Coffin, MF and Adams, N and Heckman, M and Ketter, T and Lucieer, VL and Neale, J and Reyes, AJ and Travers, AH and Whittaker, J, Deciphering Ontong Java Atoll, Nukumanu Atoll, and Kroenke Canyon, Western Equatorial Pacific final project report for RV Falkor FK141015 15 October - 3 November 2014, Institute for Marine and Antarctic Studies, University of Tasmania, FK141015 (2015) [Contract Report]
Of similar scale and relief to the Grand Canyon (Arizona, USA), and with multiple tributaries, Kroenke Canyon incises pelagic sediment, sedimentary rock, and igneous rock of OJP. We mapped the thalweg of Kroenke Canyon from approximately 150 km northeast of the atolls to its mouth at the transition between the OJP and the Nauru Basin (Figure ES1). Due to the loss of HROV Nereus several months prior to FK141015, seafloor sampling that had been planned for the voyage was not possible, and the Knudsen CHIRP 3260 sub-bottom profiling system did not yield any sub-bottom data that had planned to be acquired. Due to shipyard delays, the number of ship-days available for FK141015 was reduced from the original 30 to 20, and correspondingly the number of ship-days available for science in the survey area was reduced from the original 23 to 13.
Ultimate project goals for FK141015 include: 1) understanding and modeling how submarine canyons and atolls form and evolve on oceanic plateaus, isolated from terrestrial influences and subject to sea level fluctuations; 2) testing potential genetic relationships between a) the atolls and Kroenke Canyon, and b) the atolls and OJP; and 3) contributing to assessing tsunami risk on low-lying atolls. Intended impacts are to advance knowledge of canyon and submarine landslide development globally, to better understand emplacement and post-emplacement volcanism of LIPs, and to improve tsunami risk assessment.
|Item Type:||Contract Report|
|Keywords:||canyons, deep sea|
|Research Division:||Earth Sciences|
|Research Field:||Marine Geoscience|
|Objective Group:||Ecosystem Assessment and Management|
|Objective Field:||Ecosystem Assessment and Management of Marine Environments|
|UTAS Author:||Coffin, MF (Professor Mike Coffin)|
|UTAS Author:||Adams, N (Mr Nicholas Adams)|
|UTAS Author:||Lucieer, VL (Dr Vanessa Lucieer)|
|UTAS Author:||Travers, AH (Ms Amelia Travers)|
|UTAS Author:||Whittaker, J (Associate Professor Jo Whittaker)|
|Deposited By:||IMAS Research and Education Centre|
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