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TitleTill geochemical signatures of the Halfmile Lake Zn-Pb-Cu volcanogenic massive sulphide deposit, Bathurst Mining Camp, New Brunswick
AuthorBudulan, G; McClenaghan, M B; Parkhill, M A; Layton-Matthews, D; Pyne, M
SourceGeological Survey of Canada, Open File 7174, 2013, 122 pages, (Open Access)
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatreadme
File formatrtf; pdf; xls
ProvinceNew Brunswick
AreaHalfmile Lake
Lat/Long WENS-66.3500 -66.3000 47.3333 47.3000
Subjectssurficial geology/geomorphology; economic geology; geochemistry; glacial deposits; tills; till geochemistry; till deposits; indicator elements; drift prospecting; dispersal patterns; sediment dispersal; mineralization; zinc; copper; lead; gold; silver; arsenic; bismuth; antimony; mercury; selenium; tin; cadmium; gallium; sulphur; barium; volcanogenic deposits; sulphide deposits; exploration methods; ice flow; Bathurst Mining Camp; indicator minerals; Cenozoic; Quaternary
Illustrationslocation maps; photographs; tables; cross-sections
ProgramTargeted Geoscience Initiative (TGI-3), 2005-2010, Deep Search TGI-3
ProgramTargeted Geoscience Initiative (TGI-4), Volcanogenic Massive Sulfide Ore Systems
Released2013 04 23
AbstractThe Halfmile Lake study was conducted as part of the Geological Survey of Canada's Targeted Geoscience Initiative (TGI-3) Program under the Deep Search Project to document the geochemical and indicator mineral signatures of the till around the Halfmile Lake Zn-Pb-Cu volcanogenic massive sulphide (VMS) deposit in northcentral New Brunswick. Bedrock and till samples were collected in 2007 and 2008 at varying distances up- and down-ice of the deposit. Sampling was focused on the South Upper AB zone because it is the surface expression of the deposit and is capped by a preglacial gossan. Mineralization consists of a Curich stringer zone stratigraphically overlain (structurally underlain) by a Pb-Zn massive sulphide zone. A metal-rich gossan composed of secondary minerals is found at surface. Till in the Halfmile Lake deposit study area is thin (<2 m), light olive brown to dark brown in colour, and silty sand to sandy silt in texture. Ice flow across the deposit area was towards the east-northeast. The pathfinder elements in the <0.063 mm fraction of till that define the signature of the deposit include Cu, Pb, Zn, Ag, As, Au, Bi, Hg, Sb, Se, and Sn. Elevated concentrations of these elements in till down-ice are consistent with the ore mineralogy of the Halfmile Lake deposit and demonstrate that till geochemistry is a useful tool for detecting VMS mineralization in the glaciated terrain of the Bathurst Mining Camp.