Plate tectonics on exoplanets/moon.

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SUMMARY

The minimum mass required for an exoplanet or moon to sustain plate tectonics is established at 0.2 Earth masses. This threshold is contingent upon the presence of water to lubricate tectonic plates. Additional critical factors influencing plate tectonics include the celestial body's rotation, tidal effects from nearby moons, and the internal heat generated within the planet or moon. These elements collectively determine the viability of tectonic activity in smaller celestial bodies.

PREREQUISITES
  • Understanding of planetary geology
  • Knowledge of celestial mechanics
  • Familiarity with the role of water in geological processes
  • Awareness of thermal dynamics in planetary interiors
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  • Research the role of water in tectonic lubrication
  • Study the effects of rotation on planetary geology
  • Explore tidal forces and their impact on exoplanetary bodies
  • Investigate methods for measuring internal heat in celestial bodies
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Astronomers, planetary scientists, geologists, and anyone interested in the geological processes of exoplanets and moons.

KTevolved
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What would be the minimum mass for an exoplanet or moon to sustain plate tectonics? I would think its 0.2 Earth masses.
 
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Yes 0.2 Earth masses sounds right for the very minimal mass for sustained plate tetonics but you would need water to lubricate the plates. There are other factors that come into play also like rotation, tidal effects of a moon, how much heat the interior has. Even a small planet or moon could have enough heat in the interior.
 

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