Underwater video and still images from the Browse basin (GA340/SOL5754)

Geoscience Australia undertook a marine survey of the Leveque Shelf (survey number SOL5754/GA0340), a sub-basin of the Browse Basin, in May 2013. This survey provides seabed and shallow geological information to support an assessment of the CO2 storage potential of the Browse sedimentary basin. The basin, located on the Northwest Shelf, Western Australia, was previously identified by the Carbon Storage Taskforce (2009) as potentially suitable for CO2 storage. The survey was undertaken under the Australian Government's National CO2 Infrastructure Plan (NCIP) to help identify sites suitable for the long term storage of CO2 within reasonable distances of major sources of CO2 emissions. The principal aim of the Leveque Shelf marine survey was to look for evidence of any past or current gas or fluid seepage at the seabed, and to determine whether these features are related to structures (e.g. faults) in the Leveque Shelf area that may extend to the seabed. The survey also mapped seabed habitats and biota to provide information on communities and biophysical features that may be associated with seepage. This research, combined with deeper geological studies undertaken concurrently, addresses key questions on the potential for containment of CO2 in the basin's proposed CO2 storage unit, i.e. the basal sedimentary section (Late Jurassic and Early Cretaceous), and the regional integrity of the Heywood Formation (the seal unit overlying the main reservoir).Underwater footage was collected from 49 stations, although quality varies between sites. Video files are located in folder 'SOL5754_TOWVID_VIDEOS'. Each avi file contains several video transects; the associated stations are noted in the file name. Real-time onboard video characterisations using the AIMS- TowedVid classification system are located in folder 'SOL5754_TOWVID_CSVs'.Still images are located in folder 'SOL5754_TOWVID_STILLS' with sub-folders named according to station number, followed by gear code (CAM=underwater camera system), then the deployment number. For example, 12CAM02 represents a video transect from station 12 that was the 2nd video transect of the survey.USBL (Ultra-short baseline) text files are located in folder 'SOL5754_USBL_FILES' and provide continuous navigational information on location, time (UTC) and depth of each video transect line.

澳大利亚地球科学局（Geoscience Australia）于2013年5月对布劳斯盆地（Browse Basin）的次级盆地——勒韦克陆架（Leveque Shelf）开展了海洋勘测（勘测编号：SOL5754/GA0340）。本次勘测旨在获取海底与浅层地质信息，以支撑布劳斯沉积盆地的二氧化碳封存潜力评估。该盆地位于澳大利亚西部西北陆架（Northwest Shelf），此前已被碳封存工作组（Carbon Storage Taskforce，2009年）认定为具备二氧化碳封存潜力的候选区域。本次勘测依托澳大利亚政府《国家二氧化碳基础设施计划》（National CO2 Infrastructure Plan, NCIP）开展，旨在识别距离主要碳排放源合理范围内、适用于二氧化碳长期封存的场址。

勒韦克陆架海洋勘测的核心目标为：搜寻海底过去或当前存在的气体或流体渗漏证据，并探明这些渗漏特征是否与勒韦克陆架区域可延伸至海底的构造（如断层）相关。此外，本次勘测还对海底生境与生物群进行了制图，以获取与渗漏相关的群落及生物物理特征相关信息。本研究结合同期开展的深层地质研究，旨在解答两大核心问题：一是该盆地拟议二氧化碳封存单元（即晚侏罗世至早白垩世基底沉积剖面）的二氧化碳封存容纳潜力，二是作为主力储层上覆盖层的希伍德组（Heywood Formation）的区域封闭完整性。

本次勘测共在49个站位采集了水下影像，但各站点的影像质量存在差异。视频文件存储于文件夹"SOL5754_TOWVID_VIDEOS"中，每个avi格式文件包含多条视频样带，相关站位信息已标注于文件名中。采用澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）拖曳视频分类系统开展的实时船载视频特征描述文件存储于文件夹"SOL5754_TOWVID_CSVs"中。

静态图像存储于文件夹"SOL5754_TOWVID_STILLS"，其子文件夹以站位编号、设备代码（CAM=水下摄像系统）、部署序号依次命名。例如，"12CAM02"代表站位12的第二条视频样带。超短基线（Ultra-short baseline, USBL）文本文件存储于文件夹"SOL5754_USBL_FILES"中，可提供每条视频样带的连续导航信息，包括位置、协调世界时（Coordinated Universal Time, UTC）时间与水深。