Greg,
Might a paleoclimate researcher know or find a technique for dating the rate of carbon sink based on sediment cores from olivene beaches? Perhaps relating the sink rate to past air/ocean CO2 concentrations?
Mark
---------- Original Message --------
Subject: Re: [geo] Natural olivine beaches
From: Greg Rau <[email protected]>
Date: Tue, September 30, 2014 8:19 pm
To: "[email protected]" <[email protected]>,
geoengineering <[email protected]>
--Agree that the silicate mineral sand idea needs testing. I'd first start in the lab with a flask of freshly ground olivine in chemically well characterized, sterile seawater. I would then put this on a shaker table in the dark and let the sand and water gently slosh back and forth for a few days and then measure the SW alkalinity and DIC again. this would give you and idea of the efficacy and kinetics under ideal conditions. Measuring this in a beach setting would be trickier, but possible. My guess is that there are synergies with sediment respiration/microbes that hasten silicate weathering. Add in some fresh sediment to the above flask and see what happens.Greg
From: Andrew Lockley <[email protected]>
To: geoengineering <[email protected]>
Sent: Tuesday, September 30, 2014 11:28 AM
Subject: [geo] Natural olivine beaches
HiThe proposal for olivine weathering on beaches seems to pass a common sense test.However, there's been a lack of detailed discussion about the occurrence and function of natural olivine beaches, as far as I'm aware.There are a lot of beaches in the world. Olivine is pretty common. How much of a sink is natural beach chemical and mechanical weathering of olivine?It should be easy to find at least one location where there's massive quantities of olivine sand, and take detailed measurements on the carbon sink.I know there's at least one such beach in the literature, but I can't recall discussions of others, nor detailed quantitative research on erosion and sequestration rates at this siteCan someone enlighten me as to why this has seemingly been overlooked for detailed study?A--
You received this message because you are subscribed to the Google Groups "geoengineering" group.
To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/geoengineering.
For more options, visit https://groups.google.com/d/optout.
You received this message because you are subscribed to the Google Groups "geoengineering" group.
To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/geoengineering.
For more options, visit https://groups.google.com/d/optout.
You received this message because you are subscribed to the Google Groups "geoengineering" group.
To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/geoengineering.
For more options, visit https://groups.google.com/d/optout.
