Can You Give Me A Very Good Thesis Topic About Geochemistry?

What field of geochemistry do you specialize in?

I have recently read an article about methane gas beneath the ice in Siberia. Huge amounts of methane gas is trapped under the ice, where is it coming from? Where will it go?. The article suggested it was rotting vegetation producing the gas and because of the ice it just stays there. It showed pictures of holes being drilled in the ice and the gas was ignited to dramatic effect, flames shooting 50' in the air. Surely this must be harnessed, before global warming takes over and releases all that methane into the atmosphere.

It has been argued that methane is a product of the outgassing of the original earth material. It has been further argued that the flow of methane from the deep earth supports a biomass greater than that on the surface. Evidence is offered by the presence of hydrocarbons in deep wells drilled in granite. A thesis could explore any of these assertions, and or the operational mechanisms that are involved.