TY - JOUR

T1 - Evolution of the Northeastern Margin of the Kazakhstan Paleocontinent: Results of a Petro-Geochemical Study of Sedimentary and Volcanogenic-Sedimentary Rocks of the Zharma-Saur Island Arc Zone

AU - Penkina, V. A.

AU - Kotler, P. D.

AU - Safonova, I. Yu

AU - Khromykh, S. V.

AU - Perfilova, A. A.

AU - Kulikova, A. V.

AU - Galimullin, I. A.

N1 - U\u2013Pb geochronological study and determination of the contents of major and trace elements and Nd isotope composition were supported by the Russian Science Foundation (project no. 22-77-00061). Petrographic study of volcanic and volcanic-terrigenous rocks was performed within the state assignment of IGM SB RAS (no. 122041400044-2).

PY - 2024/6

Y1 - 2024/6

N2 - Abstract: The petrography, petrochemistry, geochemistry, and Nd isotopy of sedimentary and volcanogenic-sedimentary rocks, as well as U‒Pb dating of detrital zircons from sandstones and tuff sandstones of four stratigraphic units of the Zharma-Saur island arc zone, were carried out. The data obtained, geological structure, and analysis of discriminant diagrams indicate that the formation of sandstones of the Givetian‒Frasnian unit was the result of erosion and destruction of Early Paleozoic igneous complexes of the Chingiz-Tarbagatai zone of the Kazakhstan Paleocontinent. Tuff sandstones of the Koyanda Formation of the Tournaisian Stage and the Tersairyk Formation of the Visean Stage, distributed within the Vorontsov-Saur subzone, are a product of rock destruction and volcanic activity of the Zharma-Saur volcanic arc. The Early Paleozoic formations of the Chingiz-Tarbagatai zone and the Early Carboniferous volcanogenic complexes of the Zharma-Saur volcanic arc were simultaneously the provinces for the sedimentary rocks of the Kokon’ Formation of the Visean Stage, which occupies most of the Zharma-Sarsazan subzone. Our data show that the Zharma-Saur arc was emplaced at the northeastern margin of the Kazakhstan Paleocontinent at the end of the Late Devonian‒in the Early Carboniferous.

AB - Abstract: The petrography, petrochemistry, geochemistry, and Nd isotopy of sedimentary and volcanogenic-sedimentary rocks, as well as U‒Pb dating of detrital zircons from sandstones and tuff sandstones of four stratigraphic units of the Zharma-Saur island arc zone, were carried out. The data obtained, geological structure, and analysis of discriminant diagrams indicate that the formation of sandstones of the Givetian‒Frasnian unit was the result of erosion and destruction of Early Paleozoic igneous complexes of the Chingiz-Tarbagatai zone of the Kazakhstan Paleocontinent. Tuff sandstones of the Koyanda Formation of the Tournaisian Stage and the Tersairyk Formation of the Visean Stage, distributed within the Vorontsov-Saur subzone, are a product of rock destruction and volcanic activity of the Zharma-Saur volcanic arc. The Early Paleozoic formations of the Chingiz-Tarbagatai zone and the Early Carboniferous volcanogenic complexes of the Zharma-Saur volcanic arc were simultaneously the provinces for the sedimentary rocks of the Kokon’ Formation of the Visean Stage, which occupies most of the Zharma-Sarsazan subzone. Our data show that the Zharma-Saur arc was emplaced at the northeastern margin of the Kazakhstan Paleocontinent at the end of the Late Devonian‒in the Early Carboniferous.

KW - Eastern Kazakhstan

KW - Late Paleozoic

KW - Zharma-Saur zone

KW - island arc

KW - provenance area

KW - volcanism

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85206668564&origin=inward&txGid=23d424164e9ec9aebabe05bcba744502

UR - https://www.mendeley.com/catalogue/4dc12325-d72d-396a-a7c4-25fd132ea445/

U2 - 10.1134/S0016852124700274

DO - 10.1134/S0016852124700274

M3 - Article

VL - 58

SP - 321

EP - 343

JO - Geotectonics

JF - Geotectonics

SN - 0016-8521

IS - 3

ER -