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

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
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)

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Fedoseev, G. S., Sotnikov, V. I., & Rikhvanov, L. P. (2005). Geochemistry and geochronology of permo-triassic basites in the northwestern altai-sayan folded area. Geologiya i Geofizika, 46(3), 289-302.

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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.",

keywords = "Ar/ Ar geochronology, Basites, Dikes, Geochemistry, Kolyvan-Tomsk folded zone, Kuznetsk basin, Sills",

author = "Fedoseev, {G. S.} and Sotnikov, {V. I.} and Rikhvanov, {L. P.}",

year = "2005",

language = "English",

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journal = "Geologiya i Geofizika",

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AU - Fedoseev, G. S.

AU - Sotnikov, V. I.

AU - Rikhvanov, L. P.

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

KW - Ar/ Ar geochronology

KW - Basites

KW - Dikes

KW - Geochemistry

KW - Kolyvan-Tomsk folded zone

KW - Kuznetsk basin

KW - Sills

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