Where do zircons come from and what can large data sets of detrital zircon ages tell us about crustal growth?

The ages of detrital zircons from sandstones and rivers are used (and abused) to determine “provenance”.  This talk will be an overview of the progress of this science in the past 25 years in order to explore what we can and cannot learn from such studies.  We will start with an exploration of where zircons are created and therefore what we can learn by sampling them. Further we will delve into what we can see coupling a suite of trace element analyses to those zircon U-Pb ages from a worldwide database of zircons sampled from 38 major rivers.

Dr Charlotte Allen

Charlotte came to Australia in 1991 to take up a post-doc at ANU.  She was educated at Princeton University, University of Oregon and Virginia Tech, all in earth sciences.  She studied granites in the Klamath Mts and in the Mojave Desert, both in California.  She worked at the USGS in Menlo Park, and taught at the University of Kentucky before moving to Canberra. Her main interests are heavy isotope geochemistry and geochronology especially as applied to granites.  She ran the LA-ICPMS lab at ANU until 2013 when she moved to QUT to take up a Senior Research Officer position in the Central Analytical Research Facility in the Institute for Future Environments.




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