The Source of Ore Fluids and Sm–Nd Age of Siderite from the Largest Bakal Deposit, Southern Urals

Autor:	T. Ya. Gulyaeva, M. V. Chervyakovskaya, M. T. Krupenin, G. V. Konstantinova, A. B. Kuznetsov
Rok vydání:	2021
Předmět:	Riphean Rift Gabbro Geochemistry Geology Mineral resource classification Siderite chemistry.chemical_compound Precambrian chemistry Geochemistry and Petrology Economic Geology Metasomatism Magnesite
Zdroj:	Geology of Ore Deposits. 63:324-340
ISSN:	1555-6476 1075-7015
Popis:	Abstract— Based on Sm–Nd data, a crustal source of iron-ore fluid was substantiated and the probability of age estimation for hydrothermal–metasomatic siderite of the Bakal Group, Southern Urals, was shown for the first time. The εNd (Т) values of siderite (from –13.4 to –17.6) plot in the field of Riphean shale and not the Precambrian rift gabbro and granite of this region. The obtained Sm–Nd age of the Bakal siderite is 970 ± 40 Ma, which is consistent with the Pb–Pb age of siderite from the major ore phase (~1000 Ma). The established age boundary coincides with tectonic restructuring, including the formation of a number of barite–polymetallic deposits, as well as ferruginous magnesite and fluorite in the Riphean deposits on the western slope of the Southern Urals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::337e468bebd124ca051243626c612773 https://doi.org/10.1134/s1075701521040048 Zobrazit plný text záznamu Full text from SpringerLink