DOI: 10.1016/j.palaeo.2015.03.027
论文题名: The Holocene Black Sea reconnection to the Mediterranean Sea: New insights from the northeastern Caucasian shelf
作者: Ivanova E.V. ; Marret F. ; Zenina M.A. ; Murdmaa I.O. ; Chepalyga A.L. ; Bradley L.R. ; Schornikov E.I. ; Levchenko O.V. ; Zyryanova M.I.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 427 起始页码: 41
结束页码: 61
语种: 英语
英文关键词: Dinoflagellate cysts
; Foraminifers
; Molluscs
; Ostracods
; Palaeoenvironment
; Sedimentation
英文摘要: Recent findings about the evolution of palaeogeographic conditions of the Black Sea during the Holocene have significantly improved our understanding of the profound environmental changes that took place around 9ka ago, when the Neoeuxinian Lake reconnected to the global ocean. In contrast to the western and southeastern regions where numerous studies have been recently performed, the northeast region remains relatively under investigated. We carried out the first multi-proxy continuous study of a sediment core (Ak-2575) from the northeastern Black Sea shelf that includes benthic calcareous fossils (ostracods, molluscs and foraminifers), dinoflagellate cysts (dinocysts) and sedimentology, thus providing reconstructions of surface and bottom-water conditions. The age model of the core is based on 10 AMS-14C dates. Calibrated ages are used throughout the manuscript. The first appearance of Mediterranean elements is documented at 9.6cal.kaBP. Our data provide evidence of sustained cohabitation of benthic species of Caspian and Mediterranean origins, represented by different ontogenetic stages, from at least ~7.8 (or even 8.8) to 6.7cal.kaBP with the gradual disappearance of brackish species suggesting a gradual increase in salinity and most likely a change in the salt composition. Dinocyst assemblages show species succession that is coherent across the Black Sea basin, with brackish taxa dominating until ~8.5cal.kaBP and being slowly replaced by euryhaline species. The occurrences of authigenic gypsum crystals, especially abundant at ~7.4 and 6.5cal.kaBP, suggest the temporal appearance of hydrogen sulphide at the shelf edge which during certain periods appears to reduce the abundance of benthic fauna. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68945
Appears in Collections: 过去全球变化的重建
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作者单位: P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russian Federation; School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; Institute of Geography, Russian Academy of Sciences, Moscow, Russian Federation; A.V. Zhirmunsky Institute of Marine Biology, Far East Division RAS, Vladivostok, Russian Federation
Recommended Citation:
Ivanova E.V.,Marret F.,Zenina M.A.,et al. The Holocene Black Sea reconnection to the Mediterranean Sea: New insights from the northeastern Caucasian shelf[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,427