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      Rapid progradation of the Pliocene-Pleistocene continental margin, northern Taranaki Basin, New Zealand, and implications

      Hansen, Rochelle J.; Kamp, Peter J.J.
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      Hansen+Kamp_2004_Progradation.pdf
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       www.crownminerals.govt.nz
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      Hansen, R. J. & Kamp, P. J. J. (2004). Rapid progradation of the Pliocene-Pleistocene continental margin, northern Taranaki Basin, New Zealand, and implications. In Proceedings of New Zealand Petroleum Conference 2004, 7-10 March, Crown Minerals, Ministry of Economic Development, Wellington.
      Permanent Research Commons link: https://hdl.handle.net/10289/3610
      Abstract
      Progradation and aggradation of the modern continental margin in northern Taranaki Basin has resulted in the deposition of a thick and rapidly accumulated Pliocene-Pleistocene sedimentary succession. It includes the predominantly muddy Giant Foresets Formation, and the underlying sandy Mangaa Formation. Investigation of the internal attributes and depositional systems associated with the Giant Foresets Formation suggests that it would provide very little effective reservoir for hydrocarbon accumulations, although it does provide essential seal and overburden properties. While the sand-dominated Mangaa Formation could be a hydrocarbon reservoir, drilling so far has yet to reveal any significant hydrocarbon shows. Undoubtedly the most significant contribution that the Giant Foresets and Mangaa Formations have had on petroleum systems in northern Taranaki Basin is the cumulative effect that rapid and substantial accumulation has had on maturation and migration of hydrocarbons in the underlying formations.

      Palinspastic restoration of a seismic reflection profile across the Northern Graben, together with isopach mapping of stratigraphic section for biostratigraphic stages, indicates that the thickest part of the Pliocene-Pleistocene succession is along the central axis of the Northern Graben. Deposition of this succession contributed substantially to subsidence within the graben, providing further accommodation for sediment accumulation. Isopach and structure contour maps also reveal the extent to which submarine volcanic massifs were exposed along the axis of the graben and the timing of movement on major faults.
      Date
      2004
      Type
      Conference Contribution
      Publisher
      Ministry of Economic Development
      Rights
      This article has been published in Proceedings of New Zealand Petroleum Conference 2004, 7-10 March. © 2004 Hansen, R. J. & P. J. J. Kamp.
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