DOI: 10.1016/j.palaeo.2016.10.021
论文题名: Assessing elemental ratios as a paleotemperature proxy in the calcite shells of patelloid limpets
作者: Graniero L.E. ; Surge D. ; Gillikin D.P. ; Briz i Godino I. ; Álvarez M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 465 起始页码: 376
结束页码: 385
语种: 英语
英文关键词: Carbon isotopes
; Elemental ratios
; Oxygen isotopes
; Paleoceanography
; Paleotemperature
; Patelloid limpets
英文摘要: Archaeological shell and fish middens are rich sources of paleoenvironmental proxy data. Patelloid limpet shells are common constituents in archaeological middens found along European, African, and South American coastlines. Paleotemperature reconstructions using oxygen isotope ratios of limpet shells depend on the ability to constrain the oxygen isotope ratio of seawater; therefore, alternative proxies are necessary for coastal localities where this is not possible. The study evaluates whether Mg/Ca, Sr/Ca, Li/Ca, Li/Mg, and Sr/Li ratios are reliable proxies of sea surface temperature (SST) in the calcite layer of shells of the patelloid limpets, Patella vulgata and Nacella deaurata. We compare Mg/Ca, Sr/Ca, Li/Ca, Li/Mg, and Sr/Li ratios to the seasonal variations in contemporaneous δ18Oshell values, which primarily record seasonal changes in SST. Elemental ratios (Mg/Ca, Sr/Ca, Li/Ca, Li/Mg, and Sr/Li) show no significant correlations with reconstructed SST in P. vulgata and N. deaurata shells, nor do they show sinusoidal cycles expected from a SST proxy. In addition, shell δ13C values show no significant ontogenetic trends, suggesting that these limpets exhibit little change in metabolic carbon incorporation into the shell with increasing ontogenetic age. Although shell growth rate exhibits a logarithmic decrease with age based on calculated linear extension rates, growth rate does not correlate with elemental profiles in these limpets. Overall, elemental ratios are not reliable recorders of paleotemperature in patelloid limpets. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68161
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geological Sciences, University of North Carolina Chapel Hill, 104 South Road, Chapel Hill, NC, United States; Department of Geology, Union College, 807 Union Street, Schenectady, NY, United States; CONICET-Centro Austral de Investigaciones Científicas, Av./B. Houssay, 200, Ushuaia, Argentina; Department of Archaeology, University of York, The King's Manor, York, United Kingdom; ICSE-UNTDF, Av./Alem, 1036, Ushuaia, Argentina
Recommended Citation:
Graniero L.E.,Surge D.,Gillikin D.P.,et al. Assessing elemental ratios as a paleotemperature proxy in the calcite shells of patelloid limpets[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,465