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The origin of intraplate volcanism not directly part of a hotspot track, such as diffuse seamount provinces, and the extent of mantle plume influence on the upper mantle remain enigmatic. Here we present new 40 Ar/ 39 Ar age data and geochemical (major and trace-element and Sr–Nd–Pb isotopic) data from seamounts on the Cocos Plate presently located offshore of NW Costa Rica and SW...
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