Collaborative Research: TAIGER's Tale: Tectonics of Subduction to Collision

合作研究：TAIGER 的故事：俯冲到碰撞的构造

• 批准号: 1009691
• 负责人: David Okaya
• 金额: $ 24.72万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-10-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1009691&HistoricalAwards=false
• 关键词: Collaborative; Research; TAIGER; Tale; Tectonics

The TAIGER (Taiwan Integrated Geodynamics Research) project is a joint USA-Taiwan program that seeks to model the complex collision processes and the tectonic development of Taiwan, based on extensive observation. Funded by the NSF Continental Dynamics Program and by Taiwan's National Science Council and involving investigators at SUNY/Binghamton, UTIG, USC, Cornell, and Wisconsin, this project has acquired more than twice as much data as originally proposed due to synergistic contributions by Taiwan scientists and Taiwanese government science funding. From FY2006-2009, deployments of seismic instruments on land (IRIS) and at ocean-bottom (OBSIP) maximized the recording of local events and teleseisms, as well as artificial sources specially set off for TAIGER, in order to obtain high resolution 3-D images. To map the areas around Taiwan the PIs were able to use the NSF-supported research ship, the R/V Langseth, to create seismic waves that were recorded by a 6-km long streamer and also ocean-bottom and land recorders. These seismic and magnetotelluric profiles as well as petrologic lab data are currently being analyzed. TAIGER project data combined with geodynamics methods will be used to test a set of existing tectonic models that range from a thin skinned model, in which subduction of continental Eurasian mantle and lower crust is separated from a deforming crustal wedge by a plate boundary decollement, from a thick skinned model, where deformation of crust and mantle occurs within a vertically contiguous system, with progressive thickening of continental mantle beneath the core of the mountain belt.The current project (TAIGER?s TALE), will expand on thier initial studies to carry out in-depth and advanced studies using the extensive TAIGER data volumes (no new data will be acquired). This work will lead to significant advances in understanding deformational processes associated with the evolution of Taiwan due to plate collision. Studies will focus primarily on seismological analyses to obtain physical properties and rheological indicators as well as the integrative ties with geodynamical modeling efforts. The over-arching strategy is to take advantage of the unique aspects of the acquired data sets, the tectonic environment, and the diverse and complementary participating/collaborating personnel. They will perform their analyses of various data sets in such a way that higher frequency/higher resolution results are nested in the context of broader scale results. They will make extensive use of ?crossover? seismological data sets recorded during TAIGER (active sources collected by passive-source arrays, and earthquakes collected in active-source arrays). Also, analysis/interpretation of these data will be closely tied to geodynamic modeling.

TAIGER（台湾综合地球动力学研究）项目是美国和台湾的联合项目，旨在基于广泛的观测来模拟复杂的碰撞过程和台湾的构造发展。 该项目由美国国家科学基金会大陆动力学计划和台湾国家科学委员会资助，并由纽约州立大学宾厄姆顿分校、UTIG、南加州大学、康奈尔大学和威斯康星州的研究人员参与，由于台湾科学家和台湾政府科学资助的协同贡献，该项目已获取的数据量是最初提议的两倍多。 从2006-2009财年，在陆地（IRIS）和海底（OBSIP）地震仪器的部署最大限度地记录了当地事件和远震，以及专门为TAIGER发射的人工震源，以获得高分辨率的3D图像。 为了绘制台湾周边地区的地图，PI 能够使用 NSF 支持的研究船 R/V Langseth 来产生地震波，并由 6 公里长的拖缆以及海底和陆地记录仪记录。 目前正在分析这些地震和大地电磁剖面以及岩石学实验室数据。 TAIGER项目数据与地球动力学方法相结合，将用于测试一系列现有的构造模型，包括薄皮模型（其中欧亚大陆地幔和下地壳俯冲通过板块边界滑脱与变形的地壳楔形部分分开）和厚皮模型（其中地壳和地幔的变形发生在垂直连续的系统内，并且大陆地幔在其下方逐渐增厚）。 目前的项目（TAIGER的TALE）将在其初步研究的基础上进行扩展，利用广泛的TAIGER数据量（不会获取新数据）进行深入和高级的研究。这项工作将在理解与板块碰撞导致的台湾演化相关的变形过程方面取得重大进展。研究将主要集中在地震学分析上，以获得物理特性和流变指标以及与地球动力学建模工作的综合联系。总体策略是利用所获取的数据集、构造环境以及多样化和互补的参与/合作人员的独特方面。他们将以更高频率/更高分辨率结果嵌套在更广泛规模结果的背景中的方式对各种数据集进行分析。他们将广泛使用“交叉”？ TAIGER期间记录的地震数据集（由被动源阵列收集的主动源，以及由主动源阵列收集的地震）。 此外，这些数据的分析/解释将与地球动力学建模密切相关。