Ocean bottom seismometer (OBS) data off South Island, New Zealand, acquired during R/V Maurice Ewing survey EW9601 (1996)

This cruise was part of a joint US-New Zealand 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. This joint US-NZ investigation of continental deformation at convergent plate boundaries was known as the South Island GeopHysical Transection (SIGHT) project. MCS and OBS/OBH data were collected on the west (Tasman Sea) side and east (Pacific Ocean) side of South Island. At the end of the cruise OBS/OBH and SCS data were collected off Kakanui Point just south of Timaru as part of the Southern Cross Anisotropy Survey. One of the objectives was to improve understanding of continental deformation at convergent plate boundaries by using marine onshore/offshore seismic techniques to provide a detailed image of the plate boundary from both sides. Funded by NSF grant # EAR-9418530 and the Public Good Service Fund, Ministry of Research, Science

本次巡航是美国-新西兰联合开展的多阶段地壳尺度研究的一部分，该研究聚焦于新西兰南岛中部的南部阿尔卑斯造山带，并向岛屿两侧延伸至海洋。这一联合美新调查，针对汇聚板块边界的大陆变形，被称为南岛地球物理横截面（SIGHT）项目。在西兰岛的西侧（塔斯曼海）和东侧（太平洋）收集了多波束测深系统（MCS）和海洋底部地震观测（OBS/OBH）数据。在巡航结束之际，作为南方十字星各向异性调查的一部分，于蒂马鲁以南的卡卡努伊角附近收集了多波束测深系统（OBS/OBH）和船载地震计（SCS）数据。其中一个目标是通过运用海上和陆上地震技术，提供从两侧对板块边界进行详细成像，以增进对汇聚板块边界大陆变形的理解。该项目由美国国家科学基金会（NSF）资助编号为EAR-9418530，以及新西兰研究、科学部公共福祉服务基金资助。