Identification of conodont fossils in pelagic deep‐sea siliceous sedimentary rocks using laboratory‐based X‐ray computed microtomography
Identification of conodont fossils in pelagic deep‐sea siliceous sedimentary rocks using laboratory‐based X‐ray computed microtomography
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DOI：
10.1111/let.12432
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发表时间：
2021-06
期刊：
影响因子：
1.5
通讯作者：
Shun Muto;S. Yagyu;S. Takahashi;M. Murayama
中科院分区：
文献类型：
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作者：
Shun Muto;S. Yagyu;S. Takahashi;M. Murayama
本研究首次描述了一种利用实验室X射线计算机显微断层扫描技术在深海沉积岩（燧石岩和硅质粘土岩）中观察牙形石元素的方法。通过精心制备嵌在岩石样品中的牙形刺和处理层析切片，我们成功地产生了具有足够高空间分辨率的三维图像，用于在物种水平上识别牙形刺。本研究中建立的方法通过观察常规酸溶法无法提取的标本，大大提高了获得牙形石数据的效率。光学显微镜观察岩石表面牙形刺的角度不受限制，也有利于观察岩石表面牙形刺。X射线显微镜的使用将促进生物地层学的高分辨率研究，也将有助于对远洋深海沉积岩中牙形刺形态特征的定量测量。
This study provides a description of a method of observing conodont elements in pelagic deep‐sea sedimentary rocks (chert and siliceous claystone) using laboratory‐based X‐ray computed microtomography for the first time. By careful preparation of conodonts embedded in rock samples and processing of tomographic sections, we managed to produce 3D images with high enough spatial resolutions for identification of conodonts at the species level. The method established in this study drastically increases the efficiency of obtaining conodont data by allowing the observation of specimens that are impossible to extract by the conventional acid dissolution methods. It is also advantageous to observation of conodonts on rock surfaces using optical microscopes in that the angle of view is unrestricted. The use of X‐ray microscopes will promote high‐resolution investigations of biostratigraphy and will also be useful in the quantitative measurement of morphological characters of conodonts in pelagic deep‐sea sedimentary rocks.