University of Otago Geology Seminar
Paleoenvironment and sediment basins in Dusky Sound, New Zealand, characterised through seismic stratigraphy and sediment cores
Presented by Jack Beagley, University of Otago
Fjords are recognised hotspots for carbon accumulation and account for 11% of annual marine carbon burial. Tamatea/Dusky Sound in southwestern New Zealand is a ~40 km long fjord containing sub-basins functioning as carbon-rich sediment traps. The sediment stratigraphy and depositional histories of these basins are poorly constrained, limiting our ability to calculate carbon stocks and assess key carbon delivery processes. Multi-channel seismic data, multibeam bathymetry and downcore measurements from 5 piston cores have been synthesised to reveal insights into Tamatea/Dusky Sound including glacial history, carbon burial potential and sea level. From this work, two drill sites are suggested for obtaining long (>100 m) climate and environmental records from Tamatea/Dusky Sound.
This talk will take place in person in the Benson Common Room (Gn9, Geology Building) AND will be available live on Zoom at the following link: https://bit.ly/otagogeology.
Contact: matt.druce@otago.ac.nz