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A Novel Use of NMR Measurements for In-Situ Monitoring of Geochemical Reactions

The Problem

Many natural and controlled processes in the near-surface region of Earth, involve geochemical reactions that lead to changes in the mineralogic form of iron. Measurements made to study, and/or monitor such reactions typically require methods of direct sampling that can perturb or disrupt the region of interest.

Our Approach

NMR measurements can be made remotely using a surface-based NMR system, or in a borehole using NMR logging. It is well known that the presence of iron affects NMR relaxation times. We are exploring the use of NMR measurements as a way to determine the mineralogic form of the iron, and thus monitor geochemical reactions that result in changes in iron mineralogy.

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