Low-Titanium Lamproites of the Ryabinoviy Massif (Aldan Shield): Crystallization Conditions and Lithospheric Source
- Authors: Chayka I.F.1,2, Izokh A.E.1,2, Sobolev A.V.3,4, Batanova V.G.3,4
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Affiliations:
- Sobolev Institute of Geology and Mineralogy
- Novosibirsk State University
- University Grenoble Alpes
- Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences
- Issue: Vol 481, No 2 (2018)
- Pages: 1008-1012
- Section: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/193802
- DOI: https://doi.org/10.1134/S1028334X18080020
- ID: 193802
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Abstract
Obtained data shows that high-potassic dyke rocks of the Ryabinoviy massif (Central Aldan) belong to low-titanium lamproite series (Mediterranean type) and are distinct with “classic” high-titanium lamproites. Based on Al-in-olivine thermometer, temperature of olivine–chrome-spinel pair crystallization varies in range between 1100 and 1250°C. This suggests lithospheric mantle source for the parental melt and makes role of mantle plume insignificant. High-precision data on olivine composition and bulk rock traceelement composition imply mixed source for the parental melt, consisted of depleted peridotite and enriched domains, originated during ancient subduction.
About the authors
I. F. Chayka
Sobolev Institute of Geology and Mineralogy; Novosibirsk State University
Author for correspondence.
Email: ifc02@yandex.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090
A. E. Izokh
Sobolev Institute of Geology and Mineralogy; Novosibirsk State University
Email: ifc02@yandex.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090
A. V. Sobolev
University Grenoble Alpes; Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences
Email: ifc02@yandex.ru
France, Grenoble; Moscow, 119991
V. G. Batanova
University Grenoble Alpes; Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences
Email: ifc02@yandex.ru
France, Grenoble; Moscow, 119991