Extracting 10Be and 9Be from Antarctic marine sediments – a comparison of different extraction techniques

Mr Matthew Jeromson1, Dr. Toshiyuki Fujioka2, Dr. David Fink3, Dr. Alix Post4, Ms. Krista Simon3, Dr. José Tonatiuh Sánchez-Palacios5, Mr. Marcello Blaxell1, Dr. T Gabriel Enge6, Dr. Klaus Wilcken3, Dr. Duanne White1

1University Of Canberra, , Australia, 2Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Borgus, Spain, 3Australian Nuclear Science and Technology Organisation, Sydney, Australia, 4Geoscience Australia, Canberra, Australia, 5Murdoch University, Perth, Australia, 6Research School of Earth Sciences, Australia National University, Canberra, Australia

Quality assurance and control (QA/QC) are sacrosanct for accelerator mass spectrometry (AMS) sample preparation laboratories. However, quantitative data necessary to assess QA/QC is rarely published for cosmogenic nuclide sample preparation laboratories around the world. Here, we compile and report QA/QC data for the first 5 years of Be-10 sample preparation operations in the CosmIC laboratory at Imperial College London, United Kingdom. Our QA/QC data include: 1) inductively coupled plasma – optical emission spectroscopy (ICP-OES) assay data for mineral purity, carrier concentration, beryllium yield, and beryllium purity; 2) AMS data for ion beam current, carrier blanks, laboratory process blanks, and measured isotope ratio versus precision; and 3) nuclide concentration data for replicate samples. These results serve to verify and benchmark our current Be-10 sample preparation methods and data quality. In turn, our QA/QC data set the bar for future development and improvements in the CosmIC laboratory and other cosmogenic isotope sample preparation laboratories globally.


Biography:

Dylan Rood is a leader in the application of cosmogenic isotopes and accelerator mass spectrometry (AMS) to studies in the Earth sciences, specifically as applied to Earth surface processes, active tectonics, climate change, and earthquake hazards. He is currently a Senior Lecturer in Earth Science at Imperial College London (UK) where he is the Director of the CosmIC Laboratory.

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Date

Nov 17 2021

Time

WEDNESDAY
1:00 pm - 1:25 pm