菲律宾海板块地壳结构特征: 基于地震约束的重力反演

黄子强; 吴招才; 方银霞; 许明炬; 张家岭

doi:10.3799/dqkx.2023.198

Volume 50 Issue 1

Jan. 2025

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Huang Ziqiang, Wu Zhaocai, Fang Yinxia, Xu Mingju, Zhang Jialing, 2025. Crustal Structure of Philippine Sea Plate: Insights from Gravity Inversions Constrained by Deep Seismic. Earth Science, 50(1): 234-245. doi: 10.3799/dqkx.2023.198

Citation:

Huang Ziqiang, Wu Zhaocai, Fang Yinxia, Xu Mingju, Zhang Jialing, 2025. Crustal Structure of Philippine Sea Plate: Insights from Gravity Inversions Constrained by Deep Seismic. Earth Science, 50(1): 234-245. doi: 10.3799/dqkx.2023.198

Citation:

Huang Ziqiang, Wu Zhaocai, Fang Yinxia, Xu Mingju, Zhang Jialing, 2025. Crustal Structure of Philippine Sea Plate: Insights from Gravity Inversions Constrained by Deep Seismic. Earth Science, 50(1): 234-245. doi: 10.3799/dqkx.2023.198

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Crustal Structure of Philippine Sea Plate: Insights from Gravity Inversions Constrained by Deep Seismic

doi: 10.3799/dqkx.2023.198

Huang Ziqiang^{1
,
,},
Wu Zhaocai^{1
,
,},
Fang Yinxia¹,
Xu Mingju²,
Zhang Jialing^{1, 3}

1.
Key Laboratory of Submarine Geoscience & Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
2.
College of Civil Engineering and Architecture, Zhejiang University of Water Resources and Electric Power, Hangzhou 310012, China
3.
Ocean College, Zhejiang University, Zhoushan 316021, China

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

Abstract

Abstract

In order to understand the deep structure of the geological tectonic units of the Philippine Sea plate and the crustal feature of the Kyushu-Palau Ridge, this paper uses satellite gravity anomaly, combined with the bathymetry, sediment thickness and oceanic crust age data in the study area to correct the gravity effects of sediment and thermal disturbance. The Moho depth and crustal thickness of the Philippine Sea plate were calculated by combining Moho depth data from OBS profiles cross the KPR as constraints. The results show that the overall crustal thickness of the Philippine Sea plate is characterized by a gradual increase from west to east and from south to north. The Moho depth of the West Philippine Basin is about 10 km, with a crustal thickness of about 4 km. The average crustal thickness of the Parece Vela Basin is about 7 km, which is larger than that of the older West Philippine Basin.The crustal thickness of the Kyushu-Palau Ridge is 14 km at the maximum. In the 18°-19°N segment of the KPR, the crust is about 8 km, which is similar to the normal oceanic crust thickness in the Parece Vela Basin. There is no significant thickening crust. The crustal properties of the KPR are oceanic crust that has been thickened by back-arc magmatism, rather than mature island arc crust.
- West Philippine Basin,
- Kyushu-Palau Ridge,
- Parece Vela Basin,
- crustal thickness,
- crustal property,
- marine geology

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References(47)

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