Previously unknown sink for methane discovered deep in granitic rock

Scientists have explored a previously unknown sink for the greenhouse gas methane at great depth in fractured granitic rock. The methane in the granite is consumed through microbe-mediated anaerobic oxidation, a process dominantly described from marine seabeds where it significantly mitigates the escape of methane to the atmosphere. However, the methane oxidation deep in the granite shows several intriguing differences compared to marine seabeds.


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