Geochemistry and geochronology of permo-triassic basites in the northwestern altai-sayan folded area

G. S. Fedoseev, V. I. Sotnikov, L. P. Rikhvanov

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Petrogeochemical and isotope-geochronological data are of paramount importance for refining the geologic correlation between weakly exposed magmatites of the Kolyvan'-Tomsk folded zone and Kuznetsk basin. We report data on dike and dike-sill basite complexes of shallow-depth genesis. According to the 40Ar/39Ar age estimates, basites in the Kuznetsk and Gorlovka basins are older than dikes free of xenogenous matter in the Tomsk magmatic area(248.95 ± 1.81- 246.2 ± 1.4, 259.1 ± 3.4, and 241.6 ± 2.7-238.0 ± 5.2 Ma, respectively) and are close in petrogeochemistry to basites of the Tashara complex in the Novosibirsk magmatic area. These data suggest the synchronous occurrence of magmatic events related to the Permo-Triassic plume activity within the West Siberian Plate, Siberian Platform, and their southern folded framing.

Original languageEnglish
Pages (from-to)289-302
Number of pages14
JournalGeologiya i Geofizika
Volume46
Issue number3
Publication statusPublished - 2005

Keywords

  • Ar/ Ar geochronology
  • Basites
  • Dikes
  • Geochemistry
  • Kolyvan-Tomsk folded zone
  • Kuznetsk basin
  • Sills

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

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