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Paleoenvironmental Interpretations of Irati and Mangrullo Formations (Permian of Paraná Basin) Based on Rocks and Fossil Bones Through Spectroscopy Techniques
Vibrational Spectroscopy ( IF 2.7 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.vibspec.2020.103110
Leonardo Corecco de Queiroz , Thiago Carlisbino , Enzo V.H. Agressott , Alexandre R. Paschoal , Paulo de Tarso C. Freire , Bartolomeu C. Viana Neto , João H. da Silva

Abstract The hydroxyapatite of fossil bones can provide paleoenvironmental information, because throughout the fossil-diagenetic process, the fossils can incorporate elements from the sedimentary rocks that involved them. In this way, the present study aimed for geochemical patterns in mesosaurid bones and their respective host rocks to project the paleoenvironmental conditions at deposition/diagenesis’ time. For this purpose, Raman Spectroscopy and X-Ray Fluorescence analysis were performed. The samples came from Irati (S1 – Sao Matues do Sul, S2 – Assistencia, S4 – Acegua e S5 – Sao Gabriel) and Mangrullo (S3 – Uruguay) Formations. We found similar geochemical composition between S1 and S5; S3 and S4 which also indicates a similar paleoenvironmental context. The samples S1 and S5 have relatively high Al, Si and Sr contents which can represent acidic conditions and high depths. The second set (S3 and S4) have similar contents of Al, Si and Ca, but it is worth to note that the Si and Ca contents are slightly different. The Si and Ca contents suggest that S3 was slightly deeper and less acidic when compared to S4. In general, the first set (S1 and S5) were deeper and more acidic than the second (S3 and S4). The S2 sample is out of line with the others, corresponding to shallow or coastal and more basic paleoenvironment. Overall, our results agree with previous studies about the past environment where mesosaurs lived. Also, shows that spectroscopy techniques are reliable and should be used to refine paleoenvironmental interpretations.

中文翻译:

基于岩石和化石骨骼的 Irati 和 Mangrullo 地层(巴拉那盆地二叠纪)的古环境解释通过光谱技术

摘要 骨骼化石中的羟基磷灰石可以提供古环境信息,因为在整个化石成岩过程中,化石可以结合涉及它们的沉积岩中的元素。通过这种方式,本研究旨在研究中龙类骨骼及其各自寄主岩的地球化学模式,以预测沉积/成岩时的古环境条件。为此,进行了拉曼光谱和 X 射线荧光分析。样本来自 Irati(S1 – Sao Matues do Sul、S2 – Assistencia、S4 – Acegua e S5 – Sao Gabriel)和 Mangrullo(S3 – 乌拉圭)地层。我们发现 S1 和 S5 之间的地球化学成分相似;S3 和 S4 也表明了类似的古环境背景。样品 S1 和 S5 具有较高的 Al,Si和Sr含量可以代表酸性条件和高深度。第二组(S3和S4)的Al、Si和Ca含量相似,但值得注意的是Si和Ca含量略有不同。Si 和 Ca 含量表明,与 S4 相比,S3 略深且酸性较弱。一般来说,第一组(S1 和 S5)比第二组(S3 和 S4)更深、更酸。S2 样本与其他样本不一致,对应于浅层或沿海和更基本的古环境。总的来说,我们的结果与之前关于中​​龙过去生活环境的研究一致。此外,表明光谱技术是可靠的,应用于完善古环境解释。但值得注意的是,Si 和 Ca 的含量略有不同。Si 和 Ca 含量表明,与 S4 相比,S3 略深且酸性较弱。一般来说,第一组(S1 和 S5)比第二组(S3 和 S4)更深、更酸。S2 样本与其他样本不一致,对应于浅层或沿海和更基本的古环境。总的来说,我们的结果与之前关于中​​龙过去生活环境的研究一致。此外,表明光谱技术是可靠的,应用于完善古环境解释。但值得注意的是,Si 和 Ca 的含量略有不同。Si 和 Ca 含量表明,与 S4 相比,S3 略深且酸性较弱。一般来说,第一组(S1 和 S5)比第二组(S3 和 S4)更深、更酸。S2 样本与其他样本不一致,对应于浅层或沿海和更基本的古环境。总的来说,我们的结果与之前关于中​​龙过去生活环境的研究一致。此外,表明光谱技术是可靠的,应用于完善古环境解释。S2 样本与其他样本不一致,对应于浅层或沿海和更基本的古环境。总的来说,我们的结果与之前关于中​​龙过去生活环境的研究一致。此外,表明光谱技术是可靠的,应用于完善古环境解释。S2 样本与其他样本不一致,对应于浅层或沿海和更基本的古环境。总的来说,我们的结果与之前关于中​​龙过去生活环境的研究一致。此外,表明光谱技术是可靠的,应用于完善古环境解释。
更新日期:2020-09-01
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