Dr Sarah Crowther, University of Manchester
Tuesday 18th November 1600h
Earth Sciences Seminar Room (Basement, WEB 05)
The I-Xe chronometer provides a high resolution means of studying events that occurred during the formation of the Solar System and the subsequent reprocessing of material within the first ~150 Ma of Solar System history. Barwell seems to have sampled igneous clasts that formed early in the Solar System's history, and preserved the I-Xe system from this time. These clasts are igneous in nature, rather than chondritic. If they are relics from a previous generation of melted, differentiated planetesimals, it would support data that suggest there was an earlier generation of planetesimals that pre-date the formation of the chondrite parent bodies. Barwell also allows us the opportunity to investigate whether chondrules from this early period of Solar System history are also present.
In this talk Sarah Crowther will discuss the background to this study, the I-Xe chronometer, the techniques and mass spectrometer used at The University of Manchester to determine I-Xe ages, and recent analyses of Barwell.
More information on attending seminars at http://www.nhm.ac.uk/research-curation/news-events/seminars/