Geometrical control of subduction-related magmatism: the Mesozoic and Cenozoic plutonic history of Western Colombia

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Abstract
Radiometric age data from Western Colombia, combined with geological evidence, allow five main plutonic episodes, ranging in age from Triassic to Tertiary, to be recognized. It is suggested that variation in the convergence angle of the oceanic plate relative to the continental edge was an important factor affecting the timing and spatial distribution of plutonic activity. On a regional scale, major breaks in activity are probably best attributed to either low-angle/parallel convergence or periods of accretion along the convergent margin.