Peridotite as a possible means of carbon sequestration

What is peridotite and why is it important? You might hear a lot more about peridotite in the future. Peridotite is a substance that is contained in the earth’s mantle, deep underground. It is made up of mainly silica; some types have iron, olivine and pyroxene and is derived from the earth’s mantle. There is lots of the stuff and, it seems, that when carbon dioxide is pushed into peridotite underground, the carbon dioxide reacts to form a solid carbonate rock, like marble and limestone, sequestrating the gas into hard solid rock. Continue reading