晚白垩世恐龙牙齿Ca、Sr同位素及微量元素综合分析：饮食与成岩作用的对比

IF 4.5 1区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Geochimica et Cosmochimica Acta Pub Date : 2025-05-06 DOI:10.1016/j.gca.2025.05.006

Mateusz M. Michailow, Federico Lugli, Anna Cipriani, Francesco Della Giustina, Annalisa Ferretti, Daniele Malferrari, Denver Fowler, Elizabeth Freedman Fowler, Michael Weber, Thomas Tütken

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引用次数: 0

摘要

牙齿化石中Sr和Ca同位素组成以及微量元素的含量为研究牙齿的生物成因和成岩过程提供了有价值的信息。识别原始生物信号对于重建灭绝类群的饮食和营养水平至关重要。本文利用放射性Sr （87Sr/86Sr）、稳定Sr （δ88/86Sr）和Ca （δ44/42Ca）同位素以及微量元素丰度，对晚白垩世霸王龙科和角鼻科牙齿进行了地球化学分析，以区分成岩蚀变的生物成因信号。

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Combined Ca, Sr isotope and trace element analyses of Late Cretaceous dinosaur teeth: assessing diet versus diagenesis

The Sr and Ca isotope composition, along with trace element content in fossil teeth, provides valuable insights into biogenic and diagenetic processes. Identifying pristine biological signals is crucial for reconstructing the diet and trophic levels of extinct taxa. We present novel geochemical data from Tyrannosauridae and Ceratopsidae teeth of the Late Cretaceous, using radiogenic Sr (87Sr/86Sr), stable Sr (δ88/86Sr), and Ca (δ44/42Ca) isotopes, along with trace elements abundances to differentiate biogenic signals from diagenetic alteration.

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来源期刊

Geochimica et Cosmochimica Acta 地学-地球化学与地球物理

CiteScore

9.60

自引率

14.00%

发文量

437

审稿时长

6 months

期刊介绍： Geochimica et Cosmochimica Acta publishes research papers in a wide range of subjects in terrestrial geochemistry, meteoritics, and planetary geochemistry. The scope of the journal includes: 1). Physical chemistry of gases, aqueous solutions, glasses, and crystalline solids 2). Igneous and metamorphic petrology 3). Chemical processes in the atmosphere, hydrosphere, biosphere, and lithosphere of the Earth 4). Organic geochemistry 5). Isotope geochemistry 6). Meteoritics and meteorite impacts 7). Lunar science; and 8). Planetary geochemistry.