Spatial Distribution of Glycine and Aspartic Acid in Frozen Enceladus Brines Relevant to Enceladus ...
Saturn’s moon Enceladus harbors a global, subsurface liquid ocean beneath an icy crust that actively erupts water jets from cracks in its south pole. Data returned from the Cassini mission have identified the presence of salts and organic matter within these ejected plume particles. Such combination...
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2023
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| Online Access: | https://dx.doi.org/10.48577/jpl.33qhgp https://dataverse.jpl.nasa.gov/citation?persistentId=doi:10.48577/jpl.33QHGP |
| Summary: | Saturn’s moon Enceladus harbors a global, subsurface liquid ocean beneath an icy crust that actively erupts water jets from cracks in its south pole. Data returned from the Cassini mission have identified the presence of salts and organic matter within these ejected plume particles. Such combinations of water, organics, and salts present rather complex chemical environments that may hold direct implications for habitability. In particular, the fundamental behavior of organics in frozen brine systems upon exposure to relevant Enceladus surface conditions is an important aspect that has not been explored to date (e.g. how they organize and partition relative to the salt minerals within the ice matrix). The present work investigates this topic by characterizing the spatial distribution of two representative amino acids (glycine and aspartic acid) in a putative frozen Enceladus brine containing sodium, chloride, and carbonate ions via micro-Raman imaging. The results show that both amino acid-bearing solutions ... |
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