通过 3D-XRM 和 FIB-SEM 组合方法确定埃迪卡拉胚胎样化石的结构和化学特征

IF 4.1 2区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Qian Chen, Weichen Sun, Suping Wu, Zongjun Yin
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引用次数: 0

摘要

化石的三维(3D)形态、解剖和原位化学成分分析对于系统古生物学和确定其系统发育位置至关重要。扫描电子显微镜(SEM)与能量色散 X 射线光谱(EDS)相结合,为化石分析提供了宝贵的结构和化学信息。然而,其主要局限性在于只能获得二维表面数据,从而限制了对化石三维复杂性的探索。与此相反,三维 X 射线显微镜(3D-XRM),也被称为一种新型的微计算机断层扫描(micro-CT),有助于对化石标本进行非破坏性的三维重建。然而,它缺乏提供原位成分数据的能力。认识到这些单项技术固有的局限性,并针对古生物学研究不断发展的要求,本研究引入了一种将 3D-XRM 与 EDS 耦合聚焦离子束扫描电子显微镜(FIB-SEM)相结合的综合方法。这种创新策略旨在协同两种技术的优势,从而应对传统方法无法应对的挑战。它能以微米级的分辨率快速识别化石标本中的感兴趣区(ROI)。随后,该方法可收集已确定 ROI 的三维结构和纳米尺度化学成分的详细数据。这种综合方法代表了古生物学和地质学研究方法的重大进步,有望满足这些领域日益增长的需求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural and Chemical Characterization of the Ediacaran Embryo-Like Fossils via the Combination of 3D-XRM and FIB-SEM Approaches

The three-dimensional (3D) morphology, anatomy, and in-situ chemical composition analysis of fossils are crucial for systematic paleontology and determining their phylogenetic positions. Scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS), offers valuable structural and chemical information for the analysis of fossils. However, its primary limitation is the restriction to two-dimensional surface data, which limits the exploration of fossils’ 3D complexities. Conversely, 3D X-ray microscopy (3D-XRM), also known as a novel form of micro-computed tomography (micro-CT) facilitates the non-destructive 3D reconstruction of fossil specimens. Nevertheless, it lacks the capability to provide in-situ compositional data. Acknowledging the constraints inherent in these individual techniques, and in response to the evolving requirements of paleontological research, this study introduces an integrated approach that combines 3D-XRM with EDS-coupled focused ion beam scanning electron microscopy (FIB-SEM). This innovative strategy is designed to synergize the advantages of both techniques, thereby addressing challenges that conventional methods cannot. It enables the rapid identification of regions of interest (ROI) within fossil specimens at micrometer resolution. Subsequently, this method collects detailed data on both 3D structures and chemical compositions at the nanometer scale for the identified ROI. This integrated approach represents a significant advancement in paleontological and geological research methodologies, promising to meet the increasing demands of these fields.

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来源期刊
Journal of Earth Science
Journal of Earth Science 地学-地球科学综合
CiteScore
5.50
自引率
12.10%
发文量
128
审稿时长
4.5 months
期刊介绍: Journal of Earth Science (previously known as Journal of China University of Geosciences), issued bimonthly through China University of Geosciences, covers all branches of geology and related technology in the exploration and utilization of earth resources. Founded in 1990 as the Journal of China University of Geosciences, this publication is expanding its breadth of coverage to an international scope. Coverage includes such topics as geology, petrology, mineralogy, ore deposit geology, tectonics, paleontology, stratigraphy, sedimentology, geochemistry, geophysics and environmental sciences. Articles published in recent issues include Tectonics in the Northwestern West Philippine Basin; Creep Damage Characteristics of Soft Rock under Disturbance Loads; Simplicial Indicator Kriging; Tephra Discovered in High Resolution Peat Sediment and Its Indication to Climatic Event. The journal offers discussion of new theories, methods and discoveries; reports on recent achievements in the geosciences; and timely reviews of selected subjects.
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