Petrology

, Volume 14, Issue 2, pp 187–200

Baddeleyite: A promising geochronometer for alkaline and basic magmatism

  • T. B. Bayanova
Article

DOI: 10.1134/S0869591106020032

Cite this article as:
Bayanova, T.B. Petrology (2006) 14: 187. doi:10.1134/S0869591106020032

Abstract

The paper is devoted to the history of the discovery, petrological and mineralogical characterization, and U-Pb dating of baddeleyite ZrO2, which was separated from various Archean, Proterozoic, and Paleozoic rocks from Fennoscandia. The morphology of this mineral and its U-Pb age values were examined in the Archean carbonatites (2613 ± 18 Ma) of Siilinjarvi, Finland, and gabbronorite dikes (2738 ± 6 Ma) at the Kirovogorskoe deposit. U-Pb isochrons are reported for the baddeleyite-zircon pair obtained from the gabbronorites and anorthosites of the Proterozoic pyroxenite-gabbronorite-anorthosite association. The U-Pb baddeleyite dates for the early gabbronorite phase (2.5 Ga) and for a gabbronorite dike (late phase, 2.4 Ga) suggest that the basic magmatism evolved over a long time period (100 m.y.) in the Proterozoic. U-Pb dates are also reported for baddeleyite from the Paleozoic carbonatites of Kovdor, Sebljarv, and Vuorijarvi.

Copyright information

© Pleiades Publishing, Inc. 2006

Authors and Affiliations

  • T. B. Bayanova
    • 1
  1. 1.Geological Institute, Kola Science CenterRussian Academy of SciencesApatity, Murmansk oblastRussia