Journal and Proceedings of
The Royal Society of New South Wales
Volume 130 Parts 1 and 2 [Issued June, 1997]
CONTENTS
| AUTHORS & TITLES | PAGES |
| Neef, G. Stratigraphy and structure of an outboard part of the forearc of the Hikurangi Margin, North Wairarapa, New Zealand. | 1-24 |
| Dussal, R. Nuclear Propulsion for Submarine and Surface Vessels A Review [No Abstract] | 25-34 |
| Theses Abstracts [Not reproduced on this page, but available here] | |
| Brett, M. The effect of tenure on range management | 35 |
| Frost, W.K. The ecology of cereal rust mite Abacarus hystrix (Nalepa) in irrigated perennial dairy pastures in South Australia | 37-38 |
| Garrety, K. Negotiating dietary knowledge inside and outside laboratories: the cholesterol controversy | 39 -40 |
| Timmers, H. Expressions of inner freedom: an experimental study of the scattering and fusion of nuclei at energies spanning the Coulomb barrier | 41-42 |
vol 130 parts 1-2, pp. 1-24
Stratigraphy and structure of an outboard part of the forearc of the Hikurangi Margin, North Wairarapa, New Zealand
G. Neef
Abstract. The area studied lies inboard of the trench slope break in the forearc part of the Hikurangi Margin in North Wairarapa, North Island, New Zealand. It lies above a west-subducting Pacific plate. The geology of parts of two units of the forearc (the Tawhero Basin and the forearc ridge) are described. The major trending Tinui Fault separates the Tawhero Basin from the trench slope break, which lies to its east - it resembles the Mentawai Fault of offshore Sumatra. The NNE-trending Waihoki Fault separates the Tawhero Basin from the foreare ridge which lies to its west. These faults were active during much of Miocene time forming a graben between them. Associated with graben formation was dextral transpression which was caused by oblique subduction of the underlying Pacific plate. The Waihoki Fault has been inactive since 6 Ma.
Most of the strata of the study area comprise Owahanga Group (mid-late Miocene), which are well developed in the northeast-trending Tanawa Syncline, and the Hurupi and the Te Hoe Groups (late Miocene), which are well developed west of the Waihoki Fault. Cretaceous strata (Mangapokia, Te Mai, and Whangai Formations) crop out locally along the western margin of the area. The youngest strata, Waihoki Formation (Te Hoe Group) of Kapitean (latest Miocene) age crop out within the north-trending Tawhero Syncline in the centre of the mapped area. Much of the development of the Tawhero Syncline near Tawhero Station has occurred since early Pliocene time indicating increased compression since then. Associated with this increased compression has been substantial uplift - as demonstrated by the Holocene incision of the meander belts of rivers.
Keywords: Forearc basin, Hikurangi Margin, southern Tawhero Basin, forearc ridge, structure, tectonics, stratigraphy, geological history.
vol 130 parts 1-2, pp. 25-34
Nuclear propulsion for submarine and surface vessels: a review
Dussol, R.
[No abstract]