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TitleMetallogenic studies of Pb-Zn-Ba occurrences in the Lower and Middle Paleozoic Sedimentary Rocks of the Lower St - Lawrence and northern Gaspesie area, Quebec, Part I
AuthorSchrijver, K
SourceGeological Survey of Canada, Open File 1495, 1987, 192 pages (1 sheet), (Open Access)
Documentopen file
MapsPublication contains 1 map
Map Info.location, mineralization, 1:500,000
Mediapaper; on-line; digital
File formatpdf
NTS22A; 22B; 22C/01; 22C/02; 22C/03; 22C/07; 22C/08; 22C/09; 22G/01; 22G/02; 22H/01; 22H/02; 22H/03; 22H/04; 22H/05; 22H/06; 22H/07; 22H/08; 21N/04; 21N/05; 21N/06; 21N/07; 21N/10; 21N/11; 21N/12; 21N/13; 21N/14; 21N/15
AreaGaspe Peninsula
Lat/Long WENS -70.0000 -64.0000 49.5000 47.0000
Subjectsmetallic minerals; mineralogy; stratigraphy; mineralization; mineral occurrences; sulphides; galena; sphalerite; vein deposits; sedimentary rocks; barite; carbonates; thin section microscopy; stratigraphic correlations; gangue minerals; textural analyses; chalcopyrite; fluid inclusions; pyrite; arsenopyrite; Paleozoic
Geological Survey of Canada (Atlantic)
Natural Resources Canada Library - Ottawa (Earth Sciences)
Natural Resources Canada library - Vancouver (Earth Sciences)
Natural Resources Canada library - Calgary (Earth Sciences)
Released1987 09 01; 2008 04 07; 2018 07 03
AbstractGalena and/or sphalerite are the dominant sulfides in ten essentially vein-, fracture- and vug-bound mineral occurrences in the Paleozoic sedimentary sequence of the Lower St-Lawrence and northern Gaspesie area. Dominant gangue minerals are barite in two occurrences, quartz in two others, and carbonates (mainly calcite) in the remainder. Three are accompanied by traces of disseminated galena. Field study and microscopy of these diverse occurrences show that they are post kinematic with respect to the latest brittle-deformation history of their diverse host rocks. Well defined veins are commonly characterized by a preferred distribution of their sulfide load near the selvedges, especially so where the gangue minerals show a comb-textured pattern of growth. Galena-sphalerite inclusion-enclosure relations show no generally valid paragenetic sequence of these two minerals. The absence of zoning in sphalerite is inferred to be evidence for a unique and short-lived event of sulfide-mineralization in the filling of the vein(s) constituting an occurrence.