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Evidence for young volcanism on Mercury from the third MESSENGER flyby
Louise M Prockter1, Carolyn M Ernst, Brett W Denevi
1Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA. Louise.Prockter@jhuapl.edu
Science (New York, N.Y.)
|July 22, 2010
Summary
MESSENGER spacecraft data reveal extensive early volcanism on Mercury. Evidence suggests volcanic activity, including explosive vents, persisted for a significant duration, potentially into the later solar system history.
Area of Science:
- Planetary Science
- Volcanology
- Impact Cratering
Background:
- The MESSENGER spacecraft provided crucial data on Mercury's geological evolution.
- Previous observations indicated early volcanic activity on Mercury.
Purpose of the Study:
- To analyze data from MESSENGER's flybys to understand Mercury's volcanism.
- To investigate the origin and timing of geological features on Mercury.
Main Methods:
- Analysis of high-resolution images from MESSENGER spacecraft flybys.
- Spectral analysis of surface features, including smooth plains and impact basins.
- Geological interpretation of volcanic landforms and impact structures.
Main Results:
- Confirmation of pervasive early volcanism on Mercury.
- Discovery of a young, 290-km peak-ring basin with spectrally distinct, smooth plains of volcanic origin.
- Identification of a large candidate explosive volcanic vent with bright deposits.
Conclusions:
- Mercury's volcanism was widespread and occurred over a prolonged period.
- Volcanic plains within the peak-ring basin indicate effusive volcanism postdating basin formation.
- The findings suggest volcanic activity on Mercury may have extended well into the second half of solar system history.
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