DOI: 10.1016/j.gloplacha.2012.05.004
论文题名: A magnetostratigraphic time frame for Plio-Pleistocene transgressions in the South Caspian Basin, Azerbaijan
作者: Van Baak C.G.C. ; Vasiliev I. ; Stoica M. ; Kuiper K.F. ; Forte A.M. ; Aliyeva E. ; Krijgsman W.
刊名: Global and Planetary Change
ISSN: 0921-8360
出版年: 2013
卷: 103, 期: 1 起始页码: 119
结束页码: 134
语种: 英语
英文关键词: Akchagylian
; Apsheronian
; Magnetostratigraphy
; Plio-pleistocene
; Productive series
; South caspian basin
Scopus关键词: Akchagylian
; Apsheronian
; Magnetostratigraphy
; Plio-pleistocene
; Productive series
; South Caspian
; Productive Series
; Animals
; Geomagnetism
; Lithology
; Sea level
; Salinity measurement
; magnetite
; magnetostratigraphy
; ostracod
; paleoenvironment
; Pliocene-Pleistocene boundary
; sea level change
; timescale
; transgression
; biostratigraphy
; deltaic deposit
; demagnetization
; Azerbaijan
; Caspian Sea
; Kura Basin
; Caspian Basin
; Ostracoda
英文摘要: The isolation of the Caspian Sea took place in the latest Miocene coincidingwith a significant lowering of sea level and the deposition of a massive lowstand deltaic system. This so-called Productive Series is the main reservoir unit of the South Caspian oil-province. The Productive Series is overlain by marine clays from the Akchagylian and Apsheronian regional stages. During the Plio-Pleistocene, the Caspian basin experienced several short periods of intermittent connectivity with other marine basins. This work aims to create integrated, highresolution, bio-magnetostratigraphic dating of these regional transgressions in key sections of the South Caspian Basin in Azerbaijan. We sample two long sections, the Lokbatan section in the Palaeo-Volga delta and the Xocashen section in the Kura Basin. Palaeoenvironmental reconstructions are derived from characteristic ostracod species. Rock magnetic analyses combined with thermal demagnetisation data indicate that the magnetic signal is carried dominantly by the iron oxide magnetite in the Productive Series of Lokbatan section and in the Xocashen section. The marine Akchagylian and Apsheronian of Lokbatan are characterised by the iron sulphide greigite, which appears to be of (near-) primary origin. The most logical correlation of themagnetic polarity patterns to the Geomagnetic Polarity Time Scale dates the Akchagylian transgression at ~3.2 Ma, a major transgression during the Apsheronian at ~2.0 Ma and the Bakunian transgression at 0.85-0.89 Ma. Ostracod assemblages indicate increasing salinities during these transgressions, from fresh water lacustrine to brackishmarine species. This implies thatmarine connections have been createdwith an adjacent basin that has a higher salinity, most likely the Black Sea. © 2012 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878263164&doi=10.1016%2fj.gloplacha.2012.05.004&partnerID=40&md5=882f2f4bf55c8dfcbe2298a7804fd286
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11266
Appears in Collections: 全球变化的国际研究计划
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作者单位: Paleomagnetic Laboratory Fort Hoofddijk, Utrecht University, Budapestlaan 17, 3584 CD, Utrecht, Netherlands
Recommended Citation:
Van Baak C.G.C.,Vasiliev I.,Stoica M.,et al. A magnetostratigraphic time frame for Plio-Pleistocene transgressions in the South Caspian Basin, Azerbaijan[J]. Global and Planetary Change,2013-01-01,103(1).