Mapping of lowPwave velocity structures in the subducting plate of the central New Hebrides, southwest Pacific

1991 ◽  
Vol 96 (B12) ◽  
pp. 19825-19842 ◽  
Author(s):  
R. Prevot ◽  
S. W. Roecker ◽  
B. L. Isacks ◽  
J. L. Chatelain
Keyword(s):  
Southwest Pacific ◽  
New Hebrides ◽  
Subducting Plate

Geochemistry vs. seismo-tectonics along the volcanic New Hebrides Central Chain (Southwest Pacific)

1997 ◽  
Vol 78 (1-2) ◽  
pp. 1-29 ◽  
Author(s):  
Michel Monzier ◽  
Claude Robin ◽  
Jean-Philippe Eissen ◽  
Jo Cotten
Keyword(s):  
Southwest Pacific ◽  
New Hebrides

Sur quelques echinides fossiles etrangers

1955 ◽  
Vol S6-V (7-9) ◽  
pp. 553-561
Author(s):  
Alphonse Jeannet
Keyword(s):  
Southwest Pacific ◽  
New Hebrides

Abstract Three echinoids are described--Tithonia arctica n.sp. from the Valanginian (Cretaceous) of eastern Greenland, Leiocidaris thiebaudi n.sp. from the Albian (Cretaceous) of Catunbela near Lobito, Angola, and Parasalenia cf. poehlii from the Pliocene of Erromango in the New Hebrides (southwest Pacific).

Phytogeographical relationships of the northern islands of the New Hebrides

1975 ◽  
Vol 272 (918) ◽  
pp. 385-390 ◽  
Keyword(s):  
Geographical Distribution ◽  
Computer Analysis ◽  
Field Data ◽  
Evidence Based ◽  
Pacific Region ◽  
Vegetation Types ◽  
Southwest Pacific ◽  
The North ◽  
New Hebrides

A brief account is given of the geographical distribution of the major vegetation types in the New Hebrides. Evidence based on computer analysis of field data indicates a disjunction at about I8° S latitude that divides the island chain into ‘northern’ and ‘southern’ groups with an attenuation from complex to simple vegetation types as latitude increases. The phytogeography of some of the major vegetation types in the north is discussed within the context of the southwest Pacific region.

scholarly journals Tectonics, Magmatism, and Evolution of the New Hebrides Backarc Troughs (Southwest Pacific)

1995 ◽  
pp. 177-235 ◽  
Author(s):  
Patrick Maillet ◽  
Etienne Ruellan ◽  
Martine Gérard ◽  
Alain Person ◽  
Hervé Bellon ◽  
...  
Keyword(s):  
Southwest Pacific ◽  
New Hebrides

Mélange versus fluid and melt enrichment of subarc mantle: A novel test using barium isotopes in the Tonga-Kermadec arc

Geology ◽  
2020 ◽  
Vol 48 (11) ◽  
pp. 1053-1057 ◽  
Author(s):  
Fei Wu ◽  
Simon Turner ◽  
Bruce F. Schaefer
Keyword(s):  
Pacific Ocean ◽  
Partial Melting ◽  
Oceanic Crust ◽  
Pb Isotope ◽  
Southwest Pacific ◽  
The Past ◽  
Isotope Study ◽  
Subducting Plate ◽  
Model Components

Abstract In the past few years, the so-called mélange model has been offered as an alternative to the long-standing model of enrichment of the subarc mantle by separate additions of fluid and sediment components from the subducting plate. In the mélange model, components from the subducting plate become physically mixed at the slab-mantle interface. Partial melting of the peridotite subsequently occurs after being hybridized by the mélange material that diapirically rises into hotter portions of the wedge. Here, we present the first Ba isotope study of lavas from the Tonga-Kermadec arc (southwest Pacific Ocean) and show that Ba isotopes distinguish between fluid and melt derived from different subducted components. This provides fresh constraints on the debate. Remarkable along-strike Ba isotope variations were observed and are best explained by contributions from variable proportions of sediment and altered oceanic crust (AOC) fluid from the subducting plate. Combined Ba-Sr-Pb isotope relationships indicate that sediment melt and AOC fluid were added to the source of the arc lavas separately at different times. This is inconsistent with the mélange model, at least in this arc.

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