DTA-6000声学深拖系统在富钴结壳探测中的应用

富钴结壳作为一种潜在的海洋矿产资源逐渐引起人们的关注,研究发现海山微地形是影响富钴结壳分布的重要因素。DTA-6000声学深拖系统是我国具有自主知识产权的第一套深海拖曳观测系统,其最大工作深度6 000 m,该设备上安装的高分辨率测深侧扫声纳和浅地层剖面仪能够分别获得高分辨率的海底地形地貌和浅地层剖面。它的测深覆盖范围600 m,侧扫覆盖范围800 m。声学深拖系统因其高效和价格优势,被列为富钴结壳资源调查的常规设备。大洋29航次中,DTA-6000声学深拖系统在采薇海山完成2条测线共约50 km海山斜坡的探测,获得了高分辨率的地形地貌数据和浅地层剖面数据。介绍DTA-6000声学深拖系统及其在富钴结壳探测中的应用,并对探测结果进行了分析。

APPLICATION OF DTA-6000 ACOUSTIC DEEP-TOW SYSTEM TO COBALT-RICH CRUST INVESTIGATION

As a kind of potential mineral resources in the ocean,cobalt-rich crusts have attracted people's attention gradually. The study demonstrates that the small-scale submarine relief is an important factor affecting the distribution of cobalt-rich crusts. DTA-6000 acoustic deep-tow system is the first set of towing deepwater observation system with independent intellectual property rights by China. Its maximum working depth is as deep as 6000 meters. The high-resolution bathymetric sidescan sonar and sub-bottom profile installed on DTA-6000 system can get high resolution submarine microrelief features and sub-bottom profiles. The sounding coverage is 600 meters,the side scanning coverage is 800 meters. The acoustic deep-tow system is applied for cobalt-rich crusts resource investigation as a conventional device due to its efficiency and low cost. In the 29th cruise, the DTA-6000 finished two survey lines with a total length about 50 km on the slope of MA seamount. This paper introduces the application of DTA-6000 acoustic deep-tow system for the investigation of cobalt-rich crusts, and the acquired results are analyzed.