THREE NATURAL ZIRCON STANDARDS FOR U‐TH‐PB, LU‐HF, TRACE ELEMENT AND REE ANALYSES
Tóm tắt
We report here the results of a study to develop natural zircon geochemical standards for calibrating the U‐(Th)‐Pb geochronometer and Hf isotopic analyses. Additional data were also collected for the major, minor and trace element contents of the three selected sample sets. A total of five large zircon grains (masses between 0.5 and 238 g) were selected for this study, representing three different suites of zircons with ages of 1065 Ma, 2.5 Ma and 0.9 Ma. Geochemical laboratories can obtain these materials by contacting Geostandards Newsletter.
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Tài liệu tham khảo
Hewitt D.F., 1953, Geology of the Brudenell‐Raglan Area, 85
Mortensen J.K., 1992, Evidence for high levels of unsupported radiogenic 207Pb in zircon from a granitic pegmatite: implication for interpretations of discordant U‐Pb data, EOS, 73, 370
Mattinson J.M., 1973, Anomalous isotopic composition of lead in young zircons, 1972
Bauer M., 1896, Edelsteinkunde. Chr. Herm. Tauchnitz, 711
Ludwig K.R., 1991, Isoplot: a plotting and regression program for radiogenicisotope data, 39
Ryan C.G., 1990, Quantitative PIXE microanalysis in the geosciences, Nuclear Instrumental Methods, 47, 55
Govindraju K., 1989, 1989 compilation of working values and sample description on 272 geostandards, Geostandards Newsletter, 13, 1, 10.1111/j.1751-908X.1989.tb00476.x
J.I.KimandH.Stärk(1970).
Activation analysis of mercury in human urine samples, Radiochimica Acta, 13, 213
Allé P., 1992, New improvements in REE measurements in zircons by ion microprobe, 711
N.M.Evensen P.J.HamiltonandR.K.O'Nions(1978).
Rare‐earth abundances in chondritic meteorites, Geochimica et Cosmochimica Acta, 42, 1199