M74/2 raw data of EM120 multibeam echosounder (bathymetry & beam time)@en

Between 07.10.2007 and 28.10.2007, bathymetric data was acquired in the Makran region during the R/V METEOR cruise M74/2. The subduction of the Eurasian plate beneath the Arab plate in the Makran Region is associated with continuous sediment input, active mud volcanism and fluid venting. The expedition was dedicated to the investigation of known seeps and the location of new venting sites. Furthermore, the scientists focused on the influence of extreme sediment thickness on the nature of vents and the relationship between local tectonics and spatial distribution of seeps. The multibeam echosounders (MBES) KONGSBERG SIMRAD EM120 and EM710 were utilized for large-scale mapping of vent-related structures on the seafloor. In order to visualize vent-related structures in the shallow subsurface, a deep-tow sidescan sonar, sediment echosounder and high resolution multichannel equipment were utilized. These acoustic methods were supplemented by video observations, gravity corer and multicorer samples, which yielded detailed information at many locations. […]2007年10月7日至2007年10月28日期间，科研考察船"流星号"（R/V METEOR）的M74/2航次在马克兰（Makran）海域获取了水深测量数据。马克兰海域存在欧亚板块俯冲到阿拉伯板块下方的构造活动，该活动与持续的沉积物输入、活跃的泥火山活动及流体喷溢现象紧密相关。本次航次的核心目标为对已知冷泉（seeps）开展调查，并定位新的流体喷溢点位。此外，科研人员重点研究了极端沉积物厚度对喷口（vents）特征的影响，以及局部构造活动与冷泉空间分布之间的关联。科考团队使用了康士伯西姆拉德（KONGSBERG SIMRAD）EM120与EM710型多波束测深系统（multibeam echosounders, MBES），用于海底喷溢相关构造的大尺度测绘。为实现浅地表喷溢相关构造的可视化，团队还搭载了深拖侧扫声呐、沉积物测深仪与高分辨率多道勘探设备。上述声学探测手段辅以视频观测、重力取样器（gravity corer）及多管取样器（multicorer）获取的样品，为众多观测点位提供了详实的一手数据。[…]