New Zealand Journal of Geology and Geophysics abstracts
Late Neogene sedimentation adjacent to the tectonically evolving
North Island axial ranges: insights from Kuripapango, western Hawke’s
Bay
Greg H. Browne
Institute of Geological & Nuclear Sciences
P.O. Box 30 368
Lower Hutt, New Zealand
email: g.browne@gns.cri.nz
Abstract Kuripapango-Blowhard is a relatively
small region in western Hawke’s Bay, but one that displays a
stratigraphically diverse Neogene sedimentary record. Earliest
sedimentation on greywacke basement consisted of late Miocene
(?Tongaporutuan–Kapitean) conglomerate, sandstone, and calcareous
sandstone of the Blowhard Formation (new). Deposition of
siliciclastic and mixed carbonate sediments of the Mangatoro, Te Waka,
Kaumatua, and Sentry Box Limestone Formations continued through to late
Pliocene (Nukumaruan) time. These sediments are divided into a broadly
transgressive to regressive succession that is up to 2 km thick.
The lithologies indicate a strong link between sediment supply and
active tectonism through time. An initial pulse of uplift is suggested
during the late Miocene, followed by widespread subsidence and relative
tectonic quiescence. A later, and temporally distinctive period of late
Pliocene tectonic uplift in the region has continued to the present
day. Contrasts in the sedimentary record in adjacent fault-bounded
blocks suggest different sedimentary histories related to whether the
fault blocks were uplifted and eroded, or were subsiding and were
depocentres for sediment.
Keywords sedimentation; tectonic uplift; Blowhard
Formation (new); Spiral Conglomerate Member (new); Waikarokaro Member
(new); Mangatoro Formation; Te Waka Limestone; Kaumatua Formation;
Sentry Box Limestone; Kaweka Range; Ruahine Range; Kuripapango; Hawke’s
Bay; new stratigraphic names
G03039; Received 9 April 2003; accepted 31 October 2003; Online
publication date 1 December 2004
New Zealand Journal of Geology & Geophysics, 2004, Vol. 47:
663–674
0028–8306/04/4704–0663© The Royal Society of New Zealand 2004
PDF file of entire paper: Print-quality
(6227K) | screen-quality (608K)
This year's abstracts |
Journal home page |
All abstracts |
Publishing home page
