Open AccessEVENT STRATIGRAPHY AND CORRELATION PROBLEMS OF THE ORDOVICIAN STRATA OF GORNY ALTAI AND SALAIR
Author(s) -
Н В Сенников,
О Т Обут,
E.V. Lykova,
А. В. Тимохин,
R.A. Khabibulina,
Т. А. Щербаненко
Publication year - 2021
Publication title -
geodinamika i tektonofizika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.336
H-Index - 8
ISSN - 2078-502X
DOI - 10.5800/gt-2021-12-2-0523
Subject(s) - ordovician , geology , paleontology , structural basin , baltica , facies , sedimentary rock , sedimentary depositional environment
Study of the Ordovician sedimentary sequences of Gorny Altai and Salair has revealed lithological and paleontological features correlating with global sedimentary events: (1) The Acerocare Regressive Event (an initial event in the Early Tremadocian); (2) Black Mountain Transgressive Event (Early Tremadocian); (3) Peltocare Regressive Event (Tremadocian); (4) Kelly Creek Regressive Event (Late Tremadocian); (5) Ceratopyge Regressive Event (Late Tremadocian); (6) Billingen Transgressive Event (Early Floian); (7) Stein Lowstand Event (Middle Darriwilian); (8) Vollen Lowstand Event (Sandbian); (9) Arestad Drowning Event (Middle Sandbian); (10) Frognerkilen Lowstand Event (Early Katian); (11) Linearis Drowning Events 1 and 2 (Middle Katian); (12) Terminal Husbergoya Lowstand Event (Hirnantian); and (13) Hirnantian Lowstand Event (HICE) (Late Ordovician). The chronostratigraphic levels with traces of the global sedimentary events in the Uymen-Lebed structural-facies zone (SFZ) (Gorny Altai) differ from those in the Charysh-Inya and Anui-Chuya SFZ (Altai). In the Ordovician, the Altai basin located in the Charysh-Inya and Anui-Chuya SFZ was a marine area separated from both the Uymen-Lebed basin and the coeval Salair basin. The traces of the global sedimentary and/or biotic events in the Altai and Salair sections can be used as a precise basis for direct correlation of the local stratigraphic units with the units of the International Stratigraphic Chart.