多波束资料在胶州湾口海底节理构造研究中的应用

利用2004年5月在青岛胶州湾口获得的高分辨率多波束资料(水平分辨率0.5m×1m,垂向分辨率0.2m),研究了该区海底节理构造及其分布规律,揭示青岛胶州湾团岛至薛家岛的研究区域中存在大量线性微地形,在海底地形图上表现为2组相交的“X”型线性阴影(一组为NE向,另一组为NW向),把整个海底切割成菱形格状。结合侧扫声纳探测等资料分析,认为这种线性微地形可能代表了海底出露的节理(裂隙)微构造。

Application of Multibeam Data in Studying the Seabed Joint Structure at the Jiaozhou Bay Mouth

In this paper, the high-resolution multibeam data (horizontal resolution is 0.5m1m and vertical one is 0.2m) observed at the Jiaozhou Bay mouth in May 2004 are used to study the seabed joint structure and joint distribution regularities. It is shown from the study results that there are many linear microreliefs in the study area from Tuandao to Xuejiadao, these microreliefs are displayed in the seafloor relief images as 2 sets of criscross X-shaped linear shades, one set of microreliefs strikes NE, and the other set strikes NW, which cut the whole seafloor into rhombuses. Having analyzed the multibeam data together with the side scan sonar data, we suggest that these microreliefs may represent the microstructures of joints (fractures) cropping out the seafloor.