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 language | English |
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Pages (from-to) | 289-302 |
Number of pages | 14 |
Journal | Geologiya i Geofizika |
Volume | 46 |
Issue number | 3 |
Publication status | Published - 2005 |
Keywords
- Ar/ Ar geochronology
- Basites
- Dikes
- Geochemistry
- Kolyvan-Tomsk folded zone
- Kuznetsk basin
- Sills
ASJC Scopus subject areas
- Earth and Planetary Sciences (miscellaneous)