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Large-scale hydrothermal fluid discharges in the Norris-Mammoth corridor, Yellowstone National Park, USA

By: , , and 
https://doi.org/10.1016/S0375-6742(00)00025-X

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Abstract

Norris–Mammoth corridor is a complex subsidence structure that extends ∼40 km northward from the 0.6 Ma Yellowstone caldera, and contains many hydrothermal features with high fluid discharges totaling ∼1000 l/s. About 150–250 l/s of hydrothermal water, which attains boiling temperature at surface and 360°C at depth, discharge from the Norris Geyser Basin, adjacent to the caldera. The highest thermal water and gas discharges in the corridor are from Mammoth Hot Springs, where 500–600 l/s thermal water with surface temperatures of up to 73°C and calculated subsurface temperatures of ∼100°C issue from ∼100 hot springs scattered over a score of step-like travertine terraces that range in age from ∼0.4 Ma to recent. All the thermal water is meteoric, likely recharged in the Gallatin Range at 2.5–3.0 km elevations. The isotopic and chemical compositions of thermal waters and solutes can be interpreted to indicate a common magmatic source for heat and volatile solutes located near Norris. However, the chemical and isotopic compositions of gases, especially the 3He/4He ratios, provide strong evidence for a separate magmatic source for the Mammoth system.
Publication type Book
Publication Subtype Conference publication
Title Large-scale hydrothermal fluid discharges in the Norris-Mammoth corridor, Yellowstone National Park, USA
DOI 10.1016/S0375-6742(00)00025-X
Volume 69-70
Year Published 2000
Language English
Publisher Elsevier Science Publishers B.V.
Publisher location Amsterdam, Netherlands
Larger Work Title Journal of Geochemical Exploration
First page 201
Last page 205
Conference Title Geofluids III - 3rd International Conference on Fluid Evolution, Migration and Interaction in Sedimentary Basins and Orogenic Belts
Conference Location Barcelona, Spain
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