DOI: 10.1016/j.quascirev.2014.09.018
Scopus记录号: 2-s2.0-84910070037
论文题名: Paleoclimate and paleoceanography over the past 20,000yr in the Mediterranean Sea Basins as indicated by sediment elemental proxies
作者: Martinez-Ruiz F. ; Kastner M. ; Gallego-Torres D. ; Rodrigo-Gámiz M. ; Nieto-Moreno V. ; Ortega-Huertas M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 107 起始页码: 25
结束页码: 46
语种: 英语
英文关键词: Elemental ratios
; Marine records
; Mediterranean basins
; Paleoceanographic conditions
; Paleoclimate
; Paleoproductivity
; Redox proxies
; Terrigenous input
Scopus关键词: Barite
; Climate change
; Deposition
; Inorganic compounds
; Magnesium
; Minerals
; Repair
; Sediments
; Submarine geology
; Titanium
; Trace elements
; Underwater mineralogy
; Zirconium
; Elemental ratios
; Marine record
; Mediterranean basin
; Paleoceanographic conditions
; Paleoclimates
; Paleoproductivity
; Redox proxies
; Terrigenous inputs
; Uranium
; environmental change
; marine sediment
; paleoceanography
; paleoclimate
; paleoproductivity
; proxy climate record
; Quaternary
; reconstruction
; redox conditions
; terrigenous deposit
; trace element
; Mediterranean Sea
英文摘要: Marine sediments record paleoenvironmental changes over time through variations in major and trace element concentrations. The main objective of this paper is to review such changes in the Mediterranean Sea basins over the last 20 ka, using the inorganic chemistry and mineralogy of marine sediment records. Elemental ratio proxies that are mostly used are discussed, and the uncertainties involved in using them for paleoclimate and paleoceanographic reconstructions are evaluated. The focus on the Mediterranean region is based on the sensitivity of this region to global climate changes due to its semi-enclosed nature. The elemental ratios that have been particularly useful for reconstructing terrigenous inputs into the Mediterranean have been Ti/Al and Zr/Al ratios as proxies for eolian dust input, and Mg/Al, K/Al and Rb/Al ratios as proxies for fluvial input. Redox sensitive elements (e.g., U, Mo, V, Co, Ni, Cr) have provided reliable reconstructions of oxygen conditions at the time of deposition. Some of these elements are also particularly susceptible to post-depositional remobilization and record diagenetic processes instead of the original environmental signatures. Regarding productivity fluctuations, most of the paleoproductivity reconstructions are based on the abundance of barite and Ba excess algorithms. The biogeochemistry of Ba is, however, not fully understood and mechanisms for barite precipitation in the water column are not yet known. Two case studies are presented: the eastern Mediterranean sapropel S1 (deposited between 10.8 and 6.1calka BP) and the westernmost Mediterranean paleoclimate record over the last 20 ka. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60073
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Instituto Andaluz de Ciencias de la Tierra (IACT), Consejo Superior de Investigaciones Científicas-Universidad de Granada (CSIC-UGR), Avda. Las Palmeras 4, Armilla, Granada, Spain; Scripps Institution of Oceanography, UCSD, 9500 Gilman Drive, La Jolla, CA, United States; Depto. Mineralogía y Petrología, Facultad de Ciencias, Universidad de Granada, Granada, Spain; NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Organic Biogeochemistry, Postbus 59, AB Den Burg, Texel, Netherlands; LOEWE, Biodiversität und Klima Forschungszentrum BiK-F, Frankfurt am Main, Germany
Recommended Citation:
Martinez-Ruiz F.,Kastner M.,Gallego-Torres D.,et al. Paleoclimate and paleoceanography over the past 20,000yr in the Mediterranean Sea Basins as indicated by sediment elemental proxies[J]. Quaternary Science Reviews,2015-01-01,107