Towards a High Resolution, Three-component Velocity Field for the Central Andes

为安第斯山脉中部建立高分辨率、三分量速度场

• 批准号: 0510719
• 负责人: Matthew Pritchard
• 金额: $ 32.83万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0510719&HistoricalAwards=false
• 关键词: Towards; Resolution; Three; component; Velocity

Towards a high resolution, three-component velocity field for the central AndesThis study will use space geodetic measurements (GPS and InSAR) tocreate a high spatial resolution, three-component map of crustalvelocity in the central Andes during the past decade. The primarygoal is to image possible along-strike variations in the inter-seismicdeformation field. While the inter-seismic deformation field isinteresting in its own right, and can be used to determine which partsof the subduction interface are locked (and might rupture in futureearthquakes), the objective is to model this deformation so that itcan be removed. This study seeks to isolate subtle low-amplitudedeformation, including: 1) Bulk post-seismic relaxation followingrecent subduction zone earthquakes. 2) Aseismic motion on shallowcrustal faults related to long-term mountain-building. 3) Magmamovements in deep sub-crustal reservoirs and at low rates in shallowchambers. This study will use methods similar to those of previousstudies (e.g., Peltzer et al., 2001, Wright et al., 2001), but willincrease the amount of data and spatial coverage by 1-2 orders ofmagnitude, from the 10's of scenes of InSAR data used in previousstudies to nearly 1000 scenes.This study will help to better characterize hazards from earthquakesin two different environments -- subduction zones and within thecontinents. This project will also extend our previous surveys ofhundreds of volcanoes for active deformation that could indicatemagmatic movements and the need for further assessment of eruptivehazard. The software that will be developed in this study will becomepublicly available. This study will involve the training of graduateand undergraduate students, and will support an early careerscientist.

在高分辨率的高分辨率上，中央和研究研究的三分量速度场将使用空间测量值（GPS和INSAR）在过去十年中的中央安第斯山脉中造成高空间分辨率，三个成分的地壳图。 主要目标是图像沿跨性变化领域的撞击变化形象。 虽然跨性变形场本身就是植物的，并且可以用来确定俯冲界面的哪些部分被锁定（并且可能在未来的次数中破裂），但目的是建模该变形，以便可以将其删除。这项研究旨在隔离微妙的低扩张形式，包括：1）阳性俯冲区地震后散装后的震中放松。 2）与长期建造有关的浅层断层上的无性运动。 3）在深层地壳储层中的岩浆和浅口山脉的较低速率。 这项研究将使用类似于以前的研究的方法（例如Peltzer等，2001，Wright等，2001），但是从10个场景来看，将以1-2级的数据和空间覆盖的量减少1-2个命令的命令。在近1000个场景的上述研究中使用的INS数据。这项研究将有助于更好地表征地震危害的两个不同环境 - 俯冲带和涉及到危险。 该项目还将扩展我们以前对数百座火山的调查，以进行主动变形，这可能表明运动型运动，并需要进一步评估爆发性危害。 将在本研究中开发的软件将成为公开可用的。这项研究将涉及毕业的本科生的培训，并将支持早期的职业学家。