DOI: 10.1016/j.palaeo.2012.02.028
论文题名: Uranium in aragonitic marine bivalve shells
作者: Gillikin D.P. ; Dehairs F.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 373 起始页码: 60
结束页码: 65
语种: 英语
英文关键词: Diagenesis
; Mollusk
; Uranium
; Vital effect
英文摘要: Uranium concentrations in foraminiferal and coral skeletons track oceanic [CO3 2-] and can be useful as a proxy of ocean acidification, but this pH proxy is yet to be investigated in bivalves. Two Saxidomus giganteus shells from the industrialized Puget Sound (WA, USA) and one from the more pristine Kodiak Island (AK, USA) were sampled through ontogeny for U/Ca using laser ablation inductively coupled mass spectrometry. All three shells show a similar pattern of seasonal U/Ca cycles during the first six years of life, followed by a sharp decrease to below the detection limit for the remainder of the clams life (10-20years), consistent with a biological or ontogenic forcing (vital effect). However, analyses along a growth-line (carbonate formed at the same time) show a decrease in U/Ca from the outside of the shell toward the inside, consistent with diagenesis. Clearly U/Ca is not under environmental control in these aragonite shells, but the cause of the variability is not currently clear. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69823
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Geology, Union College, 807 Union St., Schenectady, NY 12308, United States; Department of Analytical and Environmental, Chemistry and Earth System Sciences Research Group, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
Recommended Citation:
Gillikin D.P.,Dehairs F.. Uranium in aragonitic marine bivalve shells[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,373