Dione’s History of Tectonic Disruption · 2017-02-22 · Dione’s History of Tectonic Disruption...
Transcript of Dione’s History of Tectonic Disruption · 2017-02-22 · Dione’s History of Tectonic Disruption...
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Dione’s History of Tectonic Disruption
Emily S. Martin D. Alex Patthoff
Jessica McDaniel Thomas R. Watters
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Cassini
Motivation*
Voyager
Motivations & Approach What caused the pulse of tectonic activity driving the formation of the wispy terrains?
1) Characterize the morphology and distribution of tectonic and linear structures in the wispy
terrains of the trailing hemisphere 2) Use mapped fracture patterns to compare with theoretical stress models to constrain
possible stress mechanisms
Voyager
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N1507748228 20 km
50 km N1662198128 N1662197108
Characterization: Recent
Scar
ps
“Tw
in S
carp
s”
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Characterization: Ancient
Ridges Trough Scarp
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Preliminary Modeling Results Build a Dione using previously published rheological estimates using SatStressGUI (Patthoff et al., 2016) Consider fracturing when magnitudes reach 1-2 MPa Diurnal Tidal Stress Nonsynchronous Rotation (10ky, 100ky, 1My, 10My) Ice Shell Thickening
(Not to scale!)
333km
50km
175km
3km