Evolution of the Louisiade triple junction

Gaina, Carmen; Müller, R. Dietmar; Royer, Jean‐Yves; Symonds, P. A.

doi:10.1029/1999jb900038

Cited by 85 publications

(88 citation statements)

References 15 publications

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“…The Louisiade Plateau was likely rifted from the continental shelf by Coral Sea spreading ( Fig. 3; Gaina et al, 1999), and its overlying sediments are comparable with those of the Queensland Plateau (Taylor and Falvey, 1977). Thus, partial subduction of the Louisiade Plateau at the Pocklington Trough is a plausible mechanism for triggering ophiolite emplacement and transferring continentally derived zircons into the SIA (Fig.…”

Section: Tectonic Evolution Of the Sia Crustmentioning

confidence: 99%

“…Intrusive silicic magmatism is expressed on Guadalcanal as the Oligocene Umasani, Poha, and Lungga plutonic complexes (Hackman, 1980), and is temporally constrained by an early Miocene unconformity and a single 24.4 Ma (K-Ar) age from the Poha complex (Chivas and McDougall, 1978). The late Miocene reversal of subduction zone polarity (Petterson et al, 1999) consumed much of the Solomon Sea at the northeast-dipping South Solomon Trench System, juxtaposing the Louisiade Plateau, arguably a fragment of continental crust (Gaina et al, 1999), against the arc.…”

Section: Sia Regional Geology and Tectonicsmentioning

confidence: 99%

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From continent to intra-oceanic arc: Zircon xenocrysts record the crustal evolution of the Solomon island arc

Tapster

Roberts

Petterson

et al. 2014

Geology

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The fi rst U-Pb ages from a ca. 26-24 Ma pluton on Guadalcanal, in the intra-oceanic Solomon island arc (southwest Pacifi c Ocean), reveal Eocene-to Archean-aged zircon xenocrysts. Xenocryst populations at ca. 39-33 Ma and ca. 71-63 Ma correlate with previously obtained ages of supra-subduction magmatism within the arc. A ca. 96 Ma zircon population may be derived from Cretaceous ophiolite basement crust or region-wide continental rift-related magmatism. Xenocryst age populations alternate with periods of oceanic basin formation that fragmented the East Gondwana margin. Early Cretaceous to Archean zircon xenocryst ages imply continental origins and a cryptic source within the arc crust; they may have been introduced by Eocene interaction of a continental fragment with the arc, and concealed by ophiolite obduction. The data demonstrate that continentally derived zircons may be transported thousands of kilometers from their source and added to intra-oceanic arc magmas, a process likely facilitated by cyclical subduction zone advance and retreat. The fi ndings highlight the continuum of arcs that occurs between continental and oceanic end members, and the caution with which zircons should be used to determine the provenance and setting of ancient arc terranes accreted to the continental crust.

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Section: Tectonic Evolution Of the Sia Crustmentioning

confidence: 99%

Section: Sia Regional Geology and Tectonicsmentioning

confidence: 99%

From continent to intra-oceanic arc: Zircon xenocrysts record the crustal evolution of the Solomon island arc

Tapster

Roberts

Petterson

et al. 2014

Geology

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“…The best-known basin is the Tasman Sea, developed by spreading from 84 to 52 Ma (Gaina et al 1998). The New Caledonia Basin and the Loyalty Basin probably also opened at this time, with spreading in the Coral Sea from 64 to 52 Ma (Gaina et al 1999) (Fig. 4).…”

Section: Basins and Arcsmentioning

confidence: 99%

“…Rifting, probably due to rollback of a south-dipping subduction zone, produced rift fragments and backarc basin overlapping in age with Tasman Sea and Coral Sea (84-52 and 62-52 Ma, Gaina et al 1998Gaina et al , 1999. Examples include the Border Terrane in the west (Paleozoic sedimentary rocks and Permian to Triassic intrusions).…”

Section: Early Convergence: Cretaceous-paleocenementioning

confidence: 99%

Different styles of modern and ancient non-collisional orogens and implications for crustal growth: a Gondwanaland perspective

2016

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Non-collisional, convergent margin orogens are generally called accretionary orogens, although there may not have been horizontal accretion across the plate boundary. We revive the term non-collisional orogen and use a Gondwanaland perspective to discuss different types. On the northern margin of the Australian Plate, the New Guinea non-collisional, accretionary orogen was formed by large-scale terrane accretion across an advancing plate margin. On the eastern margin, the Southwest Pacific Orogen is a non-collisional and non-accretionary orogen, involving virtually no horizontal transfer of material across its eastward-retreating plate boundary. In the Tasmanides, the Lachlan Orogen, commonly described as an accretionary orogen, is another non-collisional, non-accretionary orogen developed behind the plate margin after major Cambrian rollback, with resultant backarc basins filled mainly by quartz-rich turbidites subsequently recycled. The outboard New England Orogen is a non-collisional but accretionary orogen, marked by the frontal accretion of continental margin arc detritus, subsequently recycled into younger arcs. The Permian to Cretaceous Rangitata Orogen of New Zealand is an ?oblique non-collisional, accretionary orogen in which Permian-Triassic sediments of the accretionary wedge have no link with inboard (near) arc terranes. Late Jurassic to Cretaceous parts were sourced by a combination of first cycle volcanogenic detritus passing through the forearc basin together with recycling of the exhumed parts of the wedge. All non-collisional orogens involve continental growth, but only the New England Orogen and to a lesser extent the New Guinea Orogen involve significant crustal growth.

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“…Rifting propagated northward east of Australia, forming the Tasman Sea, and final breakup off northeastern Australia took place in the Paleocene (~60 Ma) (Gaina et al, 1999). Thereafter, major ocean currents could flow along the eastern coasts of Australia and Tasmania, the ETP and STR, and along the Antarctic margin to the south.…”

Section: Nf Exon Et Al Leg 189 Synthesis: History Of the Tasmanianmentioning

confidence: 99%

The Evolution of Mid-Latitude Faunas During the Eocene: Late Eocene Lizards of the Medicine Pole Hills Reconsidered

Smith¹

2011

Bulletin of the Peabody Museum of Natural History

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Evolution of the Louisiade triple junction

Cited by 85 publications

References 15 publications

From continent to intra-oceanic arc: Zircon xenocrysts record the crustal evolution of the Solomon island arc

From continent to intra-oceanic arc: Zircon xenocrysts record the crustal evolution of the Solomon island arc

Different styles of modern and ancient non-collisional orogens and implications for crustal growth: a Gondwanaland perspective

The Evolution of Mid-Latitude Faunas During the Eocene: Late Eocene Lizards of the Medicine Pole Hills Reconsidered

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