Alyssa Rhoden at #LPSC2023: cryovolcanusm on Pluto's moon Charon.

Idea is that freezing ocean cracked Charon ice shell, and then caused cryovolcanic bloops.

So they modeled it up. (Recently published)

They added ammonia. Not sure if ammonia is there or not. But it affects temperature of freezing (makes it lower).

Makng Fractures is easy, but...making eruptions is hard. (10 km thick or thinner for a through fracture.)

Link to abstract: https://www.hou.usra.edu/meetings/lpsc2023/pdf/2941.pdf

Julie Castillo-Rogez at #LPSC2023:

Looking at evolution of Uranian moons. Clathrate hydrates of CO2 don't form because any CO2 goes into carbonates.

Miranda may not have a deep ocean... but maybe it is there? Worth a look!

General pattern:
Differentiation-->Hydrosphere Freezing-->Thermal metamorphism-->Resonance Melting->Freezing to Present time

Conclusion: Relict oceans. Unless tidal heating for Miranda.

Link to abstract: https://www.hou.usra.edu/meetings/lpsc2023/pdf/1808.pdf

Tara Tomlinson et al. Permeability and porosity of ice. At #LPSC2023.

Mushy zones in ice. How to nutrients and salts get formed and connected during ice Freetown?

(Y'all know I'm all into this for #astrobiology. This sets #microhabitats scale in #DeepIce.)

Modeled, and compared with lab grown sea ice.

Abstract: https://www.hou.usra.edu/meetings/lpsc2023/pdf/1998.pdf

Henry Dawson presenting on tectonic activity potential of Europa or Enceladus seafloor at #LPSC2023.

(Points from me for mentioning getting trace metals for catalytic enzymes into potential biosphere for #astrobiology, just a passing mention, but got me all happy.)

Can tides fracture sea floor?

Calculation path: Pressure to porosity to cohesion (rock stronger under compression than tension).
...More math.

Answer: Tidal forces not enough.
More optios..see abstract: https://www.hou.usra.edu/meetings/lpsc2023/pdf/2822.pdf