Low-Titanium Lamproites of the Ryabinoviy Massif (Aldan Shield): Crystallization Conditions and Lithospheric Source

I. F. Chayka, A. E. Izokh, A. V. Sobolev, V. G. Batanova

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)1008-1012
Number of pages5
JournalDoklady Earth Sciences
Volume481
Issue number2
DOIs
Publication statusPublished - 1 Aug 2018

Keywords

  • TRACE-ELEMENT
  • CONSTRAINTS

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