Abstract
Full text: Sauropod dinosaurs were typically one magnitude larger than any other living or extinct terrestrial animal. This sheer size of the sauropod leads to scale effects in their biology and physiology that still are only inadequately understood. The primary remnants of the sauropods are their fossilized bones. These fossilized bones have sustained burial for some hundred million years and thus may have experienced significant diagenetic changes which are not affecting bone preservation at the histological level, but lead to significant alterations of the bone microstructure at the sub histological level. We investigated the influence of diagenesis on the microstructure of fossilized sauropod bones using bone cross sections of Brachiosaurus brancai and Barosaurus africanus long bones (femura and humeri) that were excavated from the Tendaguru beds in Tanzania. The change in chemical composition due to interactions between bone and sediments was characterized by synchrotron micro-X-ray fluorescence analysis (SR l'-XRF) in confocal geometry. Measurements have been carried out at the micro-focus end-station at HASYLAB beamline L using a monochromatic synchrotron beam from a bending magnet at 17.2 KEXV. The high spatial resolution achievable using this variant of SR l'-XRF revealed two-dimensional element maps of U, Sr, Pb, Fe, Cu, Mn, V,
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Zoeger, N;
Wobrauschek, P;
Streli, C;
Jokubonis, C;
[1]
Pepponi, G;
[2]
FalKEXnberg, G;
[3]
Sander, P M;
[4]
Ferreyro, R;
Pyzalla, A R
[5]
- TU Wien, Atominstitiut der Oesterreichischen Universitaeten, Stadionallee 2, A-1020 Wien (Austria)
- ITC-irst, Centro per la Ricerca Scientifica e Tecnologica, via Sommarive 18, 38050 Povo, Trento (Italy)
- Hamburger Synchrotronstrahlungslabor HASYLAB am Deutschen Elektronen-Synchrotron, NotKEXstr. 85, 22603 Hamburg (Germany)
- Institute for Paleontology, University of Bonn, Nussallee 8, D-53115 Bonn (Germany)
- TU Wien, Institute of Material Science and Technology, Karlsplatz 13-308, A-1040 Wien (Austria)
Citation Formats
Zoeger, N, Wobrauschek, P, Streli, C, Jokubonis, C, Pepponi, G, FalKEXnberg, G, Sander, P M, Ferreyro, R, and Pyzalla, A R.
Synchrotron {mu}-XRF determination of element distribution in fossilized sauropod bones.
Austria: N. p.,
2005.
Web.
Zoeger, N, Wobrauschek, P, Streli, C, Jokubonis, C, Pepponi, G, FalKEXnberg, G, Sander, P M, Ferreyro, R, & Pyzalla, A R.
Synchrotron {mu}-XRF determination of element distribution in fossilized sauropod bones.
Austria.
Zoeger, N, Wobrauschek, P, Streli, C, Jokubonis, C, Pepponi, G, FalKEXnberg, G, Sander, P M, Ferreyro, R, and Pyzalla, A R.
2005.
"Synchrotron {mu}-XRF determination of element distribution in fossilized sauropod bones."
Austria.
@misc{etde_20779846,
title = {Synchrotron {mu}-XRF determination of element distribution in fossilized sauropod bones}
author = {Zoeger, N, Wobrauschek, P, Streli, C, Jokubonis, C, Pepponi, G, FalKEXnberg, G, Sander, P M, Ferreyro, R, and Pyzalla, A R}
abstractNote = {Full text: Sauropod dinosaurs were typically one magnitude larger than any other living or extinct terrestrial animal. This sheer size of the sauropod leads to scale effects in their biology and physiology that still are only inadequately understood. The primary remnants of the sauropods are their fossilized bones. These fossilized bones have sustained burial for some hundred million years and thus may have experienced significant diagenetic changes which are not affecting bone preservation at the histological level, but lead to significant alterations of the bone microstructure at the sub histological level. We investigated the influence of diagenesis on the microstructure of fossilized sauropod bones using bone cross sections of Brachiosaurus brancai and Barosaurus africanus long bones (femura and humeri) that were excavated from the Tendaguru beds in Tanzania. The change in chemical composition due to interactions between bone and sediments was characterized by synchrotron micro-X-ray fluorescence analysis (SR l'-XRF) in confocal geometry. Measurements have been carried out at the micro-focus end-station at HASYLAB beamline L using a monochromatic synchrotron beam from a bending magnet at 17.2 KEXV. The high spatial resolution achievable using this variant of SR l'-XRF revealed two-dimensional element maps of U, Sr, Pb, Fe, Cu, Mn, V, Cr, Co in the fluorapatite of the fossilized bone and in the calcite filling of the bone cavities. The results show distinct differences in the spatial distribution of these elements. The inhomogeneities of the element distribution observed in the dinosaur bone thus give some indications about the interdiffusion between the bone and its environment. (author)}
place = {Austria}
year = {2005}
month = {Jul}
}
title = {Synchrotron {mu}-XRF determination of element distribution in fossilized sauropod bones}
author = {Zoeger, N, Wobrauschek, P, Streli, C, Jokubonis, C, Pepponi, G, FalKEXnberg, G, Sander, P M, Ferreyro, R, and Pyzalla, A R}
abstractNote = {Full text: Sauropod dinosaurs were typically one magnitude larger than any other living or extinct terrestrial animal. This sheer size of the sauropod leads to scale effects in their biology and physiology that still are only inadequately understood. The primary remnants of the sauropods are their fossilized bones. These fossilized bones have sustained burial for some hundred million years and thus may have experienced significant diagenetic changes which are not affecting bone preservation at the histological level, but lead to significant alterations of the bone microstructure at the sub histological level. We investigated the influence of diagenesis on the microstructure of fossilized sauropod bones using bone cross sections of Brachiosaurus brancai and Barosaurus africanus long bones (femura and humeri) that were excavated from the Tendaguru beds in Tanzania. The change in chemical composition due to interactions between bone and sediments was characterized by synchrotron micro-X-ray fluorescence analysis (SR l'-XRF) in confocal geometry. Measurements have been carried out at the micro-focus end-station at HASYLAB beamline L using a monochromatic synchrotron beam from a bending magnet at 17.2 KEXV. The high spatial resolution achievable using this variant of SR l'-XRF revealed two-dimensional element maps of U, Sr, Pb, Fe, Cu, Mn, V, Cr, Co in the fluorapatite of the fossilized bone and in the calcite filling of the bone cavities. The results show distinct differences in the spatial distribution of these elements. The inhomogeneities of the element distribution observed in the dinosaur bone thus give some indications about the interdiffusion between the bone and its environment. (author)}
place = {Austria}
year = {2005}
month = {Jul}
}