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DOI:	10.1371/journal.pone.0086946
论文题名:	Trace Elemental Imaging of Rare Earth Elements Discriminates Tissues at Microscale in Flat Fossils
作者:	Pierre Gueriau; Cristian Mocuta; Didier B. Dutheil; Serge X. Cohen; Dominique Thiaudière; The OT1 Consortium; Sylvain Charbonnier; Gaël Clément; Loïc Bertrand
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2014
发表日期:	2014-1-29
卷:	9, 期:1
语种:	英语
英文关键词:	Fossils ; Paleobiology ; Trace elements ; Neodymium ; Synchrotrons ; X-ray radiography ; Yttrium ; Marine fossils
英文摘要:	The interpretation of flattened fossils remains a major challenge due to compression of their complex anatomies during fossilization, making critical anatomical features invisible or hardly discernible. Key features are often hidden under greatly preserved decay prone tissues, or an unpreparable sedimentary matrix. A method offering access to such anatomical features is of paramount interest to resolve taxonomic affinities and to study fossils after a least possible invasive preparation. Unfortunately, the widely-used X-ray micro-computed tomography, for visualizing hidden or internal structures of a broad range of fossils, is generally inapplicable to flattened specimens, due to the very high differential absorbance in distinct directions. Here we show that synchrotron X-ray fluorescence spectral raster-scanning coupled to spectral decomposition or a much faster Kullback-Leibler divergence based statistical analysis provides microscale visualization of tissues. We imaged exceptionally well-preserved fossils from the Late Cretaceous without needing any prior delicate preparation. The contrasting elemental distributions greatly improved the discrimination of skeletal elements material from both the sedimentary matrix and fossilized soft tissues. Aside content in alkaline earth elements and phosphorus, a critical parameter for tissue discrimination is the distinct amounts of rare earth elements. Local quantification of rare earths may open new avenues for fossil description but also in paleoenvironmental and taphonomical studies.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0086946&type=printable
Citation statistics:
资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/20137
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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File Name/ File Size	Content Type	Version	Access	License
journal.pone.0086946.PDF（10529KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

CR2P, UMR 7207 CNRS, MNHN, UPMC, Paris, France;IPANEMA, USR 3461 CNRS, MCC, Gif-sur-Yvette, France;Synchrotron SOLEIL, Gif-sur-Yvette, France;15 passage du Buisson Saint-Louis, Paris, France;IPANEMA, USR 3461 CNRS, MCC, Gif-sur-Yvette, France;Synchrotron SOLEIL, Gif-sur-Yvette, France;CR2P, UMR 7207 CNRS, MNHN, UPMC, Paris, France;CR2P, UMR 7207 CNRS, MNHN, UPMC, Paris, France;IPANEMA, USR 3461 CNRS, MCC, Gif-sur-Yvette, France;Synchrotron SOLEIL, Gif-sur-Yvette, France

Recommended Citation:

Pierre Gueriau,Cristian Mocuta,Didier B. Dutheil,et al. Trace Elemental Imaging of Rare Earth Elements Discriminates Tissues at Microscale in Flat Fossils[J]. PLOS ONE,2014-01-01,9(1)

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