Once you do the mining and crushing, you might recover chromite, even if the grade is too low as a chromite ore. Once the mining and crushing is already paid for by the olivine, it may become possible to recover low chromite contents from the crushed olivine. Another possibility is magnesite that is present as veins in some olivine massifs. Olaf Schuiling
From: geoengineering@googlegroups.com [mailto:geoengineering@googlegroups.com] On Behalf Of Andrew Lockley Sent: zondag 5 oktober 2014 10:56 To: Russell Seitz Cc: geoengineering Subject: Re: [geo] Re: Natural olivine beaches Do any useful materials tend to occur alongside olivine? If so, using tax incentives to ensure that open cast mining takes place in olivine-rich areas would potentially help greatly. Coarse-ground mine tailings dumped in areas prone to erosion would eventually end up weathering pretty fast. This could be a very simple way of getting some pretty large volumes of CO2 out of the air. A On 5 Oct 2014 09:03, "Russell Seitz" <russellse...@gmail.com<mailto:russellse...@gmail.com>> wrote: Perhaps more to the point,temperate zone serpentinization and tropical weathering of olivine rich rocks like basalts and dunites is proceeding constantly over large inland areas, and whereever such rocks are eroded , comminution in rivers and streams gives rise to olivine particles even smaller than those you have discussed . On Tuesday, September 30, 2014 2:28:29 PM UTC-4, andrewjlockley wrote: Hi The 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 site Can 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 geoengineering+unsubscr...@googlegroups.com<mailto:geoengineering+unsubscr...@googlegroups.com>. To post to this group, send email to geoengineering@googlegroups.com<mailto:geoengineering@googlegroups.com>. 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 geoengineering+unsubscr...@googlegroups.com<mailto:geoengineering+unsubscr...@googlegroups.com>. To post to this group, send email to geoengineering@googlegroups.com<mailto:geoengineering@googlegroups.com>. 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 geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
