Collaborative Research: The SW Pacific GPS Project

BEVIS 9419262西南太平洋全球定位系统项目利用全球定位系统监测跨越澳大利亚板块和太平洋板块之间的板块边界复合体的地壳运动，在那里，汤加和新赫布里底群岛这两个极性相反的活跃俯冲系统由包括北斐济和刘盆地在内的广泛弧间区域形成。GPS网直接观测了正常板块和碰撞板块会聚、弧内应变和弧后扩张的运动学。该项目开展了三次成功的全球定位系统运动：1988年的一次小规模运动和1990年和1992年的两次大型运动。目前的项目将扩大该地区现有的全球定位系统网络。以往的结果表明，一些迄今观察到的最迅速的无地震地壳运动发生在汤根趋势，该地区正在发生非常复杂的地壳块体之间的水。重要的是要对之前的情况进行跟踪，以确认存在实际的观察结果。

Bevis 9419262 The SW Pacific GPS Project has used the Global Position System (GPS) to monitor crustal motion across and within a plate boundary complex between the Australian and Pacific plates, where two active subduction systems of opposite polarity, the Tonga and New Hebrides island arcs are set by a broad interarc region which includes the North Fiji and Lau Basins. The GPS net has directly observed the kinematics of normal and collisional plate convergence, intra-arc strain and back-arc spreading. The Project has mounted three successful GPS campaigns: a small one in 1988 and two large campaigns in 1990 and 1992. The current project will the existing GPS network in this region. Prior results have demonstrated that some of the most rapid aseismic crustal motions ever observed are taking place in the Tongen trend, and that very complex water between crustal blocks are taking place in this region. It is important to follow up on the previous to confirm there actonisting observations.