Sealers Bay Submarine Fan Complex, Oligocene, Southern New Zealand

  1. Dorrik A. V. Stow
  1. Robert M. Carter and
  2. Jon K. Lindqvist

Published Online: 29 APR 2009

DOI: 10.1002/9781444304473.ch37

Deep-Water Turbidite Systems

Deep-Water Turbidite Systems

How to Cite

Carter, R. M. and Lindqvist, J. K. (2009) Sealers Bay Submarine Fan Complex, Oligocene, Southern New Zealand, in Deep-Water Turbidite Systems (ed D. A. V. Stow), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304473.ch37

Editor Information

  1. Department of Geology, University of Southampton, UK

Author Information

  1. Department of Geology, University of Otago, Dunedin, New Zealand

Publication History

  1. Published Online: 29 APR 2009
  2. Published Print: 11 NOV 1991

ISBN Information

Print ISBN: 9780632032624

Online ISBN: 9781444304473

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Keywords:

  • Oligocene Balleny Group of Chalky Island;
  • Balleny Group;
  • subaqueous debris-flows;
  • Sealers Bay;
  • fossil proximal fan-channel

Summary

The Oligocene Balleny Group of Chalky Island, southwestern Fiordland, comprises a typical continental margin sequence 900 m in thickness. Thin nearshore traction deposited sediments at the base are overlain by submarine canyon and fan lithofacies that were deposited by the full range of subaqueous mass-transport processes. A steep-walled channel within Balleny Group is interpreted as a fossil proximal fan-channel. The sedimentary fill of the channel is texturally similar to sediments moving by slump-creep in Recent submarine canyons and fan-valleys. The field data presented indicate (1) that a small canyon complex at Sealers Bay was initially cut by subaqueous debris-flows derived from an adjacent cliffed continental coast; (2) that transport within the upper parts of the canyon and fan-channel complex was primarily by inertia-flow and slump-creep; and (3) that these more proximal types of mass-transport gave way gradationally and successively to fluxoturbidity and turbidity currents at locations further down-slope, with consequent deposition of sediment in more distal fan-channel and fan-surface environments as fluxoturbidites and turbidites, with lesser contributions from inertia-flows.