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

该项目涉及对横跨新西兰南岛中部的南阿尔卑斯造山带进行为期4年的全面多阶段地壳尺度研究，该造山带一直延伸到岛屿两侧的海洋。这项研究由两个主要的样带组成- -沿兰吉塔塔河的北部初级样带将进行高分辨率的全面实验工作，而南部样带将在总地壳尺度上运行。多样化的地震工作是提出的研究的本质。南阿尔卑斯造山带的独特构造——一条相对较窄（160公里）的狭长陆地，两侧都是海洋——允许主要研究人员使用几种不同但互补的地震方法。该项目分为5个阶段：第一阶段：沿着主样带绘制南岛陆上共深点反射剖面；o第二阶段：在南岛的两个横断面上绘制折射/广角反射剖面；o第三阶段：被动地震学现场项目，包括记录本地、区域和远震事件的样带；o第4阶段：对两个样带的岩石物理、重力和大地电磁进行辅助研究；o第五阶段：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. ***