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dc.contributor.authorBland, Kyle J.
dc.contributor.authorKamp, Peter J.J.
dc.coverage.spatialConference held at New Zealanden_NZ
dc.date.accessioned2010-02-11T02:13:30Z
dc.date.available2010-02-11T02:13:30Z
dc.date.issued2006
dc.identifier.citationBland, K. J. & Kamp, P. J. J. (2006). Geological structure of the forearc basin in central Hawke’s Bay, eastern North Island. In Proceedings of New Zealand Petroleum Conference 2006, 6 – 10 March 2006.en
dc.identifier.urihttps://hdl.handle.net/10289/3563
dc.description.abstractCentral Hawke’s Bay lies within an extensive forearc basin in eastern North Island that developed during the Late Miocene to Pleistocene. The onshore structural elements of Hawke’s Bay can be classified into four structural domains, each reflecting differing styles and scales of deformation. These domains are from west to east, the axial range domain, the range front con¬tractional domain, the central forearc basin domain, and the eastern contractional domain. Some degree of the oblique-interaction of the Australia and Pacific plates on the subduction thrust is inferred to be partitioned across the four structural domains and to be expressed dominantly as oblique-(dextral) slip on faults bordering the axial ranges, and as short¬ening on reverse faults and folds in more eastern parts of the forearc. The axial range domain involves the eastern parts of the North Island axial ranges where there is marked oblique-slip displacement on major faults. Some dextral offest is accommodated in the range front contractional domain, although dip-slip displacement is more significant. The central forearc basin domain is comparatively undeformed with only minor reverse faulting and (fault-force driven) folding. By comparison, the ad¬jacent eastern contractional domain, which comprises an accretionary wedge, is characterised by imbricate reverse and thrust faulting and associated folding. A small degree of dextral-slip is also accommodated in this domain. The uppermost parts of the inboard margin of the accretionary wedge, particularly the part onshore, is currently undergoing gravitationally-driven collapse expressed as deep-seated landslides and normal faulting. Many folds in the basin are fault-cored, several of which have been targeted in recent years by petroleum exploration companies (e.g. Hukarere-, Whakatu-and Kereru-). Most deformation of the forearc basin fill in central Hawke’s Bay is post early Nukumaruan (2.4 Ma) and much of this has occurred since the early Pleistocene (.8 Ma). Dextral-slip on Mohaka and Ruahine Faults since the Early Pliocene is likely to be less than 0 km. Significant unconformities in the basin fill reflect early phases of development of oblique-slip faults in the axial ranges. New dextral oblique-slip faults are developing in the basin fill to the east of the main oblique-slip faults bordering the ranges.en
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherMinistry of Economic Developmenten_NZ
dc.relation.urihttp://www.crownminerals.govt.nz/cms/petroleum/conferences/conference-proceedings-2006en
dc.rightsThis article has been published in Proceedings of New Zealand Petroleum Conference 2006, 6 – 10 March 2006. © 2006 K. J. Bland & P. J. J. Kamp.en
dc.subjectHawke’s Bayen
dc.subjectstructureen
dc.subjectfaultingen
dc.subjectfoldingen
dc.subjectNorth Island shear belten
dc.subjectstrike-slipen
dc.titleGeological structure of the forearc basin in central Hawke’s Bay, eastern North Islanden
dc.typeConference Contributionen
dc.relation.isPartOfProceedings of New Zealand Petroleum Conferenceen_NZ
pubs.begin-page1en_NZ
pubs.elements-id19404
pubs.end-page13en_NZ
pubs.finish-date2006-03-10en_NZ
pubs.start-date2006-03-06en_NZ


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