Instead of "global heat flows" would not simple heat generated by gravity account for many formations? Determinig the rate of cooling is important here.

I don't accept the "spherules" as artifacts of acid precipitations, when impact better accounts for their perfectly shperical shapes, iron compositions, and where they are found. Impact is well attested. I wonder what their platinum group composition is?

Finally, you're using the word "ice", when "clathrate" is the proper term for deposits of the type you are describing.

I am happy to see that you're finall managing to talk about the working fluid as "acid" instead of "water", but you still need to be specific about what kind of acid.