New Insights into the Seamount Structure of the Northern Part of the Ninetyeast Ridge (Indian Ocean) through the Integrated Analysis of Geophysical Data
The linear Ninetyeast Ridge (NER) is the longest oceanic intraplate volcanic edifice and main feature in the Eastern Indian Ocean. Many seamounts are located on the ridge, whose origin and age remain unclear due to the lack of samples of the bedrock of which they are composed. Carbonate sedimentary...
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MDPI AG
2023-04-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/5/924 |
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| author | Vsevolod Yutsis Oleg Levchenko Alexander Ivanenko Ilya Veklich Nataliya Turko Yulia Marinova |
| author_facet | Vsevolod Yutsis Oleg Levchenko Alexander Ivanenko Ilya Veklich Nataliya Turko Yulia Marinova |
| author_sort | Vsevolod Yutsis |
| collection | DOAJ |
| description | The linear Ninetyeast Ridge (NER) is the longest oceanic intraplate volcanic edifice and main feature in the Eastern Indian Ocean. Many seamounts are located on the ridge, whose origin and age remain unclear due to the lack of samples of the bedrock of which they are composed. Carbonate sedimentary caps on these seamounts prevent their direct geological sampling by dredging, therefore indirect geophysical methods are an alternative. Such integrated geophysical studies (the main methods are multibeam bathymetry and magnetic surveys) were carried out in cruise #42 of the <i>R/V Akademik Boris Petrov</i> in 2017 on a large seamount at the base of the NER’s western slope near 0.5° S. The collected data also includes seismic reflection data that reveal morphology, fault tectonics, depth structure, and an assumed origin of this volcanic feature. The Ninetyeast Ridge was formed by the Kerguelen plume magmatism at 50° S in the giant N-S fault. The seamount studied in cruise #42 of the <i>R/V Akademik Boris Petrov</i> was formed mainly to the north as a result of two-stage magmatism in a transverse strike-slip fault. The first stage (47 Ma) formed the main western part of the seamount at 20° S. The second stage (23 Ma) formed its eastern part at 8° S. The time intervals between the formation of the main massif of the Ninetyeast Ridge and the stages of subsequent magmatism that formed the western and eastern parts of the seamount are approximately 31 and 55 Ma, respectively. |
| first_indexed | 2024-03-11T03:36:43Z |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-11T03:36:43Z |
| publishDate | 2023-04-01 |
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| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-adf035d114f1450bb0d7d1a0f24de4082023-11-18T01:58:33ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-04-0111592410.3390/jmse11050924New Insights into the Seamount Structure of the Northern Part of the Ninetyeast Ridge (Indian Ocean) through the Integrated Analysis of Geophysical DataVsevolod Yutsis0Oleg Levchenko1Alexander Ivanenko2Ilya Veklich3Nataliya Turko4Yulia Marinova5División de Geociencias Aplicadas, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), San Luis Potosí 78216, SLP, MexicoShirshov Institute of Oceanology, Russian Academy of Sciences, Moscow 119991, RussiaShirshov Institute of Oceanology, Russian Academy of Sciences, Moscow 119991, RussiaShirshov Institute of Oceanology, Russian Academy of Sciences, Moscow 119991, RussiaGeological Institute, Russian Academy of Sciences, Moscow 119017, RussiaShirshov Institute of Oceanology, Russian Academy of Sciences, Moscow 119991, RussiaThe linear Ninetyeast Ridge (NER) is the longest oceanic intraplate volcanic edifice and main feature in the Eastern Indian Ocean. Many seamounts are located on the ridge, whose origin and age remain unclear due to the lack of samples of the bedrock of which they are composed. Carbonate sedimentary caps on these seamounts prevent their direct geological sampling by dredging, therefore indirect geophysical methods are an alternative. Such integrated geophysical studies (the main methods are multibeam bathymetry and magnetic surveys) were carried out in cruise #42 of the <i>R/V Akademik Boris Petrov</i> in 2017 on a large seamount at the base of the NER’s western slope near 0.5° S. The collected data also includes seismic reflection data that reveal morphology, fault tectonics, depth structure, and an assumed origin of this volcanic feature. The Ninetyeast Ridge was formed by the Kerguelen plume magmatism at 50° S in the giant N-S fault. The seamount studied in cruise #42 of the <i>R/V Akademik Boris Petrov</i> was formed mainly to the north as a result of two-stage magmatism in a transverse strike-slip fault. The first stage (47 Ma) formed the main western part of the seamount at 20° S. The second stage (23 Ma) formed its eastern part at 8° S. The time intervals between the formation of the main massif of the Ninetyeast Ridge and the stages of subsequent magmatism that formed the western and eastern parts of the seamount are approximately 31 and 55 Ma, respectively.https://www.mdpi.com/2077-1312/11/5/924seamountNinetyeast Ridgebathymetryfaulthigh-resolution seismic datareflector |
| spellingShingle | Vsevolod Yutsis Oleg Levchenko Alexander Ivanenko Ilya Veklich Nataliya Turko Yulia Marinova New Insights into the Seamount Structure of the Northern Part of the Ninetyeast Ridge (Indian Ocean) through the Integrated Analysis of Geophysical Data Journal of Marine Science and Engineering seamount Ninetyeast Ridge bathymetry fault high-resolution seismic data reflector |
| title | New Insights into the Seamount Structure of the Northern Part of the Ninetyeast Ridge (Indian Ocean) through the Integrated Analysis of Geophysical Data |
| title_full | New Insights into the Seamount Structure of the Northern Part of the Ninetyeast Ridge (Indian Ocean) through the Integrated Analysis of Geophysical Data |
| title_fullStr | New Insights into the Seamount Structure of the Northern Part of the Ninetyeast Ridge (Indian Ocean) through the Integrated Analysis of Geophysical Data |
| title_full_unstemmed | New Insights into the Seamount Structure of the Northern Part of the Ninetyeast Ridge (Indian Ocean) through the Integrated Analysis of Geophysical Data |
| title_short | New Insights into the Seamount Structure of the Northern Part of the Ninetyeast Ridge (Indian Ocean) through the Integrated Analysis of Geophysical Data |
| title_sort | new insights into the seamount structure of the northern part of the ninetyeast ridge indian ocean through the integrated analysis of geophysical data |
| topic | seamount Ninetyeast Ridge bathymetry fault high-resolution seismic data reflector |
| url | https://www.mdpi.com/2077-1312/11/5/924 |
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