DOI: 10.1016/j.palaeo.2017.06.023
论文题名: Messinian salinity crisis record under strong freshwater input in marginal, intermediate, and deep environments: The case of the North Aegean
作者: Karakitsios V. ; Cornée J.-J. ; Tsourou T. ; Moissette P. ; Kontakiotis G. ; Agiadi K. ; Manoutsoglou E. ; Triantaphyllou M. ; Koskeridou E. ; Drinia H. ; Roussos D.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
语种: 英语
英文关键词: Akropotamos
; Desiccation
; Evaporites
; North Aegean Sea
; Oil and gas field
; Travertine
英文摘要: In the present study, we investigate the Mediterranean-Paratethys connection during the late Miocene in Strymon Basin (North Aegean, northeastern Mediterranean) and compare this onshore sequence with the adjacent offshore Prinos-Nestos sequence, before, during, and after the Messinian Salinity Crisis (MSC). Strymon Basin was a peripheral shallow-water basin during the first MSC stage. The Akropotamos sections expose a clastic sequence with gypsum intercalations, which is dated in the Messinian based on the ostracod and calcareous nannofossil assemblages. This sequence records the Primary Lower Gypsum deposition in a shallow marine environment and its passage via the Messinian erosional surface to a brackish environment with changing salinity conditions similar to the Paratethyan depositional environments. The sequence is capped by a travertine marker horizon observed across the entire Strymon Basin indicating freshwater environment. The Miocene-Pliocene transition is characterized by salinity changes caused by the interaction between Atlantic-Mediterranean and Paratethyan waters, predating the marine reflooding at the end of the MSC, which is attested by the overlying Pliocene open marine deposits. The offshore Prinos-Nestos basin incorporates the Nestos intermediate basin and the Prinos intermediate-deep basin. Borehole and seismic profile data from the offshore Prinos-Nestos oil field reflect a thick clastic sequence, topped by turbidites, and followed by an evaporitic unit deposited during the Messinian. In the Nestos slope area, the evaporite unit consists of anhydrite-shale alternations. Toward the basin's depocenter (Prinos Basin), anhydrite is replaced by halite. The sequence is overlain by Pliocene-Holocene deltaic prograding deposits. Sedimentologic and biostratigraphic data show that the thick halite-shale couplets in the deepest part of the offshore Prinos-Nestos Basin were deposited under permanent marine conditions, suggesting no desiccation before, during, and after the MSC. Conclusively, the present results indicate that a connection between the Mediterranean and the Paratethys was occasionally established before the Pliocene reflooding and favor the non-desiccation MSC model for the deep marine evaporite deposition. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68078
Appears in Collections: 过去全球变化的重建
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作者单位: National and Kapodistrian University of Athens, Faculty of Geology and Geoenvironment, Department of Historical Geology and Paleontology, 15784, Athens, Greece; Géosciences Montpellier, CNRS, Université de Montpellier, Montpellier, France; Univ Lyon, Université Lyon 1, Ens de Lyon, CNRS, UMR 5276 LGL-TPE, 69622 Villeurbanne, France; Technical University of Crete, School of Mineral Resources Engineering, GR - 731 00 Chania, Greece
Recommended Citation:
Karakitsios V.,Cornée J.-J.,Tsourou T.,et al. Messinian salinity crisis record under strong freshwater input in marginal, intermediate, and deep environments: The case of the North Aegean[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01