Seismic Project Information RC2901
Interaction between the Chile Ridge and Chile Trench
This geophysical field program surveyed the southern Chile margin where a mid-ocean spreading ridge (Chile Ridge) is being subducted along the Chile Trench (Chile Triple Junction). It was funded by ENAP (lines 727-732) and NSF (lines 733-781). The principal scientific objectives of this survey were 1) to test models for the tectonic effects of ridge crest subduction, and 2) study subduction processes under the extremal conditions of a ridge-trench collision. Specific objectives involved comparing the deep structure, surficial morphology, and tectonic fabric of the inner-trench wall in zones corresponding to conditions before, during and after ridge-trench collision.
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