Paleoecological conditions of the Middle Triassic (Anisian) in the Kara Sea based on palynology and sporomorph ecogroup analysis (SEG)
https://doi.org/10.52349/0869-7892_2025_104_103-112
Abstract
The paper covers palynological analysis of the Middle Triassic samples from the SSD 31 well section drilled in the Kara Sea. Biostratigraphic analysis of spores and pollen newly identified the assemblage with Aratrisporites spp. — Perotrilites minor in the sedimentary basin and dated the host deposits as Anisian. The assemblage is compared to the Anisian pollen assemblages from different regions (East Urals, West Siberia, Barents Sea region). The established spore and pollen taxa are grouped according to their botanical affiliation and ecological distribution. Sporomorph ecogroup analysis (SEG) led to interpret paleoecological conditions of the Middle Triassic unit sedimentation. During the sedimentary unit accumulation, the climate was found to be warm and humid, and the environment was similar to a coastal plain.
Supporting agencies: the authors are grateful to their colleagues from the Foundation for support of scientific and project activities of students, postgraduate students, and young scientists “National Intellectual Resource” for the Rosneft shallow stratigraphic drilling project data. The authors also thank E. G. Raevskaya and V. A. Chetverova for their valuable remarks in the original draft.
About the Authors
E. S. Razumkova
All-Russian Geological Research Institute of A. P. Karpinsky
Россия
Competing Interests:
Россия
Elena S. Razumkova, MSc (Geology), Leading Engineer, Department of Stratigraphy and Paleontology
Scopus Author ID 54953281500
Saint Petersburg
Competing Interests:
the authors declare no conflicts of interest
E. V. Zamaraev
All-Russian Geological Research Institute of A. P. Karpinsky
Россия
Competing Interests:
Россия
Evgenii V. Zamaraev, MSc (Geology), First Category Technician, Department of Stratigraphy and Paleontology
Saint Petersburg
Competing Interests:
the authors declare no conflicts of interest
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For citations:
Razumkova E.S., Zamaraev E.V. Paleoecological conditions of the Middle Triassic (Anisian) in the Kara Sea based on palynology and sporomorph ecogroup analysis (SEG). Regional Geology and Metallogeny. 2025;32(4 (104)):103-112. (In Russ.) https://doi.org/10.52349/0869-7892_2025_104_103-112
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