DOI: 10.1016/j.quascirev.2014.09.028
Scopus记录号: 2-s2.0-84909633301
论文题名: Paleomagnetism of Lake Van sediments: Chronology and paleoenvironment since 350ka
作者: Vigliotti L. ; Channell J.E.T. ; Stockhecke M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 104 起始页码: 18
结束页码: 29
语种: 英语
英文关键词: Lacustrine sediments
; Lake Van
; Late Quaternary
; Paleoclimate
; Paleomagnetism
Scopus关键词: Lacustrine sediments
; Lake vans
; Late quaternary
; Paleoclimates
; Paleomagnetism
; grain size
; lacustrine deposit
; magnetic intensity
; magnetic susceptibility
; natural remanent magnetization
; paleoclimate
; paleoenvironment
; paleomagnetism
; Quaternary
; sedimentary sequence
; sedimentation rate
; tephra
; Lake Van
; Turkey
英文摘要: In the framework of the PALEOVAN project, a high-resolution paleomagnetic and rock magnetic study was carried out on a 149m sedimentary sequence recovered from Ahlat Ridge in the deepest part of the Lake Van (Eastern Turkey; ICDP Site 5034-2). High sedimentation rates (average ~30cm/ka) allow high-resolution measurements of natural remanent magnetization (NRM), magnetic susceptibility (κ), anhysteretic remanence (ARM) and hence of anhysteretic susceptibility (κARM) over the last 350ka. The carrier of the remanence is detrital titanomagnetite largely from volcanic sources, based on the similarity of magnetite grain size of tephra layers and the other lacustrine lithologies observed in a plot of the κ versus κARM. Bulk magnetic parameters often covary with paleoclimatic signals in the Lake Van sediments. A correlation exists between variations of κ and ARM intensity and glacial-interglacial marine isotopic stages, as well as dust flux and temperatures observed in ice cores from Greenland and Antarctica. The quality of the paleomagnetic record is compromised by weak NRM intensities, as well as by the presence of tephra and turbidites throughout the sequence. Nonetheless, a correlation is observed between the relative paleointensity (RPI) record, based on NRM/ARM, and the calibrated PISO RPI stack, that supports the independently derived age model for the site. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60130
Appears in Collections: 过去全球变化的重建
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作者单位: Istituto di Scienze Marine, ISMAR-CNR, Bologna, Italy; Department of Geological Sciences, University of Florida, Gainesville, FL, United States; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dept. of Surface Waters Dübendorf, Switzerland; ETH Zurich, Geological Institute, Zurich, Switzerland
Recommended Citation:
Vigliotti L.,Channell J.E.T.,Stockhecke M.. Paleomagnetism of Lake Van sediments: Chronology and paleoenvironment since 350ka[J]. Quaternary Science Reviews,2014-01-01,104