Chemical identification of microfossils from the 1.88‐Ga Gunflint chert: Towards empirical biosignatures using laser ablation ionization mass spectrometer

نویسندگان

چکیده

In this contribution, we investigated the chemical composition of Precambrian microfossils from Gunflint chert (1.88 Ga) using a miniature laser ablation ionization mass spectrometer (LIMS) developed for in situ space applications. Spatially resolved spectrometric imaging (MSI) and depth profiling resulted acquisition 68,500 spectra. Using single unit spectral decomposition multivariate data analysis techniques, identified location aggregations surrounding inorganic host mineral. Our results show that have unique compositions can be distinguished with high fidelity. Chemical also LIMS microprobe data, it is possible to identify differences between individual microfossils, thereby providing new insights about nature early life. Analysis spectra acquired reveals complex mineralization, which reflect metabolic diversity microbiome. An intensity-based machine learning model trained on might applied future investigations putative silicified matrices, where morphological integrity structures lost, potentially investigation rocks Martian surface.

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ژورنال

عنوان ژورنال: Journal of Chemometrics

سال: 2021

ISSN: ['1099-128X', '0886-9383']

DOI: https://doi.org/10.1002/cem.3370