[Space] Resources on Icy Terrestrial World

[Zeta Blaze]

Originally Posted by Flyndaran

Where did you read that Io or Europa have magnetic fields?
I can't find confirmation that any rocky, let alone ice, bodies having anything approaching Earth's magnetic field.

I do not remember the first place herd that I think it was in collage when discussing the water ice based vulcanism of the two moons.
The flowing links looks promising as a single scholarly confirmation.
A Magnetic Signature at Io: Initial Report from the Galileo Magnetometer
http://www.ncbi.nlm.nih.gov/pubmed/8662516
an excerpt can be found
http://www.astronomycafe.net/qadir/q1056.html

This is consistent with what I remembered when I wrote my post. Io appears to have a notable, though not earth scale, magnetic field. Without doing the math I assumed that would be strong enough to at least concentrate interesting charged particle impacts, and thus captures, around the moons magnetic poles.

As for Europa you appear to be correct it seems to have a tiny induced field from Jupiter but would likely not have one if not in orbit of a huge Magnet like Jupiter. That being said the magnetic bombardment i talked about is still a phenomenon that Europa experience because of Jupiter's magnetic field.
https://solarsystem.nasa.gov/europa/faq.cfm

If the body in the OP is orbiting a gas giant that could be the explanation. If Krinberry likes that explanation but the moon is not orbiting a suitably magnetic host then it could be an escaped moon that ether settled into an orbit in say the asteroid belt or around another planet.