A tabulation of meteorological variables and concentrations of helium, carbon dioxide, oxygen, and nitrogen in soil gases collected regularly from four sites at the Roosevelt Hot Springs Known Geothermal Resources Area, Utah

Tabulation of N₂, O₂, CO₂, and He concentrations in soil gases collected on a regular basis for 11 months from a site at Tucson, Arizona

“…Measurements of concentrations of N2 , O2 , CO2 , and He in soil gases and meteorological parameters have been monitored on a long-term basis at several sites in both dry and humid environments (Klusman and Jaacks, 1987;Hinkle, 1988Hinkle, , 1990aHinkle, , 1990bHinkle and Ryder, 1988;Hinkle and Dennen, 1989) . The purpose of these studies has been to better understand the effects of environmental conditions on concentrations of soil gas components that are often used for geochemical exploration for mineral and geothermal resources.…”

“…High soil moisture tends to either flush gases from the soil pores or to dissolve the gases; the effect in both cases is decreased concentration of gases in the soil. Increased concentrations of soil-gas CO2 generally occur with increased soil temperatures, whereas He concentrations generally decline as soil temperatures increase (Hinkle andRyder, 1987, 1988;Reimer, 1979Reimer, , 1980. This study was part of a series of soil-gas monitoring studies carried out in different environments to assess the effects of meteorology changes on soil-gas concentrations.…”

Tabulation of N₂, O₂, CO₂, and He concentrations in soil gases collected regularly for 13 months at a site on the summit of Kilauea Volcano

“…High moisture content tends to either flush gases from the soil pores or to dissolve the gases; the effect in both cases is decreased concentration of gases in the soil. Increased concentrations of soil-gas CO2 generally occur with increased soil temperatures in summer, whereas higher soil temperatures generally coincide with decreased concentrations of He (Hinkle andRyder, 1987, 1988;Reimer, 1979Reimer, , 1980. The summit area of Kilauea Volcano was chosen as the site for a long-term monitoring study in a humid environment.…”

“…Measurement of concentrations of N2, O2, CO2, and He in soil gases and meteorological parameters has been monitored on a long-term basis at several sites within the United States (Klusman and Jaacks, 1987;Hinkle, 1988;Hinkle and Ryder, 1988;Hinkle and Dennen, 1989). The purpose of these studies has been to better understand the effects of environmental conditions on concentrations of soil gas components that are often used for geochemical exploration for mineral and geothermal resources.…”