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AAPG Asia Pacific Presents Dr. Lorna J Strachan, University of Auckland, New Zealand
A 60-90 minute talk entitled "Understanding Contemporary Sedimentary Processes of the Deep-marine Hikurangi Channel, New Zealand: A Modern Analogue for Sub-surface Convergent". Talks are free of charge. Talk Summary: "Off the east coast of New Zealand lies one of Earth’s longest and most enigmatic deep-sea channels, the colossal c.2000 km long Hikurangi Channel. Unlike submarine channels of a similar size, it is located along the convergent Hikurangi Subduction Margin. The Kaikōura Mw 7.8 2016 earthquake, revealed significant sediment flushing of multiple canyons and generation of a co-seismic turbidity current. Here I will use shallow sediment cores from the Hikurangi Channel to demonstrate a staggering array of Holocene gravity flow processes. I will highlight longitudinal and lateral deposit variability for 600 km that reveals insights into turbidity current flow structure, and vertical and longitudinal stratification. These observations will be placed in a temporal context using 14C radiocarbon and tephra-stratigraphy ages. These results will provide a useful insight into the spatial variability of an active channel system that can be easily translated to subsurface analogues.".

Feb 4, 2021 11:00 AM in Singapore

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