masses in anorthosite rocks, titaniferous-magnetite deposits occur as syngenetic bodies in gabbro and gabbroic anorthosites, and magnetite deposits containing less than one per cent Ti02 occur as replacement masses in metasediments, particularly in limestone and amphibole-rich host rocks. A close genetic relationship between anorthosite intrusions and related gabbro, diorite, and granitic intrusions on the one hand, and the ilmenite, titaniferous magnetite, and replacement magnetite deposits on the other is indicated by their spatial relationship and by the variations in iron and titanium ratios in the iron deposits with different host rocks. Iron-titanium ratios in ilmenite and magnetite deposits are lowest in the east and northeast part of the Grenville Province where very large anorthosite masses are exposed, and are highest in the southwest where only small gabbro and anorthositic gabbro intrusions are known and where replacement magnetite deposits are numerous.
GEOSCAN ID102456