Variations in hydrate existence conditions due to sediment and mud redeposition. Due to earthquakes, volcanic eruptions or other processes, part of the sediments can be released from a sloping sea bottom and transported and redeposited in other places, thereby changing pressure conditions at the top of a hydrate layer.
Variations in hydrate existence conditions due to glacial-interglacial conditions. Removal of ice cover not only decreases overlying pressure, but also allows water temperatures overlying the sediments to increase.
Variations in hydrates due to sea-level rise and fall.
Enrichment of ethane in hydrates as a consequence of varying neotectonic conditions.
KeywordsBurning Permeability Methane Migration Dioxide
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