Transect sismique continu entre l'arc des Nouvelles-Hébrides et la marge orientale de l'Australie: programme FAUST (French Australian Seismic Transect)

Beuque, Sabrina Van de; Auzende, Jean-Marie; Lafoy, Y.; Bernardel, George; Nercessian, A.; Régnier, Marc; Symonds, P. A.; Exon, N. F.

doi:10.1016/s1251-8050(99)80048-2

Cited by 11 publications

(9 citation statements)

References 13 publications

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“…The stratigraphic architecture has not previously been described in detail. Previous studies conducted on this basin estimated a 2000–4000‐m‐thick sedimentary cover (Ravenne et al ., ) deposited since the Cretaceous (Lafoy et al ., ; Van de Beuque et al ., ). Exon et al .…”

Section: Previous Studies and Stratigraphic Framework Of The Fairway mentioning

confidence: 97%

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Seismic stratigraphy and paleogeographic evolution of Fairway Basin, Northern Zealandia, Southwest Pacific: from Cretaceous Gondwana breakup to Cenozoic Tonga–Kermadec subduction

Rouillard¹,

Collot

Sutherland

et al. 2015

Basin Research

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We present the first comprehensive seismic-stratigraphic analysis of Fairway Basin, which is situated on the rifted continent of Zealandia in the Tasman Sea, southwest Pacific, between Australia and New Caledonia. The basin is 700 km long, 150 km wide, and has water depths of 500-3000 m. We describe depositional architecture and paleogeographic evolution of this basin. Basin formation was concurrent with two tectonic events: (i) Cretaceous rifting during eastern Gondwana breakup and (ii) initiation and Cenozoic evolution of Tonga-Kermadec subduction system to the east of the basin. To interpret the basin history we compiled and interpreted 2D seismic-reflection profiles and make correlations with DSDP boreholes and the geology of New

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Section: Previous Studies and Stratigraphic Framework Of The Fairway mentioning

confidence: 97%

“…Late Oligocene to Miocene intraplate volcanism on the Lord Howe Rise is likely linked to mantle plume activity (), and could be associated with the age‐progressive Tasmantid and Lord Howe hotspot chains (THC and LHHC in the Fig. inset) (Van de Beuque et al ., ; Exon et al ., ; Rollet et al ., ).…”

Section: Geodynamics and Geological Setting Of Zealandiamentioning

confidence: 99%

Seismic stratigraphy and paleogeographic evolution of Fairway Basin, Northern Zealandia, Southwest Pacific: from Cretaceous Gondwana breakup to Cenozoic Tonga–Kermadec subduction

Rouillard¹,

Collot

Sutherland

et al. 2015

Basin Research

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“…New Caledonia is located at the northern termination of the Norfolk Ridge, a stretched continental fragment rifted off the eastern Australian margin during the Early Cretaceous rollback of the Western Pacific subduction zone and the opening of New Caledonia and Loyalty basins (Weissel and Hayes, 1977;Van de Beuque et al, 1998;Schellart et al 2006).…”

Section: Geological Settingmentioning

confidence: 99%

Strain localization and fluid infiltration in the mantle wedge during subduction initiation: Evidence from the base of the New Caledonia ophiolite

Soret

Agard

Dubacq

et al. 2016

Lithos

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International audienceDespite decades of petrological and geochemical studies, the nature and setting of obducted ophiolites remain controversial: the influence of supra-subduction zone environments on pre-existing oceanic lithosphere is yet to assess, and the processes leading to subduction/obduction initiation are still poorly constrained. Our study documents successive influx of slab-derived fluids and progressive strain localization within the upper mantle in a supra-subduction environment during the first few My of the subduction history. We focus on strongly sheared mafic amphibolites intruding peridotites near the mantle–crust transition of the New Caledonia obducted ophiolite and ~ 50 to 100 m above the basal thrust contact of the ophiolite. These m- to hm-long and several m-thick shear bands are interpreted as inherited small-scale intrusions of mafic melts, probably dikes or sills, which were derived from a moderately refractory mantle source refertilized by supra-subduction zone fluids. 40Ar/39Ar age constraints on pargasite at ca. 90 Ma suggest that they could be inherited from the former Pacific west-dipping subduction.Secondary deformation of these mafic intrusions is intimately associated to three major stages of fluid infiltration: (1) the first stage of deformation and metasomatism is marked by syn-kinematic growth of Ca-amphibole (at 700–800 °C and 3–5 kbar) with a distinctive supra-subduction zone signature, and controlled later channelization of aqueous fluids. 40Ar/39Ar dating on magnesio-hornblende indicates that this deformation episode occurred at ca. 55 Ma, coincident with east-dipping subduction initiation; (2) the main metasomatic stage, characterized by the development of a phlogopite-rich matrix wrapping peridotites and amphibolite boudins, points to the percolation of alkali-rich aqueous fluids at still high temperature (650–750 °C); (3) the last, low temperature (< 600 °C) metasomatic stage results in the formation of deformed veinlets containing talc, chlorite and serpentine

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“…Seismic profiles ( [19,33]; augmented by Stampfli, unpublished data from SHELL) suggest the New Caledonia Basin is an abandoned rift (i.e., no oceanic crust, but see [42] for different interpretations), with Cretaceous sediment infill.…”

Section: Gondwana Fitmentioning

confidence: 99%

“…Seismic profiles in the New Caledonia basin indicate basin infill of probable mid-Cretaceous age (e.g., [19,42]). Those data are interpreted as recording rifting away of the GDUs lying east of Lord Howe Rise.…”

Section: Early Cretaceous Evolution-passive Margin Inversionmentioning

confidence: 99%

Geodynamic Reconstructions of the Australides—2: Mesozoic–Cainozoic

Vérard

Stampfli

2013

Geosciences

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The present work, derived from a full global geodynamic reconstruction model over 600 Ma and based on a large database, focuses herein on the interaction between the Pacific, Australian and Antarctic plates since 200 Ma, and proposes integrated solutions for a coherent, physically consistent scenario. The evolution of the Australia-Antarctica-West Pacific plate system is dependent on the Gondwana fit chosen for the reconstruction. Our fit, as defined for the latest Triassic, implies an original scenario for the evolution of the region, in particular for the "early" opening history of the Tasman Sea. The interaction with the Pacific, moreover, is characterised by many magmatic arc migrations and ocean openings, which are stopped by arc-arc collision, arc-spreading axis collision, or arc-oceanic plateau collision, and subduction reversals. Mid-Pacific oceanic plateaus created in the model are much wider than they are on present-day maps, and although they were subducted to a large extent, they were able to stop subduction. We also suggest that adduction processes (i.e., re-emergence of subducted material) may have played an important role, in particular along the plate limit now represented by the Alpine Fault in New Zealand.

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Transect sismique continu entre l'arc des Nouvelles-Hébrides et la marge orientale de l'Australie: programme FAUST (French Australian Seismic Transect)

Cited by 11 publications

References 13 publications

Seismic stratigraphy and paleogeographic evolution of Fairway Basin, Northern Zealandia, Southwest Pacific: from Cretaceous Gondwana breakup to Cenozoic Tonga–Kermadec subduction

Seismic stratigraphy and paleogeographic evolution of Fairway Basin, Northern Zealandia, Southwest Pacific: from Cretaceous Gondwana breakup to Cenozoic Tonga–Kermadec subduction

Strain localization and fluid infiltration in the mantle wedge during subduction initiation: Evidence from the base of the New Caledonia ophiolite

Geodynamic Reconstructions of the Australides—2: Mesozoic–Cainozoic

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