Seismic Survey in Huatung Basin and Its Tectonic Significance

被引：0
|
作者：
Zhao M. [1 ,2 ,4 ]
Wang Q. [1 ,4 ]
Yang F. [1 ,4 ]
Zhang J. [1 ,2 ]
Gao H. [3 ]
Sun L. [1 ,2 ]
Liu S. [3 ]
Zhang G. [3 ]
机构：
[1] Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou
[2] Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou
[3] Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou
[4] College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing
来源：
| 1600年 / China University of Geosciences卷 / 46期
关键词：
Deep seismic survey; Gagua Ridge; Geophysics; Huatung basin; Manila subduction zone; Tectonic evolution mechanism;
D O I：
10.3799/dqkx.2020.038
中图分类号：
学科分类号：
摘要：
In the western Pacific, the Huatung basin (HB) might be a unique Early-Cretaceous oceanic basin located at the junction between the Philippine Sea plate (PSP) and Eurasia plate (EU). The HB is the key region to understand the geodynamic evolution of the western Pacific as a whole. It is a natural laboratory to investigate the interaction between the Earth's hydrosphere and lithosphere of a subduction system. Some essential scientific questions are essential toneed to be addressed based on the previous research.What is the nature and age of the crust in the HB? What is its history of formation and evolution?What is the uplift mechanism andtectonic nature of the NS-oriented Gagua ridge? For the Manila subduction zone, acting as the western boundary of the HB, what is the water content in the sediments and in the upper and lower crust of the subducting slab determined by the detailed seismic velocity structure? What is the mechanism of water emplacement? An active- and passive-source seismic experiment is necessary to be carried out also including sample dredges in near future. The crustal and mantle velocity structure beneath the HB could be acquired by the use of joint inversion of P- and S-waves. These research will not only provide geophysical constraints to understand the interaction of the Earth's hydrosphere and lithosphere of a subduction system, but will also contribute to the understanding of the tectonic framework of the western Pacific. More importantly, it is a pre-requisite before getting drilling ground truth in the HB. © 2021, Editorial Department of Earth Science. All right reserved.
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页码：359 / 368
页数：9
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