Data Trawler - Project details

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Project details

Title: Blythe Star Shipwreck Survey + Opportunistic Seafloor Mapping
Id: 2622
Investigator(s): Craig Davey
CSIRO National Collections and Marine Infrastructure [details]

Description: At the end of voyage IN2023_V02 if time and weather permits the CSIRO NCMI E&T GSM team will map the suspected shipwreck location of the Blythe Star that sank in 1973 in ~140m of water. 4-6 lines of multi-beam survey are earmarked at 6kts. Additionally, it’s planned that RVI will hold station and use the Drop Camera to get seafloor confirmation of the shipwreck location and condition. If confirmed, the shipwreck would later be reported via an existing MNF communication plan.

Further opportunistic mapping along our voyage track will be conducted in collaboration with the Voyage Manager, Chief Scientist and GSM teams onboard. This opportunity will only be realised if/when there is an opening in our schedule that does not impact voyage priorities.

Years: 2023
Hierachy: NCMI Engineering and Technology Geophysical Survey and Mapping

Publications

Online News

List of surveys that this project was on.

Use [details] link to view survey details (map, reports, metadata etc) including links to download data.

Survey InvestigatorDescription
IN2023_V02

[details]		 Martin Jutzeler (UTAS)

Offshore western Tasmania, a gigantic 450km3 submarine landslide shows as an abrupt headscarp failure. At our knowledge, this submarine landslide has never been examined in detail before, despite being a remarkably sharp morphology on bathymetric maps. This project investigates the geomorphology and biodiversity of this region with four research aims:

  1. To assess the morphology and internal structure of the submarine landslide to model transport and sedimentation processes of submarine landslides and associated mass flows.
  2. Unravel the causes of failure of this submarine landslide and calculate the tsunamigenic potential of similar shelf collapses around Australia. Based on quantitative data collect at sea, numerically model tsunami inundation and use this model as representative example for tsunami risk mitigation for coastal Australia.
  3. Map the offshore continuation of major fault zones and the highly mineralised Mount Read Volcanics to extend our understanding of the geology and tectonism of Tasmania. Map potential prospective resources on the shallow shelf.
  4. Increase the knowledge of seafloor habitat features and associated biodiversity within this region and understand the drivers of the spatial distribution of seafloor biodiversity and nutrients in relation to concentration of nutrients in water, ocean currents (including upwelling) and fine-scale geomorphological variations.
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