Synoptic Fine-Scale Survey of the Seafloor

海底综合精细勘测

• 批准号: 9504830
• 负责人: Christian de Moustier
• 金额: $ 25.38万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9504830&HistoricalAwards=false
• 关键词: Synoptic; Fine; Scale; Survey; Seafloor

9504830 de Moustier The Scripps Institution of Oceanography will will undertake an instrument develoipment project to build a multi-sensor, digital Deep Tow vehicle capable of fine-scale multibeam swath mapping and acoustic backscatter imaging near the seafloor to a 6000 meter depth. The system will be configured to operate with either coaxial or fiber-optic tow cables and be capable of deploying sensor packages as science requirements dictate. The plan is to integrate a pair of 110 kHz side-looking sonars, a 4 kHz sub-bottom profiler, a 40 kHz obstacle avoidance sonar, a 12 kHz navigation sonar, a 23.5 kHz up-looking sonar, a CTD, a transmissometer, a magnetometer and a complement of still and TV cameras onto an existing towed vehicle). This high resolution tool will be used to study geological seafloor phenomena such as crustal accretion processes, small-scale abyssal sediment processes (sediment wave amplitude, asymmetry, wavelength and orientation), scale dependence of seafloor topography, and seafloor acoustic backscattering. Ultimately, the data will provide a base for better understanding the relationship between the magmatic and tectonic processes that control the ridge system and hydrothermal venting.

9504830 De Moustier斯克里普斯海洋研究所将进行一项仪器开发项目，以建造一种多传感器、数字深海拖车，能够在海底附近进行精细的多波束条带测绘和声学背向散射成像，深度可达6,000米。该系统将配置为使用同轴电缆或光纤拖缆运行，并能够按照科学要求部署传感器组件。该计划是将一对110千赫的侧视声纳、一个4千赫的海底剖面仪、一个40千赫的避障声纳、一个12千赫的导航声纳、一个23.5千赫的仰视声纳、一个CTD、一个透射计、一个磁力计以及一组静止和电视摄像机安装到现有的拖车上。这一高分辨率工具将用于研究海底地质现象，如地壳吸积过程、小尺度深海沉积过程(沉淀波的幅度、不对称性、波长和方位)、海底地形的尺度依赖性以及海底声波后向散射。最终，这些数据将为更好地理解控制山脊系统和热液喷发的岩浆和构造过程之间的关系提供基础。