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Updated: Feb 22, 2026

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
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Charon tectonics.

Ross A Beyer1,2, Francis Nimmo3, William B McKinnon4

  • 1Sagan Center at the SETI Institute, 189 Berndardo Ave, Mountain View, California 94043, USA.

Icarus
|September 19, 2017
PubMed
Summary
This summary is machine-generated.

New Horizons images reveal Charon, Pluto's companion, has extensional tectonic features. These geological signs suggest Charon may have once harbored a global ocean, now frozen.

Keywords:
CharonGeological processesImage processingPlutoTectonics

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Area of Science:

  • Planetary Science
  • Geology
  • Astrobiology

Background:

  • Charon, Pluto's largest moon, exhibits diverse surface terrains.
  • Previous observations hinted at geological activity on Charon.

Purpose of the Study:

  • To analyze the geological features of Charon using New Horizons data.
  • To investigate the implications of observed tectonic features for Charon's history.

Main Methods:

  • Analysis of high-resolution imagery from the New Horizons spacecraft.
  • Interpretation of geological landforms, focusing on tectonic features.

Main Results:

  • Charon displays significant extensional tectonic features across its surface.
  • These features indicate a global extensional strain of approximately 1% early in its history.
  • The observed geological activity is surprising given Charon's small size.

Conclusions:

  • The extensional tectonics are consistent with the presence of a past subsurface ocean.
  • Charon's geological evolution may have involved significant internal processes, potentially driven by an ancient ocean.