Results of U-Pb dating of zircon and baddeleyite from the Noril'sk-1 ultramafic-mafic intrusion (Russia)

K. N. Malitch*, I. Yu Badanina, E. A. Belousova, E. V. Tuganova

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We present for the first time the mineralogical and isotope-geochemical particularities of zircon and baddeleyite from various rocks of the economic ore-bearing Noril'sk-1 intrusion located in the northwestern part of the Siberian platform. The ultramafic-mafic Noril'sk-1 intrusion hosts one of the world's major economic platinum-group-element (PGE)-Cu-Ni sulphide deposits. A detailed study of crystal morphology and internal structure identify four zircon populations, characterized by different U-Pb (SHRIMP-II) ages. The U-Pb ages of baddeleyite and the defined zircon populations cover a significant time span (from 290 ± 2.8 to 226.7 ± 0.9 Ma). The established U-Pb ages imply that crystallization of baddeleyite and zircon populations corresponds to several stages of protracted evolution of the ore-forming magmatic system (290 ± 2.8, 261.3 ± 1.6, 245.7 ± 1.1, 236.5 ± 1.8, and 226.7 ± 0.9 Ma, respectively) that served as the favorable factor for accumulation of magmas and ores of unique scales and concentrations.

Original languageEnglish
Pages (from-to)123-130
Number of pages8
JournalRussian Geology and Geophysics
Volume53
Issue number2
DOIs
Publication statusPublished - Feb 2012

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