Comparison of the microstructural parameters and composition (organic and mineral phases) of modern and fossil mammal bones (Plio-Pleistocene of Angola) show the differential character of diagenesis. Despite excellent preservation of the microstructure, the chemical composition of the mineral phases has been modified (enriched in Ca, reduction of Mg). The amount of preserved organic matrix is greatly reduced. The amino-acid composition of the soluble organic phase appears to be better preserved than that of the insoluble phase.
Plio-Pleistocene, Angola, Theropithecus, Bos, bone, FTIR, amino-acids