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New Caledonia basin-Fairway ridge : structural and sedimentary study

Ravenne C., Broin C.E. de, Dupont Jacques, Lapouille André, Launay Jean. 1977. Symposium International.
New Caledonia basin-Fairway ridge : structural and sedimentary study
ARTICLE, CONFERENCEOBJECT, (1977 ) - PUBLISHEDVERSION - English (en-GB)
Symposium International
OPENACCESS - .
Audience : RESEARCHERS, STUDENTS, TEACHERS
Technip
Subject
GEOPHYSIQUE, MILIEU MARIN, TECTONIQUE DE PLAQUES, GEOLOGIE STRUCTURALE, PROFIL SISMIQUE, SISMIQUE A REFLEXION, GENESE, ANOMALIE MAGNETIQUE, SISMOLOGIE, INTERPRETATION
Domains
Géographie, Géologie, Sciences de la Terre
Description

Austradec I and II marine seismic surveys carried out in 1972 and 1973 by the IFP-CEPM-ORSTOM group in the southwes tem Pacifi,c contribüted to the exploration of the structural elements located between Lord Howe Rise and Norfolk Ridge, investigated the sedimentary fills in accordance with data from DSDP boreholes, and pointed out the importance of volcanic alignments.


The leading structural element discovered by these surveys was the Fairway Ridge beginning at Fairway Reef in the North. Two of us (C.E. de Broin and C. Ravenne) consider that this ridge prolongs into West Norfolk Ridge towards the South.


The discovery of this ridge thus leads us to divcde the New Caledonia Basin into an eastem New Caledonia Basin sensu stricto and a wes tem Fairway Basin.


A study of seismic facies and data from DSDP boreholes enables us to suggest that the fill in the New Caledonian Basin sensu stricto is mainly of turbidite origin and that in the Fairway Basin is mainly pelagic except in its southem part. The proportion of elements derived from volcanism is considerable in both basins.


Lastly, we clearly delimit two volcanic alignments, i.e. one located in the eastem part of Lord Howe Rise, and the other in the westem part of Norfolk Ridge.


In this paper we first describe the structural elements, and then we show how magnetic data confirm our hypotheses , before examining the sedimentary series.

Keywords
Language
English (en-GB)
Creators
Ravenne C., Broin C.E. de, Dupont Jacques, Lapouille André, Launay Jean
Contributors
Sources
In : Geodynamics in South-West Pacific = géodynamique du Sud-Ouest Pacifique. Paris : Technip, 1977, p. 145-154. Geodynamics in South-West Pacific = Géodynamique du Sud-Ouest Pacifique : Symposium International, Nouméa (NC), 1976/08/27; 1976/09/02
Coverage
NOUVELLE CALEDONIE
Name of newspaper
Symposium International