| Registro completo |
| Provedor de dados: |
OceanDocs
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| País: |
Belgium
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| Título: |
Analysis on the basement constitution of the southern Okinawa Trough.
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| Autores: |
Liu, Jianhua
Gao, Jinyao
Fang, Yinxia
Wu, Shuigen
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| Data: |
2015-01-23
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| Ano: |
2008
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| Palavras-chave: |
Oceanographic institutions
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| Resumo: |
Based on the data of seismic reflection, seismic refraction and magnetism collected in the research area and geology obtained from adjacent areas, this paper deals with the issue of basement constitution of the southern part of the Okinawa Trough. In the shelf basin of the East China Sea, Taiwan folded belt and Ryukyu Islands folded belt which surround the trough, outcrop Later Paleozoic, Mesozoic and Eogene strata. In the southern trough, multichannel seismic reflection data indicate that the overlying strata are composed of Neogene and Quaternary deposits, and the acoustic basement consists of Eogent and even older strata. Seismic refraction profiles show that there are Eogene and Mesozoic velocity layers with longitudinal velocities of 4.7 - 5.3 km/s and 6.3 km/s respectively beneath the Quaternary-Miocene Layers. Qualitative analysis and forward and reversed calculation of magnetic data show that the magnetic basement is mainly formed by metamorphic rocks, the Yanshanian neutral-acid magmatic rocks and the Himalayan neutral-basic magmatic rocks being the next components, and the magnetic basement is mostly corresponding to the acoustic basement. Comprehensive analyses demonstrate that the basement of the southern Okinawa Trough is mainly formed by Eogene system and Mesozoic and Upper Paleozoic groups metamorphosed in varying degrees, and the basic magmatic rocks of Himalayan epoch have been formed in some parts of the basin.
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| Tipo: |
Journal Contribution
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| Idioma: |
Inglês
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| Identificador: |
Marine Science Bulletin, 10 (1), 75-86
1000-9620
http://hdl.handle.net/1834/5873
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| Direitos: |
http://creativecommons.org/licenses/by-nc/3.0/
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