| 马里亚纳海沟“挑战者深渊”最深点水深探测 |
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| 引用本文： | 刘方兰,杨胜雄,邓希光,曲佳.马里亚纳海沟“挑战者深渊”最深点水深探测[J].海洋测绘,2013,33(5):49-52. |
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| 作者姓名： | 刘方兰 杨胜雄 邓希光 曲佳 |
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| 作者单位： | 广州海洋地质调查局,广东广州,510760 |
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| 基金项目： | 国际海域资源调查与开发"十二五"富钴结壳资源评价项目 |
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| 摘 要： | 20112012年,海洋六号船采用EM122多波束测深系统在马里亚纳海沟最深海域"挑战者深渊"进行的多波束水深测量,通过对测深资料进行分析处理,获得了高精度海底地形图,揭示了马里亚纳海沟挑战者深渊附近海底地形呈近东西向延伸,有西部、中部和东部三个洼地,它们由10800m等深线圈闭,长轴方向与海沟方向一致。洼地底部水深大于10900m,地形较为平坦。三个洼地最深区域分别由10916m、10904m和10915m等深线圈闭。三个洼地最大水深为10917m(误差小于20m),位于西部洼地内,中心位置为142°12.14'E,11°19.92'N。该处也是马里亚纳海沟最深点。
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| 关 键 词： | 多波束测深 马里亚纳海沟 挑战者深渊 最大深度 海底地形 |
Depth Detection in the Challenger Deep of Mariana Trench |
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| LIU Fanglan,YANG Shengxiong,DENG Xiguang,QU Jia.Depth Detection in the Challenger Deep of Mariana Trench[J].Hydrographic Surveying and Charting,2013,33(5):49-52. |
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| Authors: | LIU Fanglan YANG Shengxiong DENG Xiguang QU Jia |
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| Institution: | ( Guangzhou Marine Geological Survey, Guangzhou 510760, China) |
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| Abstract: | In 2011 and 2012 ,R/V Hai Yang Liu Hao used EM122 multibeam bathymetric system to gather the full coverage depth measurement data of the Challenger Deep which is the deepest waters in the Mariana Trench. By analyzing topographic characteristics of the study area, we consider the Mariana Trench extends from east to west parts of the region. There are three depressions located at the western, central and eastern parts of the region. The depressions are circled by the depth contour of 10800 meters. The direction of the depressions＇ long axis is the same as that of the Mariana Trench. The depth at the bottom of depressions is greater than 10900 meters, and the topography is relatively flat. The deepest areas of three depressions are enclosed by the depth contours of 10916 meters, 10904 meters and 10915 meters respectively. The deepest point at 142°12.14＇E, 11 ° 19.92＇N within the western depression is about 10917 meters （the max. tolerance is less than 20 meters）, which is also the deepest point in the Mariana Trench. |
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| Keywords: | multibeam echosounding Mariana Trench Challenger Deep maximum depth seabed topography |
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