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May 1, 2026The Planetary Science JournalOpen Access

Raman Spectroscopy of Salt Deposits from the Simulated Subsurface Ocean of Enceladus

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Authors

JTJun TakeshitaYCY H ChoHTHaruhisa Tabata

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Overview

Randomized trial evaluates pH-sensitive minerals from Enceladus’ ocean, suggesting viability for habitability assessment.

Key Points

  • The aim is to assess whether Raman spectroscopy can distinguish between weakly and strongly alkaline pH values in minerals from Enceladus' subsurface ocean.
  • Frozen simulated ocean fluids with pH values of 9 and 11 were analyzed under conditions mimicking Enceladus.
  • Raman spectra were collected using a standoff geometry system designed for space applications.
  • The analysis focused on identifying diagnostic peaks related to carbonate minerals.
  • At pH 9, both NaHCO3 and Na2CO3 signals were detected, while only Na2CO3 was evident at pH 11.
  • Raman spectrometers can distinguish between these mineral phases despite lower resolution.
  • The findings validate the use of in situ Raman spectroscopy for estimating seawater pH on icy moons.

Cite This Study

Takeshita et al. (2026) studied this question.

synapsesocial.com/papers/69f44223967e944ac5565eadhttps://doi.org/10.3847/psj/ae548e
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