Collaborative Research: U.S. - ROC Deep Seismic Imaging Study of the Taiwan Arc-Continent Collision

[9417415]伦德伯格弧-大陆碰撞的研究为造山过程和大陆增生提供了有价值的见解。台湾造山带是这一过程的现代例证，为研究陆上暴露的古造山带提供了重要的模式。台湾东南部沿碰撞缝合线所测得的隆升速度是世界上最快的之一，但对于该地区之下的地壳结构，以及台湾南部近海从俯冲到碰撞的关键转变过程中的隆升机制，却知之甚少。本项目将提供详细的新资料，以检视台湾的地壳结构和碰撞过程。需要获取的数据包括来自近海地区的多通道地震反射和地震折射数据，以及陆地上的地壳折射同步测量数据。在台湾进行这种研究的一个主要优势是，沿着碰撞带向南移动，可以看到传播碰撞的逐渐年轻的阶段。因此，碰撞过程的细节可以从进化的角度来考察。该项目的结果将对海洋钻井计划的钻井计划至关重要。这是一个由美国四个机构的科学家和国立台湾大学海洋学研究所支持的合作项目。＊＊＊

9417415 Lundberg Studies of arc-continent collisions provide valuable insights into orogenic processes and continental accretion. The Taiwan orogenic belt provides a modern example of this process, which has served as an important model for studying ancient orogens now exposed on land. Uplift rates measured along the collision suture in southeastern Taiwan are among the fastest in the world, yet little is known about the crustal structure beneath this region or the mechanisms responsible for uplift at the critical transition from subduction to collision located in the offshore to the south of Taiwan. The present project will provide detailed new information with which to examine Taiwan crustal structure and the collision process. Data to be acquired include multi-channel seismic reflection and seismic refraction data from the offshore region, as well as simultaneous crustal refraction measurements on land. A major advantage to undertaking such a study in Taiwan is that progressively younger stages of the propagating collision can be viewed by moving southward along the collision zone. Thus, the detailed aspects of the collision process can be examined from an evolutionary perspective. Results from the project will be critical in planning drilling by the Ocean Drilling Program. This is a cooperative project supported by scientists at four U.S. institutions and the Institute of Oceanography of the National Taiwan University. ***