Diffuse CO_2 degassing from summit areas on Mt. Hood, Oregon, USA

摘要

Results from a survey of diffuse CO_2 flux in the Devils Kitchen area near the summit of Mt. Hood in northern Oregon show that intense hydrothermal alteration impedes diffuse gas flux and CO_2 is emitted predominately from small gas vents and microfractures. Results indicate that at Devils Kitchen 0.78-0.94 of a tonne of CO_2 per day is emitted from a ≈5000 m~2 area. This suggests that a total of 6-7 tonnes of CO_2 per day could be emitted from the ≈37,000m~2 of mostly inaccessible thermal ground around the crater.