A High Resolution Plate Kinematic Flowline of the Pacific- Antarctic Ridge

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The Pacific-Antarctic ridge is the key link in the plate circuit describing the relative motion of the plates of the Pacific basin and the surrounding continental terranes. This project involves a shipboard survey of critical flowline, at high latitude, crossing the Pacific-Antarctic ridge. The objectives of the program are to: (1) construct a high resolution plate kinematic model of the South Pacific for the past 50 Ma; (2) analyze the temporal evolution of both ridge parallel and fracture zone crustal morphology; (3) model the deep structure of fracture zone FZ XII using combine Geosat, Hydrosweep, and gravity data; and (4) evaluate the contributions of chemical remnant magnetization and thermo-viscous magnetization to the source of marine magnetic anomalies.