U-Pb isotope systematics of micro-zircon inclusions

U–Pb isotopic study of relict zircon inclusions recovered from Muong Nong-type tektites

Isotopic compositions of U and Pb were determined for relict zircon inclusions recovered from Muong Nong-type tektites from the Australasian and North American strewn fields. These inclusions are generally opaque white with granular textures, probably representing mechanical disaggregation and/or local melting and recrystallization. All zircons have strongly discordant U–Pb isotopic ratios and ...

U-Pb Zircon Ages and Pb Isotope Geochemistry of Gold Deposits in the Carolina Slate Belt of South Carolina

Oxygen Isotopic Composition and U-Pb Discordance in Zircon

We have investigated U-Pb discordance and oxygen isotopic composition of zircon using high– spatial resolution !O measurement by ion microprobe. !O in both concordant and discordant zircon grains provides an indication of the relationship between fluid interaction and discordance. Our results suggest that three characteristics of zircon are interrelated: (1) U-Pb systematics and concomitant age...

A scanning ion imaging investigation into the micron - scale U - Pb systematics in a 1 complex lunar zircon 2 3

12 Abstract 13 14 The full U-Pb isotopic systematics in a complex lunar zircon ‘Pomegranate’ 15 from lunar impact breccia 73235 have been investigated by the development of a 16 novel Secondary Ion Mass Spectrometry (SIMS) scanning ion imaging (SII) 17 technique. This technique offers at least a four-fold increase in analytical spatial 18 resolution over traditional SIMS analyses in zircon. Res...

U-Pb ISOTOPIC SYSTEMATICS OF EXPERIMENTALLY SHOCKED BADDELEYITE

Introduction: The age significance of isotope chro-nometers in shocked, but not totally molten, extrater-restrial materials is still a matter of debate [1–3]. Numerous isotopic data from different isotopic systems have been obtained for meteorites, but most meteorites with apparent shock ages do not show petrographic evidence of strong shock metamorphic overprint. Deutsh and Schärer [4] carried...