Geophysical Investigation of a Modern Continent-Continent Collisional Orogen: The Southern Alps, New Zealand

9418530亨耶该项目涉及对新西兰南岛中部的南阿尔卑斯山造山带进行为期4年的多期地壳规模的综合研究，该造山带延伸至岛两侧的海域。这项研究由两个主要样点组成--沿朗吉塔河的一个北部主要样点将在高分辨率下进行充分的实验工作，另一个南部样点将在总地壳尺度上运行。地震工作的多样性是拟议研究的精髓。南阿尔卑斯山造山带是一片相对狭窄(160公里)的陆地，两侧都有海洋，这一独特的构造使首席调查人员能够使用几种不同的、但相互补充的地震方法。该项目分为5个阶段：o阶段1：沿主要断面横跨南岛的陆上CDP(公共深度点)反射剖面；o阶段2：两个断面上横跨南岛的折射/广角反射剖面；o阶段3：包括两个断面的被动地震学野外计划，记录局部、区域和远震事件；O阶段4：两个断面上的岩石物理、重力和大地电磁的辅助研究；o阶段5：区域综合和最终大地构造模型的发展。***

9418530 Henyey This project involves a comprehensive, 4-year multiphase crustal-scale study of the Southern Alpine orogen across the central South Island of New Zealand, extending out to sea on either side of the island. The study is composed of two major transects - a northern primary transect along the Rangitata River which will have a full experimental effort at high resolution and a southern transect which will be run on a gross-crustal scale. A diversity of seismic work is the essence of the proposed study. The unique configuration of the Southern Alps Orogen - a relatively narrow (160 km) strip of land with seas on either side - allows the Principal Investigators to use several different, yet complementary, seismic methods. The project is divided into 5 phases: o Phase 1: An onshore CDP (Common Depth Point) reflection profile across the South Island along the primary transect; o Phase 2: Refraction/wide angle reflection profiles across the South Island on both transects; o Phase 3: A passive seismology field program encompassing both transects recording local, regional, and teleseismic events; o Phase 4: Ancillary studies of petrophysics, gravity, and magnetotellurics across both transects; o Phase 5: Regional synthesis and the development of final geotectonic models. ***