Vlaming Sub-Basin Marine Environmental Survey (GA-0334/S. Supporter GP1373)(NCIP Program) - Sidescan grids

Geoscience Australia undertook a marine survey of the Vlaming Sub-basin in March and April 2012 to provide seabed and shallow geological information to support an assessment of the CO2 storage potential of this sedimentary basin. 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 Vlaming Sub-basin is located offshore from Perth, Western Australia, and was previously identified by the Carbon Storage Taskforce (2009) as potentially highly suitable for CO2 storage. The principal aim of the Vlaming Sub-basin marine survey (GA survey number GA334) 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 Vlaming Sub-basin that may extend up to the seabed. The survey also mapped seabed habitats and biota in the areas of interest to provide information on communities and biophysical features that may be associated with seepage. This research addresses key questions on the potential for containment of CO2 in the Early Cretaceous Gage Sandstone (the basin's proposed CO2 storage unit) and the regional integrity of the South Perth Shale (the seal unit that overlies the Gage Sandstone). This dataset comprises sidescan grids.

澳大利亚地球科学局（Geoscience Australia）于2012年3—4月对弗拉明次盆地（Vlaming Sub-basin）开展海洋勘测，旨在获取海底及浅层地质资料，为评估该沉积盆地的二氧化碳封存潜力提供支撑。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）实施，旨在筛选距离主要二氧化碳排放源较近、适配长期二氧化碳封存的场址。弗拉明次盆地（Vlaming Sub-basin）地处西澳大利亚州珀斯近海，此前碳封存特别工作组（Carbon Storage Taskforce，2009年）已判定其具备极高的二氧化碳封存适配性。本次弗拉明次盆地海洋勘测（澳大利亚地球科学局勘测编号GA334）的核心目标，一是搜寻海底过往及现存的气体或流体渗漏证据，二是判定此类渗漏特征是否与盆地内可延伸至海底的构造（如断层）存在关联。勘测同时对目标海域的海底生境与生物群落开展了制图工作，以获取与渗漏现象相关的生物群落及生物物理特征资料。本研究聚焦两大核心科学问题：其一为早白垩世盖奇砂岩（Early Cretaceous Gage Sandstone，该盆地拟议的二氧化碳封存储层）的二氧化碳封存潜力；其二为覆于盖奇砂岩之上的南珀斯页岩（South Perth Shale，盖层）的区域完整性。本数据集包含侧扫声呐栅格数据（sidescan grids）。