DOI: 10.1016/j.quascirev.2014.05.017
Scopus记录号: 2-s2.0-85027927800
论文题名: Geochemical properties and environmental impacts of seven Campanian tephra layers deposited between 40 and 38 ka BP in the varved lake sediments of Lago Grande di Monticchio, southern Italy
作者: Wutke K. ; Wulf S. ; Tomlinson E.L. ; Hardiman M. ; Dulski P. ; Luterbacher J. ; Brauer A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 118 起始页码: 67
结束页码: 83
语种: 英语
英文关键词: Campanian ignimbrite
; Environmental impacts
; Lago Grande di Monticchio
; Reworked tephra
; Tephrochronology
; μ-XRF scanning
Scopus关键词: Catchments
; Deposition
; Deposits
; Ecology
; Glass
; Lakes
; Population statistics
; Sediments
; Trace elements
; Campanian Ignimbrite
; Central Mediterranean
; Ecological response
; Environmental impact study
; Geochemical properties
; Lago Grande di Monticchio
; Reworked tephra
; Tephrochronology
; Environmental impact
; age determination
; Campanian
; diatom
; environmental impact
; geochemical method
; Heinrich event
; ignimbrite
; interstadial
; intertidal environment
; lacustrine deposit
; paleoenvironment
; population growth
; sediment analysis
; tephrochronology
; X-ray fluorescence
; Basilicata
; Italy
; Lago Grande di Monticchio
; Mediterranean Region
; Potenza
; Bacillariophyta
英文摘要: We present the results of new tephrostratigraphical and environmental impact studies of the 40-38 ka varved sediment section of Lago Grande di Monticchio (southern Italy). The sediments in this time zone are correlated with the Heinrich H4-stadial that occurred between Greenland Interstadials GI-9 and GI-8, and include the widespread Campanian Ignimbrite (CI, 39.3 ka) as a thick tephra layer in the middle of the H4 stadial. The CI in the Monticchio record is overlain by the Schiava tephra from Vesuvius, c. 1240 varve-years younger than the CI, and preceded by four tephras from small-scale eruptions of the Phlegrean Fields and by an Ischia-derived tephra. The four Phlegrean Field-derived tephras were deposited 600 varve-years or fewer prior to the deposition of the CI and show very similar major, minor, and trace element glass compositions to those of the CI. This close similarity in composition and age could compromise the accurate linking and synchronisation of palaeoenvironmental records in the central Mediterranean area. Microfacies analyses and μ-XRF core scanning were used to characterise primary and secondary depositional features of all seven tephra layers and to evaluate environmental and ecological responses after tephra deposition. Higher concentrations of tephra-derived material (mainly glass shards and pumices) in primary and reworked layers were detected by elevated K-counts in μ-XRF elemental core scans. Reworked tephra derives mainly from in-washing from the littoral zone and the catchment and occurs within five to 30 years, and up to 1240 varve years, after the deposition of thinner (1-5 mm) and thicker (5-230 mm) tephra fallout deposits, respectively. An obvious response of diatom population growth directly after the primary tephra deposition was observed for the thicker tephra layers (>1 mm) during the first 1-8 years after deposition of the primary deposit indicating that the additional input of potential nutrients (glass shards) temporarily affected the ecological lake system. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60061
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geography, Climatology, Climate Dynamics and Climate Change, Justus-Liebig University, Senckenbergstrasse 1, Giessen, Germany; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section 5.2 - Climate Dynamics and Landscape Evolution, Telegrafenberg, Potsdam, Germany; Department of Geology, Trinity College Dublin, College Green, Dublin 2, Ireland; Centre for Quaternary Research, Department of Geography, Royal Holloway University of London, Surrey, United Kingdom; Department of Geography, University of Portsmouth, Portsmouth, United Kingdom
Recommended Citation:
Wutke K.,Wulf S.,Tomlinson E.L.,et al. Geochemical properties and environmental impacts of seven Campanian tephra layers deposited between 40 and 38 ka BP in the varved lake sediments of Lago Grande di Monticchio, southern Italy[J]. Quaternary Science Reviews,2015-01-01,118