Abstract

Four museum specimens of xenotime were tested for homogeneity in their U-Pb ages using isotope dilution - thermal-ionization mass spectrometry (ID-TIMS). The U-Pb ages of the samples ranged from about 500 Ma to 1020 Ma. Sample z6413, from a granitic pegmatite in the Grenville Province, yielded homogeneous 206Pb/238U and 207Pb/206Pb ages of 994 Ma and 997 Ma, respectively. This sample was selected as a primary candidate reference material for ion microprobe U-Pb geochronology. A second sample, z6410, yielded 206Pb/238U and 207Pb/206Pb ages of 897 Ma and 901 Ma, respectively, and is a potential secondary standard. The other samples displayed significant age heterogeneities, including the effects of Pb loss, making them unsuitable as standards.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.