[Rockhounds] BASIC geo-chem question...

[Mike Flannigan]

I was going to say that HF does not occur naturally
in nature, but this article:
https://en.wikipedia.org/wiki/Hydrofluoric_acid
says I am wrong about that.

It says:
Hydrofluoric acid can be found in nature, having been
released in a volcanic eruption.



Mike


On 1/28/20 2:00 PM, rockhounds-request at rockhounds.drizzle.com wrote:
> I live in an area where the rock units are largely sedimentary and
> specifically, for the most part, limestone. Within the limestone there
> is? not a LOT of variety of minerals, but often we find Fluorite. I
> understand that minerals can precipitate and form in the ooze of the
> sediment by concentration, chemical reactions, salinity, and ph. What I
> am curious about is, was the fluorite always present in diluted amounts
> in the limestone, or where did the fluorine originate? Was it present as
> HF and reacted with the Ca of the limestone?? Just curious if anyone has
> any knowledge of this. NOT looking for an absolute, but perhaps a
> predominance of occurrence??