In the course of the analyses, it turned out that they contained primordial metabolism—and thus energy sources for life. The results of Lüders’ carbon isotope analysis provided additional evidence for different carbon sources. While the gas-rich inclusions of gray barites contained traces of magmatic carbon, clear evidence of an organic origin of the carbon could be found in the fluid inclusions of black barites.
Follow-up research is possible
“The study may create a big stir,” Lüders says. Organic molecules of this type have not yet been found so far in fluid inclusions in Archean minerals. At the same time, however, he says the study is just a first step. Lüders says, “The ever-increasing sensitivity of measuring instruments will provide new tools for the study of solid and fluid micro inclusions in minerals. Measurements of bio signatures and isotope ratios are likely to become increasingly accurate in the near future.”
Helge Mißbach et al, Ingredients for microbial life preserved in 3.5 billion-year-old fluid inclusions, Nature Communications (2021). DOI: 10.1038/s41467-021-21323-z
Preconditions for life already present 3.5 billion years ago (2021, March 31)
retrieved 31 March 2021
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