Abstract
The Solomon arc lacks subduction-associated volcanism in its eastern part. This anomalous absence arose from the collision of the submarine Ontong Java Plateau with the Solomon arc about 8 m.y. ago and a consequent flip in subduction. Collision was most forceful over the eastern half, so that the new, north-plunging slab of Indo-Australian plate remained in collisional contact with the thick oceanic crust (>40 km) and lithosphere of the Ontong Java Plateau along a face of cooled depleted refractory mantle; there is no intervening asthenospheric wedge, and therefore no magma production.
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Coleman, P.J., Kroenke, L.W. Subduction without volcanism in the Solomon Islands arc. Geo-Marine Letters 1, 129–134 (1981). https://doi.org/10.1007/BF02463330
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DOI: https://doi.org/10.1007/BF02463330