Foraminiferal Assemblages and Microfacies Analysis of Triassic − Jurassic Boundary Successions in Bitlis Massif Carbonates, Eastern Türkiye: Insights Into Depositional Environments and Paleoenvironmental Changes

dc.authorscopusid 36774402100
dc.authorscopusid 60104636500
dc.contributor.author Atakul-Özdemir, Ayşe
dc.date.accessioned 2025-09-30T16:36:06Z
dc.date.available 2025-09-30T16:36:06Z
dc.date.issued 2025
dc.department T.C. Van Yüzüncü Yıl Üniversitesi en_US
dc.department-temp [Atakul-Özdemir] Ayşe, Van Yüzüncü Yıl Üniversitesi, Van, Turkey; [null] null, Van Yüzüncü Yıl Üniversitesi, Van, Turkey en_US
dc.description.abstract Triassic-Jurassic boundary carbonate deposits of the Bitlis Massif (Çakmakkaya village, Elazığ, Türkiye) are considered to delineate paleoenvironmental changes, extinction events, and post-extinction recovery patterns through a combined approach of foraminiferal biostratigraphy and microfacies analysis. The studied sequences representing the most complete records of this boundary in eastern Türkiye are mainly dominated by peritidal carbonates. A high-resolution biostratigraphic investigation has defined four main biozones: (1) Aulotortus ex gr. sinuosus Assemblage Zone (Norian), (2) Triasina hantkeni Range Zone (Norian-Rhaetian), (3) Thaumatoporella sp. Zone (Hettangian), and (4) Everticyclammina sp. Zone (Sinemurian). The Late Triassic interval of the successions is generally characterized by involutinid forms, which abruptly disappear at the Triassic-Jurassic boundary. Following this extinction, the Early Jurassic is generally depicted by fossil-poor levels dominated by Thaumatoporella algae and by the appearance of siphovalvulinids and everticyclammins. The extinction of Triasina hantkeni and the disappearance of particular benthic foraminifers depict the Triassic-Jurassic boundary within the studied carbonate sequences, consistent with other Tethyan carbonate successions. Detailed microfacies analyses have revealed distinct microfacies types, suggesting a depositional model encompassing a transition from low-energy lagoonal environments to high-energy shoal settings and open marine conditions. The biotic events and microfacies characteristics underscore the global impact of this boundary event on the shallow marine carbonate platforms. © 2025 Elsevier B.V., All rights reserved. en_US
dc.identifier.doi 10.1016/j.jseaes.2025.106808
dc.identifier.issn 1367-9120
dc.identifier.scopus 2-s2.0-105016403995
dc.identifier.scopusquality Q1
dc.identifier.uri https://doi.org/10.1016/j.jseaes.2025.106808
dc.identifier.uri https://hdl.handle.net/20.500.14720/28607
dc.identifier.volume 294 en_US
dc.identifier.wosquality Q2
dc.language.iso en en_US
dc.publisher Elsevier Ltd en_US
dc.relation.ispartof Journal of Asian Earth Sciences en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.subject Bitlis Massif en_US
dc.subject Microfacies Analysis en_US
dc.subject Triasina hantkeni en_US
dc.subject Triassic-Jurassic Boundary en_US
dc.title Foraminiferal Assemblages and Microfacies Analysis of Triassic − Jurassic Boundary Successions in Bitlis Massif Carbonates, Eastern Türkiye: Insights Into Depositional Environments and Paleoenvironmental Changes en_US
dc.type Article en_US
dspace.entity.type Publication

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