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Preliminary assessment of the use of electron backscatter diffraction (EBSD) in conodonts

Citation
Perez-Huerta A, Cusack M & Mendez CA (2012) Preliminary assessment of the use of electron backscatter diffraction (EBSD) in conodonts, Lethaia, 45 (2), pp. 253-258.

Abstract
Conodonts are extensively used as 'geochemical tools' in palaeoenvironmental reconstructions in Palaeozoic and Triassic strata. The retention of a primary geochemical signal is substantially dependent on the ultrastructural integrity and crystallinity after diagenesis. Direct assessments of the preservation potential of the polycrystalline matrix are scarce with the exception of the application of transmission electron microscopy (TEM). The possible application of electron backscatter diffraction (EBSD) is introduced for well-preserved Pennsylvanian platform conodont elements as a novel in situ technique based on successful previous results for biogenic carbonates. EBSD shows the presence of no diffraction in central regions of all studied elements of Idiognathodus and Adetognathus, with possible implications for geochemistry analysis. The absence of diffraction could be attributed to the existence of an amorphous phase, water (+OH) or a process of hypocalcification related to the development of 'growth cavities' in the lamellar crown tissue. Overall results indicate the suitability of using EBSD to extract crystallographic information from conodonts and potentially for other apatite (micro-) fossils. © 2011 The Authors, Lethaia © 2011 The Lethaia Foundation.

StatusPublished
AuthorsPerez-Huerta Alberto, Cusack Maggie, Mendez Carlos A
Publication date04/2012
Publication date online20/06/2011
PublisherWiley-Blackwell
ISSN 0024-1164

Journal
Lethaia: Volume 45, Issue 2 (2012)

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