back-arc basin


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back-arc basin

[′bak‚ärk ‚bās·ən]
(geology)
The region (small ocean basin) between an island arc and the continental mainland formed during oceanic plate subduction, containing sediment eroded from both.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The Chilas Complex is a ~40 wide and 300 long composite plutonic body exposed in the central part of Kohistan island arc, which formed first as intra-oceanic island arc in the Neo-tethyan oceanic crust and later transformed into Andean-type continental margin after the closure of back-arc basin. Two suture zones, i) the Northern suture (MKT) and the Southern suture (MMT) mark tectonic boundaries of the arc with the Karakoram micro-continent and the Indian continental plate respectively.
Since 1990, studies on hydrothermal plumes in the eastern Manus back-arc basin have been carried out.
The Integrated Ocean Drilling Program (IODP) Expedition 331 recovered sediments within the Iheya North Hydrothermal Field in the Okinawa back-arc basin to explore the extent and diversity of the "subvent" biosphere.
Previous works have reported that these rocks were originated from various kinds of upper mantle to crustal sections of ocean basin (OB) (i.e., MORB origin), intra-oceanic island-arc (intra-OIA), and back-arc basin (BAB) [5, 6].
Morphological and anatomical studies on a new lepetodrilacean limpet (Gastropoda, Prosobranchia) from hydrothermal vents at the Manus Back-Arc Basin (Bismarck Sea, Papua New Guinea).
gather together 10 papers and three case studies that study the geological, biological, chemical, and physical interactions that occur along back-arc basin spreading centers.
About a mile and a half down, the basin could hold answers to questions about the origin of life on Earth, say the scientists, whose plans for their "South Pacific Odyssey" include an unprecedented number of research expeditions to this geologically unique "back-arc basin" during the next two years.
Kirsten McLaughlin, Sandra Barr and co-workers detail the age, chemistry, and tectonic setting of the Moosehorn plutonic suite, a diverse assemblage of co-magmatic plutons, which likely originated in an extensional, back-arc basin environment.
sp.--a new mesogastropod (Gastropoda: Prosobranchia) from hydrothermal vents in the Manus back-arc basin (Bismarck Sea, Papua New Guinea).
Between these, two eruptive belts developed: the Faja Eruptiva de la Puna Occidental and the Faja Eruptiva de la Puna Oriental, separated by a back-arc basin (Fig.