SeaMARC II and Seismic Reflection of the Taiwan Collision

SeaMARC II 和台湾碰撞的地震反射

• 批准号: 8911690
• 负责人: Donald Reed
• 金额: $ 6.48万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-01 至 1991-05-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911690&HistoricalAwards=false
• 关键词: SeaMARC; II; Seismic; Reflection; Taiwan

The accretion of island arcs onto continental margins is an important mechanism for continental growth, and explains much of the complexity of terranes surrounding the Pacific Ocean. Drs. Lundberg, Reed and Shor will survey a collision in progress immediately south of Taiwan, where an arc system ofthe Phillipine Sea is colliding with the China main land. Cruise plans include 26 days of SeaMarcII swath mapping, digitalsingle-channel seismics, 3.5 KHz echo sounding, gravity and magnetic measurements, plus 3 days of piston coring. Immediate objectives are to map deep (seismic) and shallow (topographic) structural features, sediment lithofacies and sediment transport systems across the collision zone. Because of the oblique natureof the collisional front, along-strike comparisons provide"snapshot" views of the evolution of arc-continent collisions. Consequently, studies will include spatial and temporal comparisons of the effects of over burden and sediment distribution.

岛弧在大陆边缘的增生是大陆生长的重要机制，并解释了太平洋周围地形的复杂性。Drs。伦德伯格，里德和肖尔将调查台湾南部正在进行的碰撞，菲律宾海的一个弧形系统正在与中国大陆碰撞。巡航计划包括26天的SeaMarcII测绘、数字单通道地震、3.5 KHz回波探测、重力和磁场测量，以及3天的活塞取心。直接的目标是绘制深（地震）和浅（地形）构造特征、沉积岩相和跨越碰撞带的沉积物运输系统。由于碰撞锋面的倾斜性质，沿走向比较提供了弧-大陆碰撞演化的“快照”视图。因此，研究将包括对过负荷和沉积物分布影响的空间和时间比较。