Age and Geochemical Features of Dredged Basalts from Offshore SW Taiwan: The Coincidence of Intra-Plate Magmatism with the Spreading South China Sea
This study reports age and geochemical analyses of basaltic rocks dredged from volcanic seamounts offshore SW Taiwan. 40Ar/39Ar dating results of these rocks show them to be of the early Miocene age of ~22 - 21 Ma. They are evolved alkali basalts that show OIB-type geochemical features similar to po...
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| Format: | Article |
| Language: | English |
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Springer
2012-01-01
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| Series: | Terrestrial, Atmospheric and Oceanic Sciences |
| Subjects: | |
| Online Access: |
http://tao.cgu.org.tw/images/attachments/v236p657.pdf
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| _version_ | 1817971391823085568 |
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| author | Kuo-Lung Wang Yi-Ming Lo Sun-Lin Chung Ching-Hua Lo Shu-Kun Hsu Huai-Jen Yang Ryuichi Shinjo |
| author_facet | Kuo-Lung Wang Yi-Ming Lo Sun-Lin Chung Ching-Hua Lo Shu-Kun Hsu Huai-Jen Yang Ryuichi Shinjo |
| author_sort | Kuo-Lung Wang |
| collection | DOAJ |
| description | This study reports age and geochemical analyses of basaltic rocks dredged from volcanic seamounts offshore SW Taiwan. 40Ar/39Ar dating results of these rocks show them to be of the early Miocene age of ~22 - 21 Ma. They are evolved alkali basalts that show OIB-type geochemical features similar to post-spreading seamount basalts (14 - 3.5 Ma) in the South China Sea (SCS) and Miocene intraplate basalts on the Penghu Islands (16 - 8 Ma) and NW Taiwan (23 - 9 Ma). Their Sr-Nd-Pb isotope data plot within the range of the SCS seamount basalts that show an EM2-like component in the mantle source. The age and overall geochemical characteristics of the dredged basalts are comparable to those of the Kungkuan basalts, NW Taiwan and Baolai basalts, SW Taiwan, suggesting an extensive alkali basaltic volcanism along the southeastern Eurasian continental margin during the early Miocene that resulted from regional lithospheric extension in association with seafloor spreading in the South China Sea. |
| first_indexed | 2024-04-13T20:46:16Z |
| format | Article |
| id | doaj.art-8e8e4f01581b40298a0d49feb2665904 |
| institution | Directory Open Access Journal |
| issn | 1017-0839 2311-7680 |
| language | English |
| last_indexed | 2024-04-13T20:46:16Z |
| publishDate | 2012-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Terrestrial, Atmospheric and Oceanic Sciences |
| spelling | doaj.art-8e8e4f01581b40298a0d49feb26659042022-12-22T02:30:41ZengSpringerTerrestrial, Atmospheric and Oceanic Sciences1017-08392311-76802012-01-0123665710.3319/TAO.2012.07.06.01(TT)1101Age and Geochemical Features of Dredged Basalts from Offshore SW Taiwan: The Coincidence of Intra-Plate Magmatism with the Spreading South China SeaKuo-Lung WangYi-Ming LoSun-Lin ChungChing-Hua LoShu-Kun HsuHuai-Jen YangRyuichi ShinjoThis study reports age and geochemical analyses of basaltic rocks dredged from volcanic seamounts offshore SW Taiwan. 40Ar/39Ar dating results of these rocks show them to be of the early Miocene age of ~22 - 21 Ma. They are evolved alkali basalts that show OIB-type geochemical features similar to post-spreading seamount basalts (14 - 3.5 Ma) in the South China Sea (SCS) and Miocene intraplate basalts on the Penghu Islands (16 - 8 Ma) and NW Taiwan (23 - 9 Ma). Their Sr-Nd-Pb isotope data plot within the range of the SCS seamount basalts that show an EM2-like component in the mantle source. The age and overall geochemical characteristics of the dredged basalts are comparable to those of the Kungkuan basalts, NW Taiwan and Baolai basalts, SW Taiwan, suggesting an extensive alkali basaltic volcanism along the southeastern Eurasian continental margin during the early Miocene that resulted from regional lithospheric extension in association with seafloor spreading in the South China Sea. http://tao.cgu.org.tw/images/attachments/v236p657.pdf MioceneDredged basaltsGeochemistrySouth China Sea spreadingTaiwanEurasian continental margin |
| spellingShingle | Kuo-Lung Wang Yi-Ming Lo Sun-Lin Chung Ching-Hua Lo Shu-Kun Hsu Huai-Jen Yang Ryuichi Shinjo Age and Geochemical Features of Dredged Basalts from Offshore SW Taiwan: The Coincidence of Intra-Plate Magmatism with the Spreading South China Sea Terrestrial, Atmospheric and Oceanic Sciences Miocene Dredged basalts Geochemistry South China Sea spreading Taiwan Eurasian continental margin |
| title | Age and Geochemical Features of Dredged Basalts from Offshore SW Taiwan: The Coincidence of Intra-Plate Magmatism with the Spreading South China Sea |
| title_full | Age and Geochemical Features of Dredged Basalts from Offshore SW Taiwan: The Coincidence of Intra-Plate Magmatism with the Spreading South China Sea |
| title_fullStr | Age and Geochemical Features of Dredged Basalts from Offshore SW Taiwan: The Coincidence of Intra-Plate Magmatism with the Spreading South China Sea |
| title_full_unstemmed | Age and Geochemical Features of Dredged Basalts from Offshore SW Taiwan: The Coincidence of Intra-Plate Magmatism with the Spreading South China Sea |
| title_short | Age and Geochemical Features of Dredged Basalts from Offshore SW Taiwan: The Coincidence of Intra-Plate Magmatism with the Spreading South China Sea |
| title_sort | age and geochemical features of dredged basalts from offshore sw taiwan the coincidence of intra plate magmatism with the spreading south china sea |
| topic | Miocene Dredged basalts Geochemistry South China Sea spreading Taiwan Eurasian continental margin |
| url |
http://tao.cgu.org.tw/images/attachments/v236p657.pdf
|
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