基于ROV的近海底地形测量及其在马努斯盆地热液区的应用

发布时间：2019-02-11 14:59

【摘要】：针对重点的特殊深海研究区(如热液冷泉、洋中脊区域),在船载多波束数据获得研究区大面积地形资料的基础上,有必要选取典型深海小靶区进行高分辨率地形测量为进一步深入研究提供保障。根据船载多波束实测数据选取PACMANUS热液区作为靶区,基于长基线定位,利用"发现"ROV搭载多波束系统进行近海底全覆盖地形测量。结果表明,依托于船动力定位系统及差分GPS,长基线为ROV提供了可靠的高精度定位,使得近海底测量的地形数据分辨率数倍优于船载多波束测得的地形数据的分辨率。高分辨率地形清晰的显示了PACMANUS热液区锥形丘体等特殊微地形,与已发现的热液点和火山区有很好的对应。进一步分析发现,该区域活动的热液区主要发育于坡度大于30°斜坡上的地形突变区,其成因仍需深入研究。利用ROV搭载多波束近底测量是获取深海小靶区高分辨率地形的可靠途径和方法,有利于提高深海海底研究的针对性,将促进我国深海科学研究的发展。
[Abstract]:For special deep-sea research areas (such as hydrothermal cold springs, mid-ocean ridges), on the basis of large area topographic data obtained from shipborne multi-beam data, It is necessary to select typical deep-sea small targets for high resolution topographic survey to provide guarantee for further research. According to the measured data of shipborne multi-beam, the PACMANUS hydrothermal region is selected as the target area. Based on the long baseline location, the "Discovery" ROV is used to carry out the full coverage topographic survey of the near seabed with a multi-beam system. The results show that relying on the ship dynamic positioning system and the differential GPS, long baseline, it can provide reliable and accurate positioning for ROV, which makes the resolution of topographic data of near-seabed survey several times better than that of shipborne multi-beam topographic data. The high resolution topography clearly shows the special microtopography such as the conical mound in the PACMANUS hydrothermal region, which corresponds well with the discovered hydrothermal point and the fire mountain area. Further analysis shows that the active hydrothermal region in this area is mainly developed in the topographic catastrophe area with slope greater than 30 掳, and the cause of formation still needs to be further studied. Using ROV to carry multi-beam near-bottom survey is a reliable way and method to obtain high-resolution topography in deep sea small target area. It is helpful to improve the pertinence of deep-sea seabed research and will promote the development of deep-sea scientific research in China.
【作者单位】：中国科学院海洋研究所海洋地质与环境重点实验室;哈尔滨工程大学水声工程学院;
【基金】：中国科学院战略性先导科技专项(XDA11030301)
【分类号】：P229.1

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