Applications of chemical imaging techniques in paleontology

• 来源期刊: 国家科学评论（英文版）
• 关键词: trace elements isotopic information organic biomarkers fossil materials limits and obstacles
• 年，卷（期）: 2019,（5）
• 页码范围: 1040-1053
• 页数: 14页
• 语种: 英文
• DOI: 10.1093/nsr/nwy107

摘要

Chemical imaging techniques,based on a combination of microscopy and spectroscopy,are designed to analyse the composition and spatial distribution of heterogeneous chemical complexes within a sample.Over the last few decades,it has become an increasingly popular tool for characterizing trace elements,isotopic information and organic biomarkers (molecular biosignatures) found in fossils.Here,we introduce the analytical principle of each technique and the interpretation of the chemical signals,followed by a review of the main applications of these techniques in paleontology.We also demonstrate that each technique is associated with pros and cons,and the current limitations and obstacles associated with the use of each specific technique should be taken into account before being applied to fossil samples.Finally,we propose that,due to the rapid advances in the available technology and overall trends towards more multi-disciplinary studies in paleontology,chemical imaging techniques can be expected to have broader applications in paleontology in the near future.