More than 3000 individual detrital magnetite grains from a fanglomerate near Whitewater (California, USA) were scanned using microCT. These data were used to detect mineral inclusion in these magnetite grains, which can contribute significant amounts of 3He. Grains without inclusions were then picked from these analyzed grains and used to calibrate the cosmogenic 3He production rate in magnetite (manuscript submitted to GChron).
Florian Hofmann (California Institute of Technology)
March 15, 2021
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