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6th Bone Diagenesis Meeting - Special Volume in P3
Here are two papers submitted in P3, in relation with the 6th Bone Diagenesis
Size and size distribution of apatite crystals in sauropod fossil bones
Dumont M., Kotska A., Sander P.M., Borbely A.& Kaysser-Pyzalla A. In press.
Palaeogeography, Palaeoclimatology, Palaeoecology
Two complementary techniques, X-ray diffraction and transmission
electron microscopy, were used to analyze the size and size distribution
of apatite crystallites in subfossil mammal and fossil sauropod
dinosaur bones. The transmission electron microscope (TEM) samples were
prepared by Focused Ion Beam (FIB). X-ray diffraction indicates that
crystals in sauropod bones are larger than in subfossil mammal bones.
For sauropods the average crystallite size (both in length and width)
does not seem to increase with bone length. A similar result was
obtained from TEM investigations regarding crystallites aspect ratio
(length/width). The distribution of crystallite sizes in a juvenile
sauropod was found to be much wider compared to an adult bone
originating from the same bed and locality, consistent with the
hypothesis that young animal bone contains a mixture of crystallite
sizes, with a beneficial effect on mechanical properties. Diagenesis
effects on crystal size dimensions have been considered.
Fossil bones and teeth: Preservation or alteration of biogenic compositions?
Tütken T.& Vennemann T.W. In press*.
*Palaeogeography, Palaeoclimatology, Palaeoecology