[Rockhounds] West Michigan's geology could be answer to keepingcarbon emissions out of global-warming mix

[Axel Emmermann]

Kreigh,

Mucho interesting idea!
One thought crossed my mind when I found this about sandstone: " Sandstone,
the sedimentary rock is composed of small grains that are cemented by
siliceous, felspathic or calcareous cementing material. The cementing
material determines the durability of the sandstone.

I keep forgetting the name of the reaction but there is a known effect in
which siliceous rock is weathered by CO2 and water into carbonates and sand.
It's the "?????-reaction". I keep forgetting the name but there's a "u" in
it ;-)))
AAAAAHHHHHHUUUGGGGGHHHHHHRRRRRRRRRRRRRR (sound of me having a brainstorm)
Got it: the UREY-reaction. Named after Harold Urey.
CO2 under high pressure could attack feldspars and other silicates. Take
away the cementing mineral from the sandstone and it could collapse. That
would have a fatal effect on the porosity of the layer in the immediate
vicinity of the injection point. 

Normally the Urey reaction is a slow geological process. In this case
however pressure and temperature may be important in speeding the reaction.

Axel 



> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com]
> Namens Kreigh Tomaszewski
> Verzonden: zondag 5 oktober 2008 22:38
> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
> Onderwerp: [Rockhounds] West Michigan's geology could be answer to
keepingcarbon
> emissions out of global-warming mix
> 
> It is not often that the main story on the front page of my local
> newspaper is about geology.
> 
> http://www.mlive.com/grpress/news/index.ssf/2008/10/
> graphic_for_emissions_story.html
> 
> 
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