Universität zu Köln

Decree, Sophie, Herwartz, Daniel ORCID: 0000-0003-3604-8295, Mercadier, Julien, Mijan, Ismael, de Buffrenil, Vivian, Leduc, Thierry and Lambert, Olivier ORCID: 0000-0003-0740-5791 (2018). The post-mortem history of a bone revealed by its trace element signature: The case of a fossil whale rostrum. Chem. Geol., 477. S. 137 - 151. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1878-5999

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Abstract

Studies dedicated to palaeoenvironments and taphonomy have made wide use of rare earth elements (REE) contents of fossil bones as proxies. However, the complex diagenetic history of individual specimens combined with intra-bone REE fractionation and the uncertain timing of REE uptake generally prevents the robust interpretation of REE patterns. In this case study we show that combining REE analysis with, on the one hand, histology and microstructural observations and, on the other hand, additional analyses of other trace elements, allows deciphering at least three distinct trace element uptake stages, as well as one leaching event. More than 35 trace elements (including the REE) are analysed using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) within compact rostrum bones of the Miocene-Pliocene beaked whale Globicetus hiberus from deep-sea deposits and a comparable extant specimen (Blainville's beaked whale Mesoplodon densirostris). Comparison of the extinct and the extant bones allows a better quantification of the diagenetic trace element content. This study highlights the crucial role played by diagenetic minerals such as the Fe-Mn oxyhydroxides in the uptake and release of trace elements (Co, Ni, Ti, V, Zr, Hf and Nb) and REE by bones, in response to changes of the diagenetic fluid redox conditions over time. Such changes of the geochemical environment help constraining the post-mortem history of the bone and its interaction with diagenetic fluids. We conclude that the unique interpretation of geochemical proxies within individual fossil bones requires a thorough investigation of each individual specimen.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Decree, Sophie UNSPECIFIED UNSPECIFIED UNSPECIFIED Herwartz, Daniel UNSPECIFIED orcid.org/0000-0003-3604-8295 UNSPECIFIED Mercadier, Julien UNSPECIFIED UNSPECIFIED UNSPECIFIED Mijan, Ismael UNSPECIFIED UNSPECIFIED UNSPECIFIED de Buffrenil, Vivian UNSPECIFIED UNSPECIFIED UNSPECIFIED Leduc, Thierry UNSPECIFIED UNSPECIFIED UNSPECIFIED Lambert, Olivier UNSPECIFIED orcid.org/0000-0003-0740-5791 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-198645
DOI:	10.1016/j.chemgeo.2017.12.021
Journal or Publication Title:	Chem. Geol.
Volume:	477
Page Range:	S. 137 - 151
Date:	2018
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	1878-5999
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RARE-EARTH-ELEMENTS; HYDROGENETIC FERROMANGANESE CRUSTS; HF ISOTOPE SYSTEMATICS; DEEP-SEA SEDIMENTS; VERTEBRATE MICROREMAINS; MESOPLODON-DENSIROSTRIS; GEOCHEMICAL CLUES; BIOGENIC APATITES; ATLANTIC-OCEAN; PORE FLUIDS Multiple languages Geochemistry & Geophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19864