[meteorite-list] "Boiling" (?) water in Carancas crater

[Piper R.W. Hollier]

Hello list,

Thanks for the reactions both public and private to my posting to the list 
about sulfur dioxide at Carancas. This thread has also given me a new idea 
about the "boiling" water in the crater. Yes, it may have been the obvious: 
ground water raised to the boiling point by impact heat...

BUT, if there was enough sulfur dioxide generated in the impact to 
significantly acidify the water, what do you get when you put pulverized 
cenozoic limestone in acidic water? Bubbling carbon dioxide, maybe even 
lots and lots of it. One wonders: did anyone actually verify somehow that 
the "boiling" water was hot to the touch? Or might it have been only 
"bubbling" and not "boiling"?

Sterling has added some valuable numeracy to the troilite/SO2 hypothesis by 
tracking down the dissociation temperature of troilite, which is 
surprisingly low: 700 kelvins, or 427 C. That's not all that hot, folks.

Are there professional (geo)chemists out there who would care to comment on 
the credibility of this explanation for what would otherwise seem to be 
some rather odd phenomena?

Piper