DOI: 10.1016/j.palaeo.2014.09.006
论文题名: Early diagenesis of elephant tusk in marine environment
作者: Albéric M. ; Gourrier A. ; Müller K. ; Zizak I. ; Wagermaier W. ; Fratzl P. ; Reiche I.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 416 起始页码: 120
结束页码: 132
语种: 英语
英文关键词: Chemical depth profiling
; Elephant ivory
; Marine early diagenesis
; Micro-structural variations
; μPIXE/PIGE/RBS/EBS
; μSAXS
英文摘要: Three elephant tusks recovered from a 18th century Dutch shipwreck in Brittany seawaters were analyzed to study early diagenetic changes of ivory in a marine environment. Micro-small angle X-ray scattering (μSAXS) analysis revealed sub-microscopic structural modifications of ivory (hydroxyapatite particle thickness, mineralized collagen fibers organization and orientation). Chemical compositional changes of the organic fraction (nitrogen and carbon loss) and of the mineral part (magnesium loss, carbonate, calcium, chlorine and strontium uptake) were investigated by non-invasive micro-Particle Induced X-ray Emission/Gamma-ray Emission/Rutherford and Elastic Backscattering Spectrometry analysis (μPIXE/PIGE/RBS/EBS). These chemical and structural markers can serve as proxies for the early diagenesis of elephant tusk in marine settings. The results show that the macroscopic preservation state of the tusk surface does not reflect its microscopic preservation state. A diagenetic sequence is proposed, depending on the local environment of each tusk. First, collagen hydrolysis and ion adsorptions from the marine environment are proposed to occur. Second, a tusk buried in the sand was protected from Ca enrichment of the surface and the formation of a flaky white concretion whereas tusks out of the sand were subjected to these latter phenomena as well as sea-urchin attacks. Third, ion leaching and uptake, increased crystallinity of the hydroxyapatite crystals, and the modifications of the mineralized collagen fiber network are assumed to happen for all three tusks with different level of completion. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69152
Appears in Collections: 过去全球变化的重建
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作者单位: Laboratoire d'Archéologie Moléculaire et Structurale (LAMS), UMR 8220 CNRS UPMC Paris VI, Paris, France; Department of Biomaterials, Max-Planck Institute of Colloids and Interfaces, Potsdam, Germany; Laboratoire Interdisciplinaire de Physique (LIPhy), UMR 5588 CNRS Université Grenoble Alpes, France; European Synchrotron Radiation Facility, Grenoble, France; BESSY II, Helmholtz-Zentrum für Materialien und Energien, Berlin, Germany; Rathgen Research Laboratory, National Museums in Berlin, Prussian Cultural Heritage Foundation, Berlin, Germany
Recommended Citation:
Albéric M.,Gourrier A.,Müller K.,et al. Early diagenesis of elephant tusk in marine environment[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,416