Here's an interesting talk about some of the reactions that are hypothesized to occur (albeit here in an extraterrestrial context). The speaker indicates that t

Here's an interesting talk about some of the reactions that are hypothesized to occur (albeit here in an extraterrestrial context). The speaker indicates that temperatures would need to be around 300C for these reactions to occur at an appreciable rate. Maybe that is found, deep enough in the Earth? https://www.youtube.com/watch?v=df8L0khbrts https://www.youtube.com/watch?v=df8L0khbrts