DOI: 10.1002/2015GL063758
论文题名: Temporal stability and origin of chemoclines in the deep hypersaline anoxic Urania basin
作者: Goldhammer T. ; Schwärzle A. ; Aiello I.W. ; Zabel M.
刊名: Geophysical Research Letters
ISSN: 0094-8668
EISSN: 1944-8399
出版年: 2015
卷: 42, 期: 12 起始页码: 4888
结束页码: 4895
语种: 英语
英文关键词: chemoclines
; deep hypersaline basins
; geochemical modeling
; suspended sediment
; thermal convection
Scopus关键词: Geochemistry
; Solute transport
; Suspended sediments
; Chemoclines
; Concentration gradients
; Eastern Mediterranean
; Geochemical modeling
; Geochemical process
; Hypersaline
; Microbial communities
; Thermal convections
; Heat convection
; brine
; concentration (composition)
; diffusion
; earthquake event
; geochemistry
; hypersaline environment
; lake water
; Messinian
; microbial community
; seawater
; solute transport
; stratification
; submarine channel
; sulfide
; suspended sediment
; thermal convection
; Mediterranean Sea
; Mediterranean Sea (East)
; Urania Basin
; Urania
英文摘要: Submarine brine lakes feature sharp and persistent concentration gradients between seawater and brine, though these should be smoothed out by free diffusion in open ocean settings. The anoxic Urania basin of the eastern Mediterranean contains an ultrasulfidic, hypersaline brine of Messinian origin above a thick layer of suspended sediments. With a dual modeling approach we reconstruct its contemporary stratification by geochemical solute transport fundamentals and show that thermal convection is required to maintain mixing in the brine and mud layer. The origin of the Urania basin stratification was dated to 1650 years B.P., which may be linked to a major earthquake in the region. The persistence of the chemoclines may be key to the development of diverse and specialized microbial communities. Ongoing thermal convection in the fluid mud layer may have important yet unresolved consequences for sedimentological and geochemical processes, also in similar environments. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84948712457&doi=10.1002%2f2015GL063758&partnerID=40&md5=f116b6d711e7f22b57dd928dc721ff90
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8284
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Inorganic Geochemistry, MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Recommended Citation:
Goldhammer T.,Schwärzle A.,Aiello I.W.,et al. Temporal stability and origin of chemoclines in the deep hypersaline anoxic Urania basin[J]. Geophysical Research Letters,2015-01-01,42(12).