Hydrocarbon seeps result from the migration of hydrocarbon-rich fluids and gases upward from the subsurface. The various methods of identification, sampling, and analysis of these seeps provide insights into subsurface carbon systems related to a myriad of processes from biogenic breakdown of organic-rich matter, to formation and destabilization of gas hydrate layers, to deeper petroleum systems formed through thermogenic processes. In turn this understanding allows researchers who study hydrocarbon migration and shallow near-surface and surface seepage of this material to understand the natural environmental baseline conditions of a system and potential drivers for changes to those conditions if they are...

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