Lord Howe Rise Marine Survey 2017 (GA-0363/ KR17-15C) 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 from8 of November 2017 to1stJanuary 2018 onboard the RV Kairei (Survey KR1715C). 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 2017 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 69,190 km2. Five bathymetry grids of 70 to 90m resolution were produced using the shipborne 12 KHz sonar system.This dataset is not to be used for navigational purposes.

本数据集包含由澳大利亚地质科学局（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2017年11月8日至2018年1月1日期间，在“凯利号”（RV Kairei）科考船KR1715C航次执行的豪勋爵海隆2D地震调查中获取的水深测量产品。豪勋爵海隆（Lord Howe Rise，LHR）是一处淹没高原，其范围从新喀里多尼亚西南部延伸至新西兰西侧，大部分区域位于澳大利亚海洋管辖海域内，水深介于1000至3000米之间。澳大利亚联邦于2017年与JAMSTEC合作开展了针对豪勋爵海隆的科学地震调查，此次合作隶属于一项提交至国际大洋发现计划（International Ocean Discovery Program，IODP）的大型研究提案，该提案旨在获取白垩纪东冈瓦纳大陆边缘的首个深层地层记录。若该IODP提案获得资助，计划将于2020年前后钻取一口海底以下2至3千米的深层地层钻井。为选定钻井点位，GA与JAMSTEC正开展点位评估工作，相关工作涵盖2016年的地震调查与2017年的岩土勘测。本次调查期间共获取了覆盖面积达69190平方千米的多波束水深测量数据，并依托船载12千赫兹声呐系统生成了5组分辨率为70至90米的水深网格数据。本数据集不得用于航行导航用途。