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TitleTill geochemical signatures of the Mount Pleasant Sn-W-Mo-Bi-In deposit, New Brunswick
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AuthorMcClenaghan, M B; Parkhill, M A; Pronk, A G; Boldon, G R; Pyne, R M; Rice, J M
SourceGeological Survey of Canada, Open File 7722, 2015, 44 pages, https://doi.org/10.4095/295614
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; xls
ProvinceNew Brunswick
NTS21G/07
AreaMount Pleasant
Lat/Long WENS-67.0000 -66.7833 45.5000 45.4167
Subjectssurficial geology/geomorphology; geochemistry; indicator elements; tills; till geochemistry; dispersal patterns; analytical methods; bedrock geology; mineral deposits; mineral occurrences; mineralization; tin; tungsten; molybdenum; bismuth; indium; grain size analyses; arsenic; lead; zinc; cadmium; silver; tellurium; glacial striations; Mount Pleasant deposit; indicator minerals; thallium; Devonian; Silurian; Quaternary
Illustrationslocation maps; tables; photographs; flow charts; ternary diagrams; plots
ProgramIntrusion/Porphyry Ore Systems, Targeted Geoscience Initiative (TGI-4)
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
Released2015 03 12
AbstractA till geochemistry study was carried out around the Mount Pleasant Sn-W-Mo-Bi-In deposit as part of the Geological Survey of Canada's (GSC) Targeted Geoscience Initiative 4 (TGI-4), a collaborative federal geoscience program with a mandate to provide industry with the next generation of geoscience knowledge and innovative techniques that will result in more effective targeting of buried mineral deposits. The <0.063 mm fraction of till clearly defines glacial dispersal at least 0.5 km down-ice of the North Zone and 1 km downice of the Fire Tower Zone. Indicator elements in till for this deposit include the main ore elements Sn, W, Mo, Bi and In. Pathfinder elements include Ag, As, Cd, Cu, Pd, Re, Te, Tl, and Zn. The Mount Pleasant deposit is a significant source of In and this study is one of the first to report a glacial dispersal pattern for In in till. Till overlying and just down-ice of the deposit contains between 1 and 13 ppm In, some of the highest In values ever reported for till. The study compared the efficiency of an aqua regia leach versus a lithium metaborate/tetraborate fusion followed by nitric acid digestion (total digestion) for determining metal contents in till. Results indicate that a total digestion is required to report the total concentration of Sn and W in till. On the other hand, aqua regia is suitable for determining the other indicator and pathfinder elements.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI-4) is a collaborative federal geoscience program that provides industry with the next generation of geoscience knowledge and innovative techniques to better detect buried mineral deposits, thereby reducing some of the risks of exploration. This Open File reports results for the Geological Survey of Canada's Targeted Geoscience Initiative 4 (TGI-4) study of to surficial geochemical signatures around the Mount Pleasant tin deposit, in west central New Brunswick. The report includes data and interpretations of till geochemistry around the deposit and highlights the pathfinder elements that will be useful for tin exploration in the region.
GEOSCAN ID295614