| Title | Radiogenic Age and Isotopic Studies: Report 1 |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Geological Survey of Canada |
| Source | Geological Survey of Canada, Paper no. 87-2, 1987, 212 pages, https://doi.org/10.4095/122737  Open Access |
| Image |  |
| Year | 1987 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| Related | This publication contains the following
publications |
| File format | pdf |
| Province | British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut; Canada |
| NTS | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Subjects | geochronology; radiometric dates; isotopic studies |
| Released | 1988 04 01; 2013 10 25 |
| Abstract | Analytical procedures for V-Pb isotope dilution analyses at the Geological Survey of Canada geochronology laboratory are described in detail. The procedures apply to zircon, monazite, sphene, rutile,
baddeleyite, thorite, apatite, allanite, and gamet. Zircon in particular is carefully selected and generally air abraded, and is characterized using polishing and etching techniques. Reagent preparation and chemical processing are done in a clean
air laboratory. Samples are spiked with a mixed 205Pb-233V-235V tracer, dissolved using steel jacketed Teflon pressure vessels or TeflonTM screw cap containers. U and Pb are separated using anion exchange resin columns. Blanks for typical sample
amounts of O. 01 to 1. 0mg are less than J0pg V and 6-40pg Pb. Rapid JO minute mass analysis of the V and Pb are carried out using a Finnigan MAT 261 variable multicollector mass spectrometer solely in the static mode. Data reduction incorporates
consideration of all sources of error in the analysis, and discordant V-Pb results are assessed on concordia plots using published regression techniques, taking into consideration the particular mineral systematics. |
| GEOSCAN ID | 122737 |
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