Organic Geochemistry of Core Sediments - Caswell Sub-basin, Browse Basin Marine Survey (GA0345/GA0346/TAN1411)

Geoscience Australia (GA) conducted a marine survey (GA0345/GA0346/TAN1411) of the north-eastern Browse Basin (Caswell Sub-basin) between 9 October and 9 November 2014 to acquire seabed and shallow geological information to support an assessment of the CO2 storage potential of the basin. The survey, undertaken as part of the Department of Industry and Science's National CO2 Infrastructure Plan (NCIP), aimed to identify and characterise indicators of natural hydrocarbon or fluid seepage that may indicate compromised seal integrity in the region. The survey was conducted in three legs aboard the New Zealand research vessel RV Tangaroa, and included scientists and technical staff from GA, the NZ National Institute of Water and Atmospheric Research Ltd. (NIWA) and Fugro Survey Pty Ltd. Shipboard data (survey ID GA0345) collected included multibeam sonar bathymetry and backscatter over 12 areas (A1, A2, A3, A4, A6b, A7, A8, B1, C1, C2b, F1, M1) totalling 455 km2 in water depths ranging from 90 - 430 m, and 611 km of sub-bottom profile lines. Seabed samples were collected from 48 stations and included 99 Smith-McIntyre grabs and 41 piston cores. An Autonomous Underwater Vehicle (AUV) (survey ID GA0346) collected higher-resolution multibeam sonar bathymetry and backscatter data, totalling 7.7 km2, along with 71 line km of side scan sonar, underwater camera and sub-bottom profile data. Twenty two Remotely Operated Vehicle (ROV) missions collected 31 hours of underwater video, 657 still images, eight grabs and one core.This catalogue entry refers to geochemical data on piston core sediments collected during the GA0345/TAN1411 marine survey in the Browse Basin. These include concentrations of interstitial gases (C1 to C5, CO2) and high-molecular weight hydrocarbons.

澳大利亚地球科学局（Geoscience Australia，GA）于2014年10月9日至11月9日对布劳斯盆地（Browse Basin）东北部的卡斯韦尔次盆（Caswell Sub-basin）开展了海洋调查（航次编号GA0345/GA0346/TAN1411），旨在获取海底与浅层地质数据，以支撑该盆地二氧化碳封存潜力的评估工作。本次调查作为澳大利亚工业与科学部国家二氧化碳基础设施计划（National CO2 Infrastructure Plan，NCIP）的组成部分，目标是识别并表征该区域内可能指示盖层完整性受损的天然烃类或流体渗漏指标。调查由新西兰研究船“唐加罗阿”号（RV Tangaroa）分三个航段实施，参与单位包括澳大利亚地球科学局、新西兰国家水与大气研究所（National Institute of Water and Atmospheric Research Ltd.，NIWA）以及Fugro Survey Pty Ltd.的科研人员与技术人员。本次船载调查（航次编号GA0345）采集的数据涵盖12个作业区域（A1、A2、A3、A4、A6b、A7、A8、B1、C1、C2b、F1、M1）的多波束测深与后向散射数据，覆盖总面积达455平方千米，作业水深区间为90至430米，同时完成了611千米的浅地层剖面测线作业。本次调查共布设48个采样站位，采集海底样品共计99个Smith-McIntyre采泥器样品与41个活塞岩芯样品。自主水下航行器（Autonomous Underwater Vehicle，AUV，航次编号GA0346）采集了总面积7.7平方千米的高分辨率多波束测深与后向散射数据，同时完成了71千米侧扫声呐、水下摄像与浅地层剖面测线作业。22次遥控水下机器人（Remotely Operated Vehicle，ROV）作业累计采集了31小时水下视频、657张静态图像、8个沉积物样品以及1个岩芯样品。本目录条目所涉及的数据，为布劳斯盆地GA0345/TAN1411海洋调查期间采集的活塞岩芯沉积物地球化学数据，包括间隙气体（C1至C5烃类及二氧化碳）与高分子量烃类的浓度数据。