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

太平洋-南极海脊是描述太平洋盆地和周围大陆地体板块相对运动的板块回路中的关键环节。该项目包括在船上对跨越太平洋-南极海脊的高纬度关键流线进行调查。该项目的目标是：(1)建立南太平洋过去50 Ma的高分辨率板块运动学模型；(2)分析海脊平行和断裂带地壳形态的时间演化；(3)结合Geosat、水文扫描和重力数据，模拟断裂带FZ XII的深部结构；(4)评价化学剩磁和热粘性磁化对海洋磁异常来源的贡献。

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.