Oceanic crustal structure and tectonic origin of the southern Kyushu-Palau Ridge in the Philippine Sea

Xiongwei Niu; Pingchuan Tan; Weiwei Ding; Wei Wang; Yao Wei; Xiaodong Wei; Aiguo Ruan; Jie Zhang; Chunyang Wang; Yong Tang; Jiabiao Li

doi:10.1007/s13131-021-1978-9

Volume 41 Issue 1

Jan. 2022

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Article Navigation > Acta Oceanologica Sinica > 2022 > 41(1): 39-49

Xiongwei Niu, Pingchuan Tan, Weiwei Ding, Wei Wang, Yao Wei, Xiaodong Wei, Aiguo Ruan, Jie Zhang, Chunyang Wang, Yong Tang, Jiabiao Li. Oceanic crustal structure and tectonic origin of the southern Kyushu-Palau Ridge in the Philippine Sea[J]. Acta Oceanologica Sinica, 2022, 41(1): 39-49. doi: 10.1007/s13131-021-1978-9

Citation:

Xiongwei Niu, Pingchuan Tan, Weiwei Ding, Wei Wang, Yao Wei, Xiaodong Wei, Aiguo Ruan, Jie Zhang, Chunyang Wang, Yong Tang, Jiabiao Li. Oceanic crustal structure and tectonic origin of the southern Kyushu-Palau Ridge in the Philippine Sea[J]. Acta Oceanologica Sinica, 2022, 41(1): 39-49. doi: 10.1007/s13131-021-1978-9

Citation:

Xiongwei Niu, Pingchuan Tan, Weiwei Ding, Wei Wang, Yao Wei, Xiaodong Wei, Aiguo Ruan, Jie Zhang, Chunyang Wang, Yong Tang, Jiabiao Li. Oceanic crustal structure and tectonic origin of the southern Kyushu-Palau Ridge in the Philippine Sea[J]. Acta Oceanologica Sinica, 2022, 41(1): 39-49. doi: 10.1007/s13131-021-1978-9

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Oceanic crustal structure and tectonic origin of the southern Kyushu-Palau Ridge in the Philippine Sea

doi: 10.1007/s13131-021-1978-9

Xiongwei Niu^{1, 3},
Pingchuan Tan^{1, 3
,
,},
Weiwei Ding^{1, 2, 3
,
,},
Wei Wang^{1, 2},
Yao Wei¹,
Xiaodong Wei^{1, 3},
Aiguo Ruan^{1, 2, 3},
Jie Zhang^{1, 3},
Chunyang Wang^{1, 3},
Yong Tang^{1, 2, 3},
Jiabiao Li^{1, 2}

1.
Key Laboratory of Submarine Geosciences, Ministry of Natural Resources/Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
2.
School of Oceanography, Shanghai Jiao Tong University, Shanghai 200240, China
3.
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519080, China

Funds: The National Natural Science Foundation of China under contract Nos 91858214 and 41890811; the Scientific Research Fund of the Second Institute of Oceanography, MNR under contract No. HYGG2001; the National Natural Science Foundation of China under contract Nos 42006072, 41876060, 41776053 and 42076080; the National Program on Global Change and Air-Sea Interaction, MNR under contact No. GASI-02-PAC-DWZP02; the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) under contract No. 311020018.

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Author Bio:
E-mail: wwding@sio.org.cn
Corresponding author: E-mail: tanpc@sio.org.cn; wwding@sio.org.cn
Received Date: 2021-12-01
Accepted Date: 2021-12-15

Available Online: 2021-12-21

Publish Date: 2022-01-10

Abstract

Abstract

A new high-resolution velocity model of the southern Kyushu-Palau Ridge (KPR) was derived from an active-source wide-angle seismic reflection/refraction profile. The result shows that the KPR crust can be divided into the upper crust with the P-wave velocity less than 6.1 m/s, and lower crust with P-wave velocity between 6.1 km/s and 7.2 km/s. The crustal thickness of the KPR reaches 12.0 km in the center, which gradually decreases to 5.0–6.0 km at sides. The velocity structure of the KPR is similar to the structures of the adjacent West Philippine Basin and Parece Vela Basin (PVB), indicating a typical oceanic crust. Isostatic analysis shows that some regional compensation occurs during the loading of the KPR, which implies that the KPR was built mainly by magmatism during the splitting of the Izu-Bonin-Mariana arc and the following back-arc seafloor spreading of the PVB during 30–28 Ma BP. The absence of the thick middle crust (6.0–6.5 km/s) and high velocity lower-crustal layers (7.2–7.6 km/s) suggest that arc magmatism plays a less important role in the KPR formation.
- P-wave crustal structure,
- ocean bottom seismometer,
- Kyushu-Palau Ridge,
- oceanic crust

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References(33)

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