Pb—Pb Age of the Bakal Ore Field Riphean Magnesite

G. V. Ovchinnikova; A. B. Kuznetsov; M. T. Krupenin; I. M. Vasil’eva; O. K. Kaurova

doi:10.1134/S1028334X18080184

Pb—Pb Age of the Bakal Ore Field Riphean Magnesite

Authors: Ovchinnikova G.V.¹, Kuznetsov A.B.¹, Krupenin M.T.², Vasil’eva I.M.¹, Kaurova O.K.¹
Affiliations:
1. Institute of Precambrian Geology and Geochronology
2. Zavaritsky Institute of Geology and Geochemistry, Ural Branch
Issue: Vol 481, No 2 (2018)
Pages: 1040-1044
Section: Geochemistry
URL: https://journals.rcsi.science/1028-334X/article/view/193840
DOI: https://doi.org/10.1134/S1028334X18080184
ID: 193840

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Abstract

For the first time, the age of magnesite in the Lower Riphean Bakal Formation of the Southern Urals is determined by the U—Pb (Pb—Pb) method: it is equal to 1366 ± 47 Ma (MSWD = 18). The stage of magnesite formation of the Bakal ore field was associated with the Mashak rifting pulse and took place prior to the formation of industrial deposits of the Bakal siderite.