Ninetyeast ridge: Magmatism and geodynamics
- Авторлар: Sushchevskaya N.M.1, Levchenko O.V.2, Dubinin E.P.3, Belyatsky B.V.4
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Мекемелер:
- Vernadsky Institute of Geochemistry and Analytical Chemistry
- Shirshov Institute of Oceanology
- Faculty of Geology
- Karpinskii All-Russia Research Institute of Geology
- Шығарылым: Том 54, № 3 (2016)
- Беттер: 237-256
- Бөлім: Article
- URL: https://journals.rcsi.science/0016-7029/article/view/155120
- DOI: https://doi.org/10.1134/S001670291603006X
- ID: 155120
Дәйексөз келтіру
Аннотация
The study of magmatism and tectonic structure of the East Indian or Ninetyeast Ridge (NER) reveals the geochemical similarity of mantle sources for the NER and Kerguelen Plateau melts. Magmas related to the Kerguelen plume were derived from an enriched mantle source, whereas the NER tholeiitic basalts originated from a source contaminated by a depleted material. While, depleted basalt varieties were not found within the NER basalts. It was shown that magmatic rocks forming the NER were generated by high degrees (30%) of partial melting within the ancient Wharton spreading ridge due to the activity of the Kerguelen plume, which was located at this time in the vicinity of the ridge. The most significant impact of the plume on the NER structures was recorded at 70–50 Ma ago.
Негізгі сөздер
Авторлар туралы
N. Sushchevskaya
Vernadsky Institute of Geochemistry and Analytical Chemistry
Хат алмасуға жауапты Автор.
Email: nadyas@geokhi.ru
Ресей, ul. Kosygina 19, Moscow, 119991
O. Levchenko
Shirshov Institute of Oceanology
Email: nadyas@geokhi.ru
Ресей, Nakhimovskii prosp. 36, Moscow, 117997
E. Dubinin
Faculty of Geology
Email: nadyas@geokhi.ru
Ресей, Moscow, 119991
B. Belyatsky
Karpinskii All-Russia Research Institute of Geology
Email: nadyas@geokhi.ru
Ресей, Srendii prosp. 74, St. Petersburg, 199106
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