Ion Microprobe U-Pb Dating Of Apatite

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Ion microprobe U-Pb dating of apatite - ScienceDirect
Ion microprobe U‐Pb dating and REE analyses of phosphates . . .
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(PDF) Ion micropobe U-Pb dating and REE analysis of . . .
Ion Microprobe U-Pb Dating and REE Analysis of Apatite . . .
Ion microprobe U-Th-Pb dating and REE analyses of . . .
Ion microprobe U‐Th‐Pb dating and REE analyses of . . .
Direct ion microprobe U-Pb dating of fossil tooth of a . . .
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It has been shown that the ion-microprobe is suitable for U-Pb dating of apatite from a preliminary study using the SHRIMP II instrument at Curtin University of Technology (Kennedy and Dante, 1997) . Although apatite is routinely and successfully dated by the IDTIMS (isotope dilution thermal ionization mass spectrometry) method, the possibility of in situ dating is important when the apatites must not be destroyed (very rare or needed for other analytical work) or their textural context is . . .
[1] U and Pb isotopes and rare earth elements (REEs) in individual phosphate grains from H4-chondrites, Y-74371 were measured by using an ion microprobe . Nine analyses of whitlockite (merrillite) and five analyses of apatites indicate a total Pb/U isochron age of 4533 ± 40 Ma (2 sigma), which are consistent with the results from previous using Thermal ionization mass spectrometer (TIMS) .
Ion microprobe U-Pb dating of apatite is applied to a fossil tooth of a Allosaurid derived from the Hasandong Forma- tion in the Gyeongsang basin, southeastern Korea . Twelve spots on a single . . .
Ion microprobe U-Pb dating of Type 1 apatite did not give a meaningful age, while Type 2 apatite yields a Tera-Wasserburg concordia intercept age of 3214 +/- 140 Ma (95 per cent confidence level . . .
Ion microprobe U-Pb dating of Type 1 apatite did not give a meaningful age, while Type 2 apatite yields a Tera-Wasserburg concordia intercept age of 3214 +/- 140 Ma (95 per cent confidence level, MSWD = 0 .6) in a three-dimensional 238U/206Pb-207Pb/206Pb-204Pb/206Pb diagram, and a 204Pb/206Pb-207Pb/206Pb isochron age of 3191 +/- 150 Ma (95 per cent confidence level, MSWD = 0 .5) .
resolution ion microprobe (SHRIMP) . Observed U-Pb data of 12 apatite grains from Yamato (Y-) 000593/000749 are well represented by linear regressions in both "conventional" 2D isochron plots and the 3D U-Pb plot (total Pb/U isochron), indicatin g that the formation age of th is meteorite is 1 .53 ± 0 .46 Ga (2 σ) .
Abstract— U , Th, and Pb isotopes and rare earth elements (REEs) in individual phosphate grains from martian meteorites Lafayette and Yamato‐000593/000749 were measured using a sensitive high‐resolution ion microprobe (SHRIMP) . Observed U‐Pb data of 12 apatite grains from Yamato (Y‐) 000593/000749 are well represented by linear regressions in both "conventional" 2D isochron plots and the 3D U‐Pb plot (total Pb/U isochron), indicating that the formation age of this meteorite is . . .
We report here the first results of direct ion microprobe U-Th- Pb dating of fossil tooth of a fresh-water shark using the SHRIMP instrument recently installed at Hiroshima University, Japan . Advantages of the ion probe method are to preserve the important textural context of the fossil and to provide an opportunity for other analytical work . 2 .
cently Sano et al . (1999) has established an ion-microprobe U-Pb dating method for apatite using the SHRIMP II (Sensitive High Resolution Ion MicroProbe ) instrument installed at Department of Earth and Planetary Sciences, Hiroshima Uni-versity in Japan . In contrast to zircon for which single spots on the sample yield corresponding
Ion microprobe U-Th- Pb ages of zircons from granulite facies lower crustal xenoliths from north Queensland, Australia . . . . [6,7]) . Although U-Pb dating of zircon can yield important information on initial crys- . . . where Ap = apatite . Amph = amphibole, Bio = biotite, Cpx = clinopyroxcne, . . .
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Ion Microprobe U-Pb Dating Of Apatite