Plate tectonics on exoplanets/moon.

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The minimum mass for an exoplanet or moon to sustain plate tectonics is suggested to be around 0.2 Earth masses. However, the presence of water is crucial for lubricating the tectonic plates. Additional factors influencing plate tectonics include the body's rotation, tidal effects from nearby celestial bodies, and the internal heat of the planet or moon. Even smaller planets or moons can potentially maintain sufficient internal heat for tectonic activity. Overall, multiple conditions must be met for plate tectonics to occur on exoplanets or moons.
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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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