island arc


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Related to island arc: rift valley

island arc

[′ī·lənd ¦ärk]
(geography)
A group of volcanic islands, usually situated in a curving arch-like pattern that is convex toward the open ocean, having a deep trench or trough on the convex side and usually enclosing a deep basin on the concave side; formed by volcanic activity associated with oceanic plate subduction at convergent plate margins. Also known as volcanic arc.
References in periodicals archive ?
Souther (1972) stated that island arc volcanic edifices are partly preserved in the Cordillera but ophiolite suites have not been identified.
1973 'Distribution and Petrology of Late Cenozoic Volcanoes in Papua New Guinea'The Western Pacific: Island arcs, marginal seas, geochemistry, P.
Several manifestations of porphyry type polymetallic deposits have been identified in Chagai Kohistan Island Arc System.
The Kaputusan prospect is a typical Western Pacific island arc porphyry copper-gold system.
At Taiwan, the plate boundary is characterized by a zone of arc-continent collision, whereby the northern end of the Luzon island arc is colliding with the buoyant crust of the Eurasia continental margin offshore China.
Their evidence supports a new timeline of collisional events: Fifty million years ago, India collided with a string of islands, pushing the island arc northward.
Island Arc Exploration Corporation, Jaguar Minerals Limited and BWG.
Island arc tholeiites exhibit relatively flat REE profiles, with minor depletion in light rare-earth-elements LREE).
The island of New Britain and other islands off the north coast of Papua New Guinea contain a chain of Pleistocene to Holocene calc-alkaline strato-volcanoes called the Bismarck Island Arc.
All of these properties are located in northern Mongolia and were targeted, due to their similar geological settings, to either the Oyu Tolgoi Island Arc porphyry copper-molybdenum-type deposit of Ivanhoe Mines or to the largest operating mine in Mongolia, the huge Erdenet porphyry copper-molybdenum-type deposit.
1979, Island arc development: some observations, experiments and speculations: Journal of Geology, v.