Scientific drilling of sediments at Darwin Crater, Tasmania
Agathe Lise-Pronovost, Michael-Shawn Fletcher, Tom Mallett, Michela Mariani, Richard Lewis, Patricia S Gadd, Andy IR Herries, Maarten Blaauw, Hendrik Heijnis, Dominic A Hodgson, Joel B Pedro
SCIENTIFIC DRILLING | COPERNICUS GESELLSCHAFT MBH | Published : 2019
A 70m long continental sediment record was recovered at Darwin Crater in western Tasmania, Australia. The sediment succession includes a pre-lake silty sand deposit overlain by lacustrine silts that have accumulated in the ~ 816 ka meteorite impact crater. A total of 160m of overlapping sediment cores were drilled from three closely spaced holes. Here we report on the drilling operations at Darwin Crater and present the first results from petrophysical whole core logging, lithological core description, and multi-proxy pilot analysis of core end samples. The multi-proxy dataset includes spectrophotometry, grain size, natural gamma rays, paleoand rock magnetism, loss on ignition, and pollen an..View full abstract
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Awarded by Australian Research Council (ARC)
Awarded by ERC
Thanks to Max Harvey and Adam Debresteli for drilling operations and Bruce Maxwell for helicopter transport. Thanks to Malcolm Wallace and David Belton for fruitful discussions, Brad Dodrill from Lake Shore for performing FORC analysis, Rachael Fletcher for pollen sample preparation, and Chee Hoe Chuan for LOI analysis. This project is funded by the Australian Research Council (ARC) Discovery Indigenous project IN170100062 to Michael S. Fletcher and Agathe Lise-Pronovost. Agathe Lise-Pronovost is supported by a McKenzie Fellowship at the University of Melbourne and funding from La Trobe University's Deputy Vice Chancellor Research (DVCR). Tom Mallett is supported by a La Trobe University Postgraduate Research Scholarship. Joel B. Pedro acknowledges support from the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013) and ERC grant agreement no. 610055 (the ice2ice project).