Fieldwork in Arizona

As Part of my PhD I am investigating how, how fast and how much CO2 may leak from a CO2 reservoir to the surface through faults. Faults are areas within the earth’s crust where layers of rock have been displaced to each other and often form pathways for fluids (water, oil, gas, CO2). I have tried to explain how faults form and their role in my research in this post.

In eastern Arizona, between the towns of St. Johns and Springerville, there is a natural CO2 reservoir in the subsurface. It has been leaking CO2 from the reservoir to the surface in the past – and this leakage is indicated by a certain type of carbonate rock at the surface: Travertine. It forms when CO2 rich fluids reach the surface and can thus be used to track ancient leakage points. This can…

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