Exploration of the Hot Springs Bay Valley (HSBV) geothermal resource area, Akutan, Alaska

•Five years of exploration has revealed a viable geothermal resource.•Fluid and gas chemistry indicates a 240–300°C reservoir with ∼180°C outflow.•Near-surface permeability is focused at intersections of overlapping structures.•The clay cap is moderately developed, with chlorite abundant throughout...

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