Study of fossil bones by synchrotron radiation micro-spectroscopic techniques and scanning electron microscopy

Journal of Synchrotron Radiation
I M ZougrouE Tsoukala

Abstract

Earlymost Villafranchian fossil bones of an artiodactyl and a perissodactyl from the Milia excavation site in Grevena, Greece, were studied in order to evaluate diagenetic effects. Optical microscopy revealed the different bone types (fibro-lamellar and Haversian, respectively) of the two fragments and their good preservation state. The spatial distribution of bone apatite and soil-originating elements was studied using micro-X-ray fluorescence (µ-XRF) mapping and scanning electron microscopy. The approximate value of the Ca/P ratio was 2.2, as determined from scanning electron microscopy measurements. Bacterial boring was detected close to the periosteal region and Fe bearing oxides were found to fill bone cavities, e.g. Haversian canals and osteocyte lacunae. In the perissodactyl bone considerable amounts of Mn were detected close to cracks (the Mn/Fe weight ratio takes values up to 3.5). Goethite and pyrite were detected in both samples by means of metallographic microscopy. The local Ca/P ratio determined with µ-XRF varied significantly in metal-poor spots indicating spatial inhomogeneities in the ionic substitutions. XRF line scans that span the bone cross sections revealed that Fe and Mn contaminate the bones from both th...Continue Reading

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Citations

Jul 22, 2015·Biological Trace Element Research·Korakot NganvongpanitChatchote Thitaram
Jul 6, 2016·Die Naturwissenschaften·I M ZougrouE C Paloura
Aug 6, 2016·Anatomical Science International·Korakot NganvongpanitChatchote Thitaram
May 18, 2017·Scientific Reports·Korakot NganvongpanitKongkiat Kittiwatanawong

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