Thermal Infrared Remote Sensing of Geothermal Systems

In areas of anomalously high crustal heat flow, geothermal systems transfer heat to the Earth’s surface often forming surface expressions such as hot springs, fumaroles, heated ground, and associated mineral deposits. Geothermal systems are increasingly important as sources of renewable energy, or as natural wonders of protected status attracting tourists, and their study is relevant to monitoring deeper magmatic processes. Thermal infrared (TIR) remote sensing provides a unique tool for mapping the surface expressions of geothermal activity as applied to the exploration for new geothermal power resources and long term monitoring studies. In this chapter, we present a review of TIR remote sensing for investigations of geothermal systems. This includes a discussion on the applications of TIR remote sensing to the mapping of surface temperature anomalies associated with geothermal activity, measurements of near-surface heat fluxes associated with these features as input into monitoring and resource assessment, and the mapping of surface mineral indicators of both active and recently active hydrothermal systems.

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