Multibeam water column data research in the Taixinan Basin: Implications for the potential occurrence of natural gas hyd
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Multibeam water column data research in the Taixinan Basin: Implications for the potential occurrence of natural gas hydrate Yilan Chen1, Jisheng Ding1*, Haiquan Zhang1, Qiuhua Tang1, Xinghua Zhou1, Xiaoyu Liu1 1 First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Received 1 February 2018; accepted 27 April 2018 © Chinese Society for Oceanography and Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract
A multi beam sonar survey is carried out in the continental slope of the Taixinan Basin to obtain submarine topographic and water column data. The data are processed to obtain water column images. Anomalous water column images, displaying plume characteristics, are found in gas hydrate enriched areas in the Taixinan Basin. This indicates the presence of natural gas resources in the Taixinan Basin. The multibeam sonar system is shown to provide an accurate and effective approach for detecting sub-sea gas hydrate. Key words: multibeam sonar, water column image, plume flow, Taixinan Basin, gas hydrate Citation: Chen Yilan, Ding Jisheng, Zhang Haiquan, Tang Qiuhua, Zhou Xinghua, Liu Xiaoyu. 2019. Multibeam water column data research in the Taixinan Basin: Implications for the potential occurrence of natural gas hydrate. Acta Oceanologica Sinica, 38(5): 129–133, doi: 10.1007/s13131-019-1444-0
1 Introduction In recent decades, the multibeam sonar system has been widely used in underwater topographic surveys because of its full coverage, high resolution, high precision, and high efficiency. The multibeam survey has become a main investigation method for the underwater topography surveys. In addition to the development of underwater multibeam sonar systems, and the development of computer processing and storage, a large amount of marine acoustic information has been collected. This information is not only used in hydrographic surveying, but also in the fields of marine biology, physical oceanography, marine geology, and geophysics. Many researchers have done studies based on multibeam sonar data. The sonar data can be used to detect fish schools, plankton, internal waves, and hydrothermal vents, and to identify ocean habitats (Yang et al., 2013; Colbo et al., 2014; Melvin and Cochrane, 2015; Bayrakci et al., 2014). In recent years, multibeam water column data have been used to detect natural gas vents. For example, Elhegazy (2011) used water column images to detect and analyze undersea black smokers and natural gas vents. Nakamura et al. (2015) detected many undersea hydrothermal vents in the central area of the Okinawa Trough using multibeam water column images. These examples show that multibeam water column image investigations are an effective method for detecting the hydrothermal vents. Multibeam sonar images can be used to rapidly detect areas where hydrothermal fluids and cold seepages have developed, and provide new approaches for the detection of undersea resources. Geophysical methods have often been used to detect oil and gas resources (Luan et al., 2008; Xu et a
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