Degassing, a fundamental process in planetary evolution

One of the main phenomena of the internal dynamism of the inner planets, satellites and asteroids is the degassing processes.
This implies that in these bodies there is a gradual rise of certain relatively light elements or compounds, which assume a gaseous state in subsurface and surface pressure and temperature ranges.
The main molecules that are part of the gaseous envelopes of the planets are nitrogen, methane, carbon dioxide and water. Nitrogen is relatively abundant and therefore, when the planetary interior is contracted and warmed, it tends to ooze outward forming "nitrogen atmospheres" (when the planet's gravity is sufficient to retain them). Due to its chemically stable character, it does not combine mostly in its ascent or in its stay in the atmosphere.
Carbon and its hydrogenated compounds, on the other hand, tend to have a much more active chemical behavior, particularly in the presence of some oxygenated minerals, such as metal oxides and sulfates. The fractures produced in the planetary interior by compression, relaxation and heating as well as astronomical tides, facilitate the ascent.
When combined with oxygen, methane: CH4 (which is the most common molecule in planetary interiors) generates CO2, CO and H2O, depending on the availability of oxygen. The carbonaceous fluids thus formed are injected into the solid masses generating lateral pressures in the fractures, widening and lubricating them. In this way the movement of the rocky blocks is possible, with the production of earthquakes and gas ejections.
It is considered that most of the Earth's atmospheric and oceanic carbon has been immobilized in the form of carbonates.
This composition can be logically explained through the theories of planetary degassing, the mineral origin of oil and gas and the occurrence of oxidation processes in the subsurface layers.
Some authors (Thomas Gold, 1992 and 1999) attribute the occurrence of this process to the metabolism of underground hyperthermobacterial populations. When the methane in its ascent reaches 5-10 kilometers deep with temperatures below 150 degrees Celsius it encounters a numerous underground flora of bacteria. These bacteria are called hyperthermobacteria belonging to the Archea Domain. These bacteria base their metabolism on the oxidation of methane, producing H2O and CO2 from oxides, sulfates and other salts. In this way, reduced oxides (eg magnetite), sulfides (pyrite, chalcopyrite, etc.) and other parts of methane survive and emerge on the ocean floor and continents oxidizing in the atmosphere (forming CO2). The oxidation of a large amount of CH4 results in the formation of water that is also incorporated into the atmosphere. This "biochemical" water is added to the waters provided by ometas, asteroids and meteorites.
The emergence of this set of deep waters (or "juveniles") drags diverse salts and accumulates on the surface forming oceans and other aquatic bodies. Methane has upwelling at all sites where there are ducts (fractures) that relieve pressure and allow its ascent. On the seabed, where the crust is thinner, there are innumerable sources of methane and by-products (water vapor, carbon dioxide). In the presence of cold waters, methane mixes with these, resulting in the formation of methane hydrates, which in some ocean bottoms can have thicknesses of several tens of meters.