Hikurangi Plateau: Crustal structure, rifted formation, and Gondwana subduction history
نویسندگان
چکیده
s of the 12th Annual Goldschmidt Conference, V. M., Geochim. Cosmochim. Acta, 66(15A), 580. Phinney, E. J., et al. (1999), Sequence stratigraphy, structure, and tectonic history of the southwestern Ontong Java Plateau adjacent to the North Solomon Trench and Solomon islands arc, J. Geophys. Res., 104(B9), 20,449 – 20,466, doi:10.1029/1999JB900169. Phinney, E. J., et al. (2004), Sequence stratigraphy, structural style, and age of deformation of the Malaita accretionary prism: Solomon Arc-Ontong Java Plateau convergent zone,Tectonophysics, 389(3–4), 221–246, doi:10.1016/j.tec-
منابع مشابه
Subduction of the oceanic Hikurangi Plateau and its impact on the Kermadec arc.
Large igneous province subduction is a rare process on Earth. A modern example is the subduction of the oceanic Hikurangi Plateau beneath the southern Kermadec arc, offshore New Zealand. This segment of the arc has the largest total lava volume erupted and the highest volcano density of the entire Kermadec arc. Here we show that Kermadec arc lavas south of ~32°S have elevated Pb and Sr and low ...
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The Ontong Java-Manihiki-Hikurangi plateau (OJMHP) is considered to have originated from a starting mantle plume, and have been rifted apart by two spreading ridges. However, the ages of these spreading ridges and their possible interactions with the presumed mantle plume are unclear. The Manihiki-Hikurangi plateau has been rifted apart by the Osbourn Trough which formed the southwestern Pacifi...
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In the process of subducted slab capture, a spreading ridge approaches subparallel to a subduction zone following the trailing edge of a downgoing plate. Eventually the downgoing plate is too young and small to subduct, and spreading stops. The spreading ridge stalls many tens of kilometres outboard of the subduction zone. The subducted plate welds to the outboard plate across the dormant sprea...
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[1] A regional study starting from detailed geological mapping has been carried out in the Malpica‐Tui Complex of Galicia in NW Spain. The complex is formed by two units representing pieces of the external edge of Gondwana, subducted and exhumed during the Variscan collision. The study shows that synsubduction and early synexhumation structures in continental subduction channels tends to be obs...
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[1] The Osbourn Trough is a fossil spreading center that rifted apart the Manihiki and Hikurangi Plateaus during Cretaceous time. Previous models of the Osbourn spreading center are based on data collected near the trough axis, and therefore only constrain the history of the Osbourn spreading center during the last few Ma of spreading. Our data set includes multibeam data collected northward to...
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