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TitleRadiogenic age and isotopic studies: report 3
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorGeological Survey of Canada
SourceGeological Survey of Canada, Paper no. 89-2, 1990, 191 pages, Open Access logo Open Access
Mediapaper; on-line; digital
RelatedThis publication contains the following publications
File formatpdf
ProvinceNew Brunswick; Ontario; Manitoba; Quebec; Yukon; Nunavut; Northwest Territories
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Subjectsgeochronology; igneous and metamorphic petrology; neodymium samarium dates; rubidium strontium dates; argon argon dates; uranium lead dates; zircon dates; geochronometry; radiometric dates; isotopic studies; isotope ratios; analyses; volcanic rocks; igneous rocks; granites; plutonic rocks; anorthosites; gabbros; basalts; metavolcanic rocks; mylonites; metamorphic rocks; baddeleyite; monazite; archean; Precambrian; Proterozoic; Quaternary; Silurian
Illustrationstables; charts; sketch maps; photomicrographs; Concordia diagrams; photographs
Released1990 09 01; 2013 08 28
AbstractChemical and mass spectrometry procedures for Rb-Sr and Sm-Nd isotopie analyses at the Geologi­cal Survey of Canada's geochronology laboratory are described. The chemistry is performed in a clean air environment and reagents are either redistilled or purchased as ultrapure products. Chemical proce­dures consist of weighing and total spiking of samples with 87Rb-84Sr or 149Sm-148Nd tracer solution; HF and HN01 dissolution, including high-pressure dissolution for Sm-Nd analyses; and two stages of ion exchange column chemistry. Mass spectrometry is carried out on a Finnigan-MAT 261 mass spec­trometer equipped with a variable multicollector. Sr, Nd and Sm, are analyzed in static multicollector mode, whereas Rb is analyzed in single-peak jumping mode.

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