Email this article Geochemical Characteristics of Jurassic Plume Magmatism in Ahlmannryggen Massif (Queen Maud Land, East Antarctica)
- Authors: Sushchevskaya N.M.1, Belyatsky B.V.2, Leitchenkov G.L.3, Batanova V.G.1,4, Sobolev A.V.1,4
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Affiliations:
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Science
- Karpinsky Russian Geological Research Institute, Center for Isotopic Research
- Gramberg All-Russia Research Institute of Geology and Mineral Resources of the World Ocean
- Université Grenoble Alpes, Institute Science de la Terre (ISTerre)
- Issue: Vol 486, No 1 (2019)
- Pages: 529-532
- Section: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/194958
- DOI: https://doi.org/10.1134/S1028334X19050076
- ID: 194958
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Abstract
The Mesozoic dykes related to the distribution of Karoo plume on the territory of East Antarctica are studied. It is shown that magnesian high-Ti ferrobasalts are found in the area of Ahlmannryggen massif. Their formation is determined by melting of the mantle that contains pyroxenite. The isotope characteristics of the studied dolerites reflect the composition of a pyroxenite source, i.e., the ancient oceanic lithosphere (EMI) that subsided to the mantle depths of 150–170 km in the paleosubduction zone of the continent of Gondwana and was transformed to the pyroxenite melt 180 Ma ago during the interaction with mantle peridotite of the plume.
About the authors
N. M. Sushchevskaya
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Science
Author for correspondence.
Email: nadyas@geokhi.ru
Russian Federation, Moscow, 119991
B. V. Belyatsky
Karpinsky Russian Geological Research Institute,Center for Isotopic Research
Author for correspondence.
Email: bbelyatsky@mail.ru
Russian Federation, St. Petersburg, 199106
G. L. Leitchenkov
Gramberg All-Russia Research Institute of Geologyand Mineral Resources of the World Ocean
Email: bbelyatsky@mail.ru
Russian Federation,
St. Petersburg, 190121
V. G. Batanova
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Science; Université Grenoble Alpes, Institute Science de la Terre (ISTerre)
Email: bbelyatsky@mail.ru
Russian Federation, Moscow, 119991; Grenoble
A. V. Sobolev
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Science; Université Grenoble Alpes, Institute Science de la Terre (ISTerre)
Email: bbelyatsky@mail.ru
Russian Federation, Moscow, 119991; Grenoble
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