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island arc

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.07 sec.
island arc
A usually curved chain of volcanic islands bounded on the convex side by a deep oceanic trench. Island arcs form in the overriding tectonic plates of subduction zones as the result of rising melt from the downgoing plate. The arcs are curved because of the curvature of the Earth. The Aleutian Islands, in Alaska, are an island arc. An island arc is a kind of volcanic arc.


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The Kaputusan prospect is a typical Western Pacific island arc porphyry copper-gold system.
Asia Gold Signs Agreement to Explore the Kaputusan Porphyry ... by Business Wire
A typical Island Arc type porphyry copper/ gold 'core' is now evident in the interpretation of the soil geochemical anomalies from the approximately 1km x 1km Kodu NW soil grid, weakening peripherally to a halo of molybdenum, lead and zinc geochemistry.
South Pacific Minerals Corp.: Porphyry Copper/Gold Target Defined By ... by Business Wire
The other half of the project area has a slightly deeper erosional level and is underlain by late Triassic to Cretaceous island arc intrusives
Geoinformatics Enters Into A Joint Venture With Redton Resources Inc. ... by Business Wire
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