Frontier basins of the west Australia continental margin: Major and trace elements of seabed sediments.

Geoscience Australia marine reconnaissance survey GA2476 to the west Australian continental margin was undertaken as part of the Australian Government's Offshore Energy Program between 25 October 2008 and 19 January 2009 using the German research vessel RV Sonne. The survey acquired geological, geophysical, oceanographic and biological data over poorly known areas of Australia's western continental margin in order to improve knowledge of frontier sedimentary basins and marginal plateaus, and allow assessment of their petroleum prospectivity and environmental significance. Four key areas were targeted: the Zeewyck and Houtman sub-basins (Perth Basin), the Cuvier margin (northwest of the Southern Carnarvon Basin), and the Cuvier Plateau (a sub-feature of the Wallaby Plateau). These areas were mapped using multi-beam sonar, shallow seismic, magnetics and gravity. Over the duration of the survey a total of 229,000 km2 (26,500 line-km) of seabed was mapped with the multibeam sonar, 25,000 line-km of digital shallow seismic reflection data and 25,000 line-km of gravity and magnetic data. Sampling sites covering a range of seabed features were identified from the preliminary analysis of the multi-beam bathymetry grids and pre-existing geophysical data (seismic and gravity). A variety of sampling equipment was deployed over the duration of the survey, including ocean floor observation systems (OFOS), deep-sea TV controlled grab (BODO), boxcores, rock dredges, conductivity-temperature depth profilers (CTD), and epibenthic sleds. Different combinations of equipment were used at each station depending on the morphology of the seabed and objectives of each site. A total of 62 stations were examined throughout the survey, including 16 over the Houtman Sub-basin, 16 over the Zeewyck Subbasin, 13 in the Cuvier margin, 12 over the Cuvier Plateau and four in the Indian Ocean. This dataset comprises total chlorin concentrations and chlorin indices measured on the upper 2 cm of seabed sediments. For more information: Daniell, J., Jorgensen, D.C., Anderson, T., Borissova, I., Burq, S., Heap, A.D., Hughes, M., Mantle, D., Nelson, G., Nichol, S., Nicholson, C., Payne, D., Przeslawski, R., Radke, L., Siwabessy, J., Smith, C., and Shipboard Party, (2010). Frontier Basins of the West Australian Continental Margin: Post-survey Report of Marine Reconnaissance and Geological Sampling Survey GA2476. Geoscience Australia, Record 2009/38, 229pp

澳大利亚地质调查局（Geoscience Australia）主持的西澳大利亚大陆边缘海洋踏勘调查GA2476，系澳大利亚政府近海能源计划的组成部分，于2008年10月25日至2009年1月19日间依托德国科考船RV Sonne号执行。本次调查在澳大利亚西部大陆边缘的认知空白区域采集了地质、地球物理、海洋学与生物学数据，旨在增进对前沿沉积盆地及边缘高原的认知，并为评估其油气勘探潜力与环境重要性提供支撑。

本次调查选定四大核心研究区域：Zeewyck次盆（Zeewyck Sub-basin）与Houtman次盆（Houtman Sub-basin，隶属于珀斯盆地（Perth Basin））、Cuvier陆缘（Cuvier Margin，南卡那封盆地（Southern Carnarvon Basin）西北部）以及Cuvier高原（Cuvier Plateau，Wallaby高原（Wallaby Plateau）的次级地貌单元）。调查区域采用多波束声呐、浅层地震、磁法与重力法开展测绘工作。

本次调查累计完成22.9万平方千米（2.65万测线千米）的海底多波束测绘，采集了2.5万测线千米的数字浅层地震反射数据，以及2.5万测线千米的重力与磁法数据。基于多波束水深栅格数据与已有地球物理数据（地震与重力数据）的初步解译，研究人员划定了覆盖多种海底地貌特征的采样站位。

调查期间部署了多类采样设备，包括海底观测系统（OFOS, Ocean Floor Observation Systems）、深海电视控制抓斗采样器（BODO）、箱式岩心采样器、岩石拖网采样器、温盐深剖面仪（CTD）以及底上生物采样拖网。各站位需根据海底地貌与调查目标选用适配的设备组合。

本次调查累计完成62个站位的实地工作，其中Houtman次盆16个、Zeewyck次盆16个、Cuvier陆缘13个、Cuvier高原12个，印度洋海域4个。

本数据集包含采自海底表层2厘米沉积物中的总氯浓度与氯指数测试数据。

更多信息可参考：Daniell, J.、Jorgensen, D.C.、Anderson, T.、Borissova, I.、Burq, S.、Heap, A.D.、Hughes, M.、Mantle, D.、Nelson, G.、Nichol, S.、Nicholson, C.、Payne, D.、Przeslawski, R.、Radke, L.、Siwabessy, J.、Smith, C. 以及全体科考队员，(2010)。《西澳大利亚大陆边缘前沿盆地：海洋踏勘与地质采样调查GA2476结题报告》。澳大利亚地质调查局（Geoscience Australia），报告编号2009/38，共计229页。