| 多波束测深技术在洋中脊构造地貌解译中的应用 |
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| 引用本文： | 宋珏琛,李江海,雷雨婷,洛怡.多波束测深技术在洋中脊构造地貌解译中的应用[J].高校地质学报,2019,25(2):251. |
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| 作者姓名： | 宋珏琛 李江海 雷雨婷 洛怡 |
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| 作者单位： | 造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京100871;造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京100871;造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京100871;造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京100871 |
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| 基金项目： | 中国大洋十三五印度洋靶区断裂系统及其控矿作用研究课题;科技部重大专项 |
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| 摘 要： | 多波束测深技术在国际上是海洋科学研究、海底资源开发和海洋工程建设中的重要技术手段。基于对国内外多波束
地形数据的广泛调研，对洋中脊附近洋底构造地貌形态进行分析研究。文中利用不同扩张速率洋中脊附近的50 m分辨率的多
波束地形数据，基于数字地形空间分析方法，利用不同滑动窗口和阈值自动识别来提取洋中脊附近地形面的最大、最小曲率
以及坡度，并以此对洋中脊进行构造解译。对中大西洋洋中脊和东太平洋洋隆两个实验结果的定量分析表明，基于地形曲面
曲率和坡度的洋中脊构造解译方法是有效且可行的，其结果为洋中脊构造样式解译提供重要参考。但是相比之下，
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| 关 键 词： | 多波束测深技术 洋中脊 构造解译 空间分析 分析滑动窗口 扩张速率 |
The Application of the Multi-beam Echo Sounding Technique in Tecto-geomorphic Interpretation of Mid-ocean Ridges |
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| SONG Juechen,LI Jianghai,LEI Yuting,LUO Yi.The Application of the Multi-beam Echo Sounding Technique in Tecto-geomorphic Interpretation of Mid-ocean Ridges[J].Geological Journal of China Universities,2019,25(2):251. |
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| Authors: | SONG Juechen LI Jianghai LEI Yuting LUO Yi |
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| Abstract: | It is of great significance to understand the evolution of geological structures of mid-ocean ridges with the surface
morphology of the ocean floor near a mid-ocean ridge. Because of thin sedimentary cover, the structure and distribution of ocean floors
directly reflect the lithospheric characters of oceanic crusts and the expansion of mid-ocean ridges. Multi-beam echo sounding
technology plays a vital role in ocean explorations because it is one of important methods in marine scientific research, benthonic
resource exploitation, and ocean engineering construction. The multi-beam terrain data provide a more convenient way to study ocean
floor structures near mid-ocean ridges. In this paper, we use different expansion rates of ridge near 50 m precision of multi-beam terrain
data, based on the multi-scale space analysis method, using different sliding windows and automatic threshold recognition and
extraction of terrain near mid-ocean ridges to the maximum, minimum curvatures and slopes, and the structures of the mid-ocean ridges
according to this interpretation. For mid-ocean ridges in the Atlantic and eastern Pacific Oceans, two quantitative analysis of the test
results show that, based on the terrain surface curvatures and slopes of the mid-ocean ridge, the structural interpretation method is
effective and feasible and the results for the mid-ocean ridge tectonic style interpretations provide an important reference. However, in
comparison, application to slow spreading of mid-ocean ridges with 50 m accuracy is better than that of the rapid spreading of
mid-ocean ridges, which may be related to the size of faults and the development law of different rifting rates. |
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| Keywords: | multi-beam echo sounding technology mid-ocean ridges structure interpretation multi-scale space analysis sliding window spreading rate |
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