GPS Observations and Numerical Modeling of a Rapid Shear Zone in Irian Jaya, Indonesia

罗布·麦卡弗里，0073769，位于澳大利亚大陆北部边缘的鸟头区，拥有世界上滑动速度最快的大陆走滑系统。初步证据表明，块体旋转伴随着剪切。研究人员建议，通过加强伊里安查亚剪切带上的GPS测量，提高我们对大陆分布剪切和块体旋转机制的理解。他们将安装大约40个新的GPS站点，并在两年半的时间间隔内测量两次。这些数据将使研究人员能够测试Irian Jaya剪切带内的形变分布是否与浮动块体模型一致，在浮动块体模型中，地壳块体通过流动的地幔赋予其底部的牵引力来移动。

Rob McCaffrey 0073769 The Bird's Head region at the northern edge of the Australian continent contains the world's fastest slipping continental strike-slip system. Preliminary evidence indicates that block rotation accompanies the shear. The investigators propose to improve our understanding of the mechanics of distributed shear in continents and of block rotations by densifying GPS measurements across the Irian Jaya shear zone. They will install about 40 new GPS sites and measure them twice over a 2.5 year interval. These data will allow the investigators to test whether or not the distribution of deformation within the Irian Jaya shear zone is consistent with 'floating block' models in which crustal blocks are moved by tractions on their bases imparted by a flowing mantle.