Sediment Data for Lord Howe Island Shelf

Geoscience Australia carried out a marine survey on Lord Howe Island shelf (NSW) in 2008 (SS06-2008) to map seabed bathymetry and characterise benthic environments through co-located sampling of surface sediments and infauna, rock coring, observation of benthic habitats using underwater towed video, and measurement of ocean tides and wave-generated currents. Sub-bottom profile data was also collected to map sediment thickness and shelf stratigraphy. Data and samples were acquired using the National Facility Research Vessel Southern Surveyor. Bathymetric data from this survey was merged with other pre-existing bathymetric data (including LADS) to generate a grid covering 1034 sq km. As part of a separate Geoscience Australia survey in 2007 (TAN0713), an oceanographic mooring was deployed on the northern edge of Lord Howe Island shelf. The mooring was recovered during the 2008 survey following a 6 month deployment.Seabed sediment samples were collected by a Smith McIntyre grab at a total of 36 locations (see Brooke et al. 2010). The full sample set represents 16 sampling stations, with multiple (2 or 3) samples taken at 10 of these stations.澳大利亚地球科学局（Geoscience Australia）于2008年针对豪勋爵岛陆架（Lord Howe Island shelf，新南威尔士州）开展了编号为SS06-2008的海洋科考，旨在通过同步采集表层沉积物（surface sediments）与底内生物（infauna）样品、开展岩石岩芯钻探（rock coring）、利用水下拖曳视频（underwater towed video）观测底栖生境，以及测量海洋潮汐与波浪生成流，完成海底水深地貌（seabed bathymetry）制图并表征底栖环境（benthic environments）特征。本次科考同时采集了亚底剖面数据（sub-bottom profile data），以绘制沉积物厚度与陆架地层（shelf stratigraphy）分布图。所有数据与样品均通过国家设施研究船（National Facility Research Vessel）“南方考察者号”（Southern Surveyor）获取。本次科考获取的水深数据与其他已有水深数据集（包括LADS）融合后，生成了覆盖1034平方千米的格网数据。作为澳大利亚地球科学局2007年另一项科考（航次编号TAN0713）的一部分，研究人员在豪勋爵岛陆架北缘部署了一套海洋学锚系浮标（oceanographic mooring），该浮标在完成6个月的部署后，于2008年的本次科考中被回收。研究人员共使用Smith McIntyre采泥器（Smith McIntyre grab）在36个站位采集了海底沉积物样品（详见Brooke等人2010年的研究成果），完整样品集涵盖16个采样站点，其中10个站点采集了2或3份样品。