Research output: Contribution to journal › Article › peer-review
Precambrian–Cambrian Transition in the Biryusa Cis-Sayans Uplift (Southwestern Siberian Platform). / Marusin, V. V.; Kochnev, B. B.; Pokrovsky, B. G. et al.
In: Doklady Earth Sciences, Vol. 521, No. 2, 19, 13.04.2025, p. 1-6.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Precambrian–Cambrian Transition in the Biryusa Cis-Sayans Uplift (Southwestern Siberian Platform)
AU - Marusin, V. V.
AU - Kochnev, B. B.
AU - Pokrovsky, B. G.
AU - Metelkin, D. V.
N1 - This study was supported by the Russian Science Foundation (grant No. 21-17-00052). The work is coordinated by the Basic Research Programs of the Russian Academy of Sciences FWZZ-2022-0002 and FWZZ-2022-0001, and by the Research Program of the Ministry of Science and Higher Education (Russia) FSUS-2025-0008. Precambrian–Cambrian Transition in the Biryusa Cis-Sayans Uplift (Southwestern Siberian Platform) / V. V. Marusin, B. B. Kochnev, B. G. Pokrovsky, D. V. Metelkin // Doklady Earth Sciences. – 2025. – Vol. 521, No. 2. – P. 1-6. – DOI 10.1134/S1028334X24605820.
PY - 2025/4/13
Y1 - 2025/4/13
N2 - Abstract: Herein we present an integrated chemostratigraphic (δ13С and δ18O) and paleoichnological study of the Ust’-Tagul and basal Usol’e formations of the Biryusa Cis-Sayans Uplift (southwestern Siberian Platform). Positive carbon isotope excursion in the upper 34 m of the Ust’-Tagul Formation corresponds to ZHUCE anomaly in the composite δ13С curve and suggests Tommotian age of the host strata. Our data show the diachronous onset of the massive evaporitic sedimentation, marking the base of the Usol’e Regional Stage, in different paleobasins at the southwestern margin of the Siberian Platform. The isotope record of the Ust’-Tagul Formation lacks a profound negative excursion comparable to BACE anomaly. The lowermost appearance of burrows Treptichnus pedum 90 m above the base of the formation, where the shallow-marine facies first occur, suggests the host strata are of the Nemakit–Daldynian age. Although the base of the Nemakit–Daldynian Stage cannot be precisely defined in the section, it putatively corresponds to the base of the Ust’-Tagul Formation.
AB - Abstract: Herein we present an integrated chemostratigraphic (δ13С and δ18O) and paleoichnological study of the Ust’-Tagul and basal Usol’e formations of the Biryusa Cis-Sayans Uplift (southwestern Siberian Platform). Positive carbon isotope excursion in the upper 34 m of the Ust’-Tagul Formation corresponds to ZHUCE anomaly in the composite δ13С curve and suggests Tommotian age of the host strata. Our data show the diachronous onset of the massive evaporitic sedimentation, marking the base of the Usol’e Regional Stage, in different paleobasins at the southwestern margin of the Siberian Platform. The isotope record of the Ust’-Tagul Formation lacks a profound negative excursion comparable to BACE anomaly. The lowermost appearance of burrows Treptichnus pedum 90 m above the base of the formation, where the shallow-marine facies first occur, suggests the host strata are of the Nemakit–Daldynian age. Although the base of the Nemakit–Daldynian Stage cannot be precisely defined in the section, it putatively corresponds to the base of the Ust’-Tagul Formation.
KW - Cambrian
KW - Siberian Platform
KW - Vendian
KW - chemostratigraphy
KW - ichnofossils
UR - https://www.mendeley.com/catalogue/9063e309-66e8-3d9f-a856-8ae08e3a6ca6/
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105005065421&origin=inward&txGid=2099ee4a9226efd65f5a487e0aa4dcaa
UR - https://www.elibrary.ru/item.asp?id=80631684
U2 - 10.1134/S1028334X24605820
DO - 10.1134/S1028334X24605820
M3 - Article
VL - 521
SP - 1
EP - 6
JO - Doklady Earth Sciences
JF - Doklady Earth Sciences
SN - 1028-334X
IS - 2
M1 - 19
ER -
ID: 66684804