Specification of criteria of diagnostics of kimberlites of Yakutia: Petrochemistry and mineralogy

• Main Authors: Golubeva Yu.Yu., Tsepin A.I.
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: 2020
• Subjects: Composition; Geochemistry; Mica; Mineralogy; Perovskite; Petrochemicals; Rocks; Kimberlites; Diamond deposits; Yakutia
• Online Access: https://openrepository.ru/article?id=254020

To improve specification accuracy for investigated basic-ultrabasic rocks of Yakutian diamond-bearing province, mineralogical criteria (micas and perovskites) were additionally applied. The chemical compositions of micas from typical kimberlites from 6 pipes were compared with micas from previously characterized petrogeochemically-specific rocks similar to orangites and lamproites. As shown, micas' composition can't be a criterion for basic-ultrabasic rock classification and differentiation of kimberlites, orangites and lamproites. The rock's isotope-geochemical characterization remains the only criterion.