Nature of perovskite mineralization of silicate-carbonate veins in the margins of Kusinsko-Kopanskaya layered intrusion (South Urals, Russia)

Stepanov, Sergey, Palamarchuk, Roman, Kutyrev, Anton, Lepekhina, Elena, Sharpenok, Ludmila, Shagalov, Evgeniy and Minervina, Elena 2024. Nature of perovskite mineralization of silicate-carbonate veins in the margins of Kusinsko-Kopanskaya layered intrusion (South Urals, Russia). Minerals 14 (5) , 478. 10.3390/min14050478 Item availability restricted.

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Abstract

This study presents the first comprehensive investigation of perovskite from its type locality (Mineral Mines of Southern Urals, Russia), where this mineral was first described by Gustav Rose in 1839. The new data includes results from precise chemical analyses (electron-probe microanalyzer, LA-ICP-MS) and U-Pb ages (SHRIMP-II) of perovskite. Perovskite occurs in silicate-carbonate veins that transect the marginal parts of the Middle Riphaean Kusinsko-Kopanskaya layered intrusion, previously thought to be skarns. The perovskite crystals range from micrometer-scale grains to up to 11 cm in size. Chemical investigations revealed a low content of trace elements (rare earth elements, Y, Nd, U, Th) compared to perovskites from alkaline ultramafic rocks, silica-undersaturated basic rocks, carbonatites, and kimberlites. The determined age of the perovskite, 535 ± 43 Ma, significantly differs from the 1379 ± 8 Ma age of the Kusinsko-Kopanskaya intrusion, challenging the skarn-origin hypothesis for perovskite. Instead, the findings suggest a carbonatite origin for the perovskite mineralization. This timing indicates a previously unknown stage of endogenic activity on the Western Slope of the Southern Urals.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Earth and Environmental Sciences
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Type: open-access
Publisher:	MDPI
ISSN:	2075-163X
Date of First Compliant Deposit:	8 May 2024
Date of Acceptance:	27 April 2024
Last Modified:	08 May 2024 09:30
URI:	https://orca.cardiff.ac.uk/id/eprint/168765

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