Lord Howe Rise Marine Seismic Survey 2016 (GA-0354/ KR1605) Bathymetry grids

This dataset contains bathymetry products from the Lord Howe Rise 2D Seismic Survey undertaken by Geoscience Australia (GA) and the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) during the period from 17 March to 16 May 2016 onboard the RV Kairei (Survey KR1605). The Lord Howe Rise (LHR) is a submerged plateau that extends from southwest New Caledonia to the west of New Zealand. Much of the LHR lies within the Australian marine jurisdiction at water depths of 1000-3000m. The Commonwealth conducted a scientific seismic survey over the Lord Howe Rise in 2016 in collaboration with JAMSTEC. This collaboration contributes to a larger research proposal submitted to the International Ocean Discovery Program (IODP) that would provide the first deep stratigraphic record for the Cretaceous Eastern Gondwana Margin. The IODP proposal, if funded, is to drill a deep stratigraphic well to a depth of 2-3 km below the seabed, possibly in 2020. In order to select the drill sites, GA and JAMSTEC are conducting site assessments that involve a seismic survey in 2016 and a geotechnical survey in 2017. Multibeam bathymetry data were acquired during the survey covering an area of 62,360 km2. Eight bathymetry grids of 50 to 80m resolution were produced using the shipborne 12 KHz sonar system.This dataset is not to be used for navigational purposes.

本数据集收录了澳大利亚地质调查局（Geoscience Australia, GA）与日本海洋地球科学技术厅（Japan Agency for Marine-Earth Science and Technology, JAMSTEC）于2016年3月17日至5月16日期间，搭乘Kairei号海洋研究船（RV Kairei，航次KR1605）开展的豪勋爵海隆（Lord Howe Rise, LHR）二维地震调查所获取的水深测量（bathymetry）产品。豪勋爵海隆（LHR）是一处水下高原，其范围从新喀里多尼亚西南部延伸至新西兰以西海域。该海隆的绝大部分区域处于澳大利亚海洋管辖海域内，水深区间为1000至3000米。澳大利亚联邦于2016年与JAMSTEC合作，在豪勋爵海隆海域开展了科学地震调查。此次合作是提交至国际大洋发现计划（International Ocean Discovery Program, IODP）的大型研究提案的核心组成部分，该提案旨在获取白垩纪东冈瓦纳边缘的首份深层地层记录。若该IODP提案获得资助，研究团队有望于2020年在海底以下2至3千米处钻取一口深层地层井。为选定钻探点位，GA与JAMSTEC正推进点位评估工作，该工作涵盖2016年的地震调查与2017年的岩土勘测。本次调查共获取了覆盖面积达62360平方千米的多波束水深测量（multibeam bathymetry）数据。研究团队借助船载12千赫兹声呐系统，生成了8幅分辨率介于50至80米的水深测量网格数据。本数据集不得用于航行导航用途。