2026-06-08T23:17:16Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/1054562025-03-18T13:27:44Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Sánchez Pastor, Nuria author Fesharaki Tabatabaei, Omid author Hernando Alonso, Ana Isabel 2024-07-02T15:11:49Z 2024-07-02T15:11:49Z 2024-06-01 Sánchez-Pastor, Nuria, et al. «A Multi-Technique Approach to Characterize the Composition and Color of the Fossil Remains of the “Húmera Paleontological Site” from Spain». Episodes, vol. 47, n.o 2, junio de 2024, pp. 279-93, https://doi.org/10.18814/epiiugs/2024/024008 0705-3797 10.18814/epiiugs/2024/024008 https://hdl.handle.net/20.500.14352/105456 2586-1298 https://doi.org/10.18814/epiiugs/2024/024008 https://www.episodes.org/journal/view.html?volume=47&number=2&spage=279&vmd=Full This paper combines a variety of physicochemical non-destructive techniques to obtain a knowledge of the chemical and mineralogical composition of the scarce fossil bones from the Húmera paleontological site (Madrid, Spain). The main classification of the samples has distinguished six colors: red, gray, blue, white, light yellow and green. μ-XRD and Raman spectroscopy have been correlated to study the structure and to distinguish between fluorapatite, chlorapatite, bioapatite and carbonated bones. The bones have further been classified in three main types. Type I includes gray, green, white, and blue samples, classified as fluorapatite and chlorapatite containing organic matter and adsorbed water. Type II, includes the red sample classified as bioapatite, showing broad Raman bands and μ-XRD peaks due to the lattice disorder created by the B-type substitutions emerging from a high matter content. Type III sample (yellow) shows a complete replacement of apatite by calcite which induce the high porosity of the sample. Diagenetic changes add further complexity to the structure of fossil bones, not only by new ionic substitutions but also in terms of biogenic or authigenic phases that form in the fossilizing bone. The multi-technique approach from a broad interdisciplinary perspective enables a better understanding of bone fossilization. eng Attribution-NonCommercial 4.0 International A multi-technique approach to characterize the composition and color of the fossil remains of the “Húmera Paleontological Site” from Spain journal article 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URL https://docta.ucm.es/bitstreams/b360eabf-3501-46e8-8fb7-80c2835cca03/download File MD5 147419a6ecf8518facb76587bd82dcba 6003254 application/pdf A multi-technique approach to characterize the composition and color.pdf URL https://docta.ucm.es/bitstreams/87de75a7-6836-439f-bb53-7fa590be690a/download File MD5 8bc0f7190f0a75c87d59215da4929a2b 74712 text/plain A multi-technique approach to characterize the composition and color.pdf.txt