The early Pliocene Titiokura Formation: stratigraphy of a thick, mixed carbonate-siliciclastic shelf succession in Hawke's Bay Basin, New Zealand

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dc.contributor.authorBland, Kyle J.en_US
dc.contributor.authorKamp, Peter J.J.en_US
dc.contributor.authorPallentin, Arneen_US
dc.contributor.authorGraafhuis, Rhys B.en_US
dc.contributor.authorNelson, Campbell S.en_US
dc.contributor.authorCaron, Vincenten_US
dc.date.accessioned2008-03-19T05:08:31Z
dc.date.available2007-04-22en_US
dc.date.available2008-03-19T05:08:31Z
dc.date.issued2004-12-01en_US
dc.description.abstractThis paper presents a systematic stratigraphic description of the architecture of the early Pliocene Titiokura Formation (emended) in the Te Waka and Maungaharuru Ranges of western Hawke's Bay, and presents a facies, sequence stratigraphic, and paleoenvironmental analysis of the sedimentary succession. The Titiokura Formation is of early Pliocene (Opoitian-Waipipian) age, and unconformably overlies Mokonui Formation, which is a regressive late Miocene and early Pliocene (Kapitean to early Opoitian) succession. In the Te Waka Range and the southern parts of the Maungaharuru Range, the Titiokura Formation comprises a single limestone sheet 20-50 m thick, with calcareous sandstone parts. In the vicinity of Taraponui Trig, and to the northeast, the results of 1:50 000 mapping show that the limestone gradually partitions into five members, which thicken markedly to the northeast to total thicknesses of c. 730 m, and concomitantly become dominated by siliciclastic sandstone. The members (all new) from lower to upper are: Naumai Member, Te Rangi Member, Taraponui Member, Bellbird Bush Member, and Opouahi Member. The lower four members are inferred to each comprise an obliquity-controlled 41 000 yr 6th order sequence, and the Opouahi Member at least two such sequences. The sequences typically have the following architectural elements from bottom to top: disconformable sequence boundary that formed as a transgressive surface of erosion; thin transgressive systems tracts (TSTs) with onlap and backlap shellbeds, or alternatively, a single compound shellbed; downlap surface; and very thick (70-200 m) highstand (HST) and regressive systems tracts (RST) composed of fine sandstone. The sequences in the Opouahi Member have cryptic TSTs, sandy siltstone to silty sandstone HSTs, and cross-bedded, differentially cemented, fine sandstone RSTs; a separate variant is an 11 m thick bioclastic limestone (grainstone and packstone) at the top of the member that crops out in the vicinity of Lake Opouahi. Lithostratigraphic correlations along the crest of the ranges suggest that the Titiokura Formation, and its correlatives to the south around Puketitiri, represent a shoreline-to-shelf linked depositional system. Carbonate production was focused around a rocky seascape as the system onlapped basement in the south, with dispersal and deposition of the comminuted carbonate on an inner shelf to the north, which was devoid of siliciclastic sediment input. The rates of both subsidence and siliciclastic sediment flux increased rapidly to the northeast of the carbonate "platform", with active progradation and offlap of the depositional system into more axial parts of Hawke's Bay Basin.en_US
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dc.identifier.citationBland, K. J., Kamp, P. J. J., Pallentin, A., Graafhuis, R., Nelson, C. S., & Caron, V. (2004). The early Pliocene Titiokura Formation: stratigraphy of a thick, mixed carbonate-siliciclastic shelf succession in Hawkes Bay Basin, New Zealand. New Zealand Journal of Geology & Geophysics. 47(4), 675-695.en_US
dc.identifier.doi10.1080/00288306.2004.9515083en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/218
dc.language.isoen
dc.publisherSIR Publishingen_NZ
dc.relation.isPartOfNew Zealand Journal of Geology & Geophysicsen_NZ
dc.relation.urihttp://www.rsnz.org/publish/nzjgg/2004/050.phpen_US
dc.rightsThis article has been published in the New Zealand Journal of Geology and Geophysics. (c) 2004 Royal Society of New Zealand.en_US
dc.subjectPlioceneen_US
dc.subjectOpoitianen_US
dc.subjectWaipipianen_US
dc.subjectHawke's Bay Basinen_US
dc.subjectTe Aute limestone lithofaciesen_US
dc.subjectsequence stratigraphyen_US
dc.subjectTitiokura Formationen_US
dc.subjectNaumai Memberen_US
dc.subjectTe Rangi Memberen_US
dc.subjectTaraponui Memberen_US
dc.subjectBellbird Bush Memberen_US
dc.subjectOpouahi Memberen_US
dc.subjectnew stratigraphic namesen_US
dc.titleThe early Pliocene Titiokura Formation: stratigraphy of a thick, mixed carbonate-siliciclastic shelf succession in Hawke's Bay Basin, New Zealanden_US
dc.typeJournal Articleen_US
pubs.begin-page675en_NZ
pubs.elements-id30421
pubs.end-page695en_NZ
pubs.issue4en_NZ
pubs.volume47en_NZ
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