南海海盆海山形态特征的定量化和无监督聚类分析

邓达振; 赵阳慧; BryanRiel; 高金耀; 方银霞

doi:10.3799/dqkx.2023.218

Volume 50 Issue 1

Jan. 2025

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Deng Dazhen, Zhao Yanghui, Bryan Riel, Gao Jinyao, Fang Yinxia, 2025. Quantification and Unsupervised Clustering Analysis of Morphological Characteristics of Seamounts in South China Sea Basin. Earth Science, 50(1): 217-233. doi: 10.3799/dqkx.2023.218

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Deng Dazhen, Zhao Yanghui, Bryan Riel, Gao Jinyao, Fang Yinxia, 2025. Quantification and Unsupervised Clustering Analysis of Morphological Characteristics of Seamounts in South China Sea Basin. Earth Science, 50(1): 217-233. doi: 10.3799/dqkx.2023.218

Citation:

Deng Dazhen, Zhao Yanghui, Bryan Riel, Gao Jinyao, Fang Yinxia, 2025. Quantification and Unsupervised Clustering Analysis of Morphological Characteristics of Seamounts in South China Sea Basin. Earth Science, 50(1): 217-233. doi: 10.3799/dqkx.2023.218

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Quantification and Unsupervised Clustering Analysis of Morphological Characteristics of Seamounts in South China Sea Basin

doi: 10.3799/dqkx.2023.218

1.
Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
2.
School of Earth Sciences, Zhejiang University, Hangzhou 310058, China

Received Date: 2023-09-08
Available Online: 2025-02-10
Publish Date: 2025-01-25

Abstract

Abstract

Morphological differences are evident among submarine volcanoes formed by varying eruption patterns. However, their interrelationship remains elusive due to methodological constraints. This study innovatively employs machine learning clustering analysis on high-resolution multibeam bathymetry data to quantitatively evaluate the morphological parameters of seamounts in the South China Sea Basin. The analysis discerns three distinct seamount types. Type Ⅰ: large, isolated seamounts characterized by significant volume, steep slopes, and rounded bases. Type Ⅱ: large, linear seamounts with substantial volume, gentle slopes, and elongated bases. Type Ⅲ: smaller seamounts with limited volume, gentle slopes, and elliptical bases. Type Ⅰ and Ⅱ seamounts are primarily found in the mid-ocean ridge zone of the eastern sub-basin. The pronounced morphology of Type Ⅰ suggests an active and rapid eruption regime, whereas Type Ⅱ's subdued form indicates slower volcanic activity with more fluidic lava flows. Conversely, Type Ⅲ, situated along the transform faults and distant from the mid-ocean ridge of the eastern sub-basin, signifies less intense volcanic activities. This research establishes a foundational understanding that seamount formations under distinct tectonic backgrounds follow general morphological patterns. The novel clustering approach proposed here offers fresh perspectives for probing volcanic eruption patterns, especially when extensive petrological data is not available.
- seamount morphology,
- volcanic eruption pattern,
- South China Sea Basin,
- cluster analysis,
- machine learning,
- marine geology

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Quantification and Unsupervised Clustering Analysis of Morphological Characteristics of Seamounts in South China Sea Basin

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