Document Type

Dataset

Publication Title

Geochemistry, Geophysics, Geosystems

Publication Date

2019

Abstract

Data Description:

Data for stream samples taken in 2012 from the Gibbon River near Norris Geyser Basin are included in an excel file. Data are associated with an article submitted to Geochemistry, Geophysics, Geosystems in 2019. Collection methods and interpretation are detailed in the article. Data collected include water physical and water quality parameters, dissolved Radon, dissolved noble gas isotopes, dissolved chloride and discharge. The excel worksheet has 5 worksheets. In each worksheet the datatype is given in the top row and the units in the row just below. The Sample Summary worksheet included a directory of the sample ids and locations, the types of measurements taken and the water quality physical parameters: T, DO, pH, Total Dissolved Gas Pressure (TDG) and Specific Conductivity (SC). The 222Rn worksheet shows the dissolved radon concentration. The Noble Gases sheet has the concentration of dissolved noble gases including helium. The Cl worksheet contains dissolved chloride concentrations. The Discharge worksheet includes discharge and cross section geometry measurements.

Article abstract:

We show that synoptic sampling of streams can be used to characterize volcanic volatiles in groundwater over large spatial scales. Synoptic sampling of dissolved noble gases, 222Rn, major ions and stream discharge was carried out along a 30 km of the Gibbon River, near Norris Geyser Basin in Yellowstone National Park, USA. Groundwater discharge location, volume and composition was estimated by constrained calibration of a stream flow and solute transport model. Estimated groundwater composition from stream modeling was compared to shallow groundwater concentrations measured in nearby springs. 3He, 222Rn and Cl-aq results from Gibbon River samples are indicative of groundwater discharge with a volcanic signature along the study reach. Stream water noble gas isotopic composition have similar isotopic mixing pattern to springs from shallow cool and hydrothermal systems in the area. The model estimated composition of groundwater discharging to the Gibbon agrees well with observed groundwater composition from nearby springs for all modeled analytes. We present the first observations of elevated mantle helium in stream water, and show that stream-water can be used as a convenient collection point to estimate spatially distributed groundwater composition and to monitor changes in volatile flux over large spatial areas. Stream surveys in volcanic terrain can be a powerful new method for volcanic monitoring at the catchment scale and beyond.

Comments

The article associated with this data is under review. (September 2019)

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