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

印度尼西亚伊里安再也快速剪切带的 GPS 观测和数值模拟

• 批准号: 0073769
• 负责人: Robert McCaffrey
• 金额: $ 21万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0073769&HistoricalAwards=false
• 关键词: GPS; Observations; Numerical; Modeling; Rapid

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.

罗布·麦卡弗里0073769澳大利亚大陆北方边缘的鸟头地区拥有世界上滑动最快的大陆走滑系统。初步证据表明，块体旋转伴随着剪切。研究人员建议通过在伊里安查亚剪切带上增加GPS测量数据来提高我们对大陆分布剪切和块体旋转力学的理解。他们将安装大约40个新的GPS站点，并在2.5年的时间间隔内测量两次。这些数据将使研究人员能够测试伊里安查亚剪切带内的变形分布是否与“浮动块”模型相一致，在该模型中，地壳块被流动地幔赋予的基底上的牵引力移动。