U.S.-Indonesia Cooperative Research: Geodetic investigation of oblique plate convergence in Sumatra

本提案请求资金，允许加州大学圣地亚哥分校斯克里普斯海洋学研究所的耶胡达·博克博士与印度尼西亚国家测绘协调机构（BAKOSURTANAL）的雅各布·赖斯博士进行为期24个月的印度尼西亚群岛构造研究，使用全球定位系统（GPS）的测量结果。他们将研究苏门答腊岛与斜板块辐合有关的变形。具体来说，他们将通过测量苏门答腊断裂带西南和东北方向的变形，来研究平行于辐合边缘的断层上斜滑解耦为正常俯冲和剪切滑动的机制。该项目的长期目标是将GPS测量扩展到整个印度尼西亚群岛，集中研究特定的构造问题，如印度尼西亚东部班达弧与大陆碰撞相关的滑动分布和速率。在印尼地区，造山、大陆增生、大陆破坏、蛇绿岩位移、俯冲带发育、弧极性反转、盆地闭合等构造作用正在活跃。这个项目将为美国科学家提供一个观察这种现象的独特机会。由于印度尼西亚位于地震和火山活动区，监测地壳变形也具有潜在的人道主义和经济价值。美国和印度尼西亚的合作者是备受尊敬的科学家，他们在该项目领域有成功的研究记录。目前的项目将允许合作者结合他们的才能和利益，互惠互利。该项目与“发展中国家科学项目”的目标相关，该项目旨在通过科学信息、思想、技能和技术的交流以及在互利问题上的合作，提高美国科学家和工程师与发展中国家同行之间的合作水平。本项目由美国国家科学基金（NSF）资助。EAR8817067，印尼政府和世界银行。

This proposal requests funds to permit Dr. Yehuda Bock, Scripps Institution of Oceanography, University of California, San Diego, to pursue with Dr. Jacub Rais, Indonesian National Coordination Agency for Surveys and Mapping (BAKOSURTANAL), for 24 months, a study of the tectonics of the Indonesian archipelago, using measurements of the Global Positioning System (GPS). They will study deformation associated with oblique plate convergence in Sumatra. Specifically, they will examine the mechanism of decoupling of the oblique slip into normal subduction and shear slip on faults parallel to the convergent margin by measuring the deformation both southwest and northeast of the Sumatran fault zone. The long-range goal of this project is extend GPS measurements across the entire Indonesian archipelago, concentrating on specific tectonic problems such as the distribution and rates of slip associated with arc-continent collision in the Banda arc in eastern Indonesia. In the Indonesian region, many tectonic processes that result in mountain building, continental accretion, destruction of continents, displacement of ophiolites, development of subduction zones, arc polarity reversal, basin closure, etc. are now active. This project will provide U.S. scientists a unique opportunity to observe such phenomena. Because Indonesia lies in a zone of high seismicity and volcanic activity, monitoring of crustal deformations has potential humanitarian and economic value as well. The U.S. and Indonesian collaborators are highly respected scientists who have records of successful research in the field of this project. The present project will allow the collaborators to combine their talents and interests for mutual benefit. This project is relevant to the objectives of the Science in Developing Countries Program which seeks to increase the level of cooperation between U.S. scientists and engineers and their counterparts in developing countries through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit. Primary support for this project is provided by NSF Grant No. EAR8817067, the Indonesian government, and the World Bank.