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- W3208512773 abstract "The preservation of biosignatures on Mars is largely associated with extensive deposits of clays formed under mild early Noachian conditions (> 3.9 Ga). They were followed by widespread precipitation of acidic sulfates considered adverse for biomolecule preservation. In this paper, an exhaustive mass spectrometry investigation of ferric subsurface materials in the Rio Tinto gossan deposit (~ 25 Ma) provides evidence of well-preserved molecular biosignatures under oxidative and acidic conditions. Time of flight secondary ion mass spectrometry (ToF-SIMS) analysis shows a direct association between physical-templating biological structures and molecular biosignatures. This relation implies that the quality of molecular preservation is exceptional and provides information on microbial life formerly operating in the shallow regions of the Rio Tinto subsurface. Consequently, low-pH oxidative environments on Mars could also record molecular information about ancient life in the same way as the Noachian clay-rich deposits." @default.
- W3208512773 created "2021-11-08" @default.
- W3208512773 creator A5001680940 @default.
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- W3208512773 date "2021-11-02" @default.
- W3208512773 modified "2023-10-18" @default.
- W3208512773 title "Unveiling microbial preservation under hyperacidic and oxidizing conditions in the Oligocene Rio Tinto deposit" @default.
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