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

[Axel Emmermann]

Kreigh,

>From what I've read so far, only the feldspars would be affected.

Without intending to start an off topic ecology debate: I worry more about
methane in the permafrost than about the CO2 of one coal plant ;-))))

Cheers
Axel

> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com]
> Namens Kreigh Tomaszewski
> Verzonden: woensdag 8 oktober 2008 2:10
> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
> Onderwerp: Re: [Rockhounds] West Michigan's geology could be answerto
keepingcarbon
> emissions out of global-warming mix
> 
> Axel,
> 
> The Urey Reaction has CO2 and siliceous rock, in the presence of water,
> converting to SiO2 and carbonates. Cements in the Mount Simon formation
> include quartz and feldspar overgrowths, hematite and kaolinite,
> carbonate, chlorite, and microquartz (chert). See
> http://aapgbull.geoscienceworld.org/cgi/content/abstract/68/6/753.
> 
> Since most of the cements are not affected, it should not be a problem.
> If it were, I suspect it would have shown up in the testing done so
> for. But it is a good question. Since I live over the formation I have
> left a message for the reporter to see if the question came up in his
> research for the article.
> 
> Kreigh
> 
> 
> 
> On Tuesday, Oct 7, 2008, at 05:44 America/Detroit, Axel Emmermann wrote:
> 
> > 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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