Bill Evans, PhD (Former Employee)
Science and Products
Filter Total Items: 110
Natural hazards associated with Lake Kivu and adjoining areas of the Birunga volcanic field, Rwanda and Zaire, Central Africa; final report Natural hazards associated with Lake Kivu and adjoining areas of the Birunga volcanic field, Rwanda and Zaire, Central Africa; final report
No abstract available.
Authors
M. L. Tuttle, John P. Lockwood, William C. Evans
Origins of water and solutes in and north of the Norris-Mammoth Corridor, Yellowstone National Park Origins of water and solutes in and north of the Norris-Mammoth Corridor, Yellowstone National Park
This study was initiated to investigate the impacts of geothermal development in the Corwin Springs Known Geothermal Resources Area (KGRA) on the hydrothermal features of Yellowstone National Park. To determine possible hydrogeochemical connections, we used the diagnostic stable and radioactive isotopes of several elements, and the chemical and gas compositions of thermal and cold waters...
Authors
Yousif Kharaka, Robert Mariner, Gil Ambats, William Evans, Lloyd White, Thomas Bullen, B. Mack Kennedy
Discharge rates of fluid and heat by thermal springs of the Cascade Range, Washington, Oregon, and northern California Discharge rates of fluid and heat by thermal springs of the Cascade Range, Washington, Oregon, and northern California
Fluid and heat discharge rates of thermal springs of the Cascade Range have been determined using the chloride inventory method. Discharge rates of thermal spring groups range from 1 to 120 L s−1. Most of the fluid (50%) and heat (61%) are discharged from two hot spring groups in northern Oregon. Total discharge from thermal springs in the Cascade Range of California, Oregon, and...
Authors
Robert H. Mariner, T. S. Presser, William C. Evans, M.K.W. Pringle
The evolution of thermal structure and water chemistry in Lake Nyos The evolution of thermal structure and water chemistry in Lake Nyos
We collected a time series of physical and chemical data to gain a better understanding of the dynamics of Lake Nyos. Measurements of water and gas chemistry, and temperature made during January, March, and May 1987 are compared to data taken in September 1986 just after the initial CO2 gas release. There is no pattern of change in overall heat content of the lake, although heat input to...
Authors
G.W. Kling, M. L. Tuttle, William C. Evans
Geochemistry of thermal water from selected wells, Boise, Idaho Geochemistry of thermal water from selected wells, Boise, Idaho
Samples of thermal water from selected wells in the Boise area were analyzed for chemical composition; stable isotopes of hydrogen, oxygen, and dissolved carbon; radioactive carbon; and dissolved-gas concentrations. Chemically, the waters are virtually identical to those of the adjacent Idaho batholith. Isotopically, the thermal waters are more depleted in deuterium and oxygen-18 than...
Authors
Robert H. Mariner, H.W. Young, D. J. Parliman, William C. Evans
The role of mantle CO2 in volcanism The role of mantle CO2 in volcanism
Carbon dioxide is the propellant gas in volcanic eruptions and is also found in mantle xenoliths. It is speculated that CO2 occurs as a free gas phase in the mantle because there is no reason to expect CO2 to be so universally associated with volcanic rocks unless the CO2 comes from the same source as the volcanic rocks and their xenoliths. If correct, the presence of a free gas in the...
Authors
I. Barnes, William C. Evans, L. D. White
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 110
Natural hazards associated with Lake Kivu and adjoining areas of the Birunga volcanic field, Rwanda and Zaire, Central Africa; final report Natural hazards associated with Lake Kivu and adjoining areas of the Birunga volcanic field, Rwanda and Zaire, Central Africa; final report
No abstract available.
Authors
M. L. Tuttle, John P. Lockwood, William C. Evans
Origins of water and solutes in and north of the Norris-Mammoth Corridor, Yellowstone National Park Origins of water and solutes in and north of the Norris-Mammoth Corridor, Yellowstone National Park
This study was initiated to investigate the impacts of geothermal development in the Corwin Springs Known Geothermal Resources Area (KGRA) on the hydrothermal features of Yellowstone National Park. To determine possible hydrogeochemical connections, we used the diagnostic stable and radioactive isotopes of several elements, and the chemical and gas compositions of thermal and cold waters...
Authors
Yousif Kharaka, Robert Mariner, Gil Ambats, William Evans, Lloyd White, Thomas Bullen, B. Mack Kennedy
Discharge rates of fluid and heat by thermal springs of the Cascade Range, Washington, Oregon, and northern California Discharge rates of fluid and heat by thermal springs of the Cascade Range, Washington, Oregon, and northern California
Fluid and heat discharge rates of thermal springs of the Cascade Range have been determined using the chloride inventory method. Discharge rates of thermal spring groups range from 1 to 120 L s−1. Most of the fluid (50%) and heat (61%) are discharged from two hot spring groups in northern Oregon. Total discharge from thermal springs in the Cascade Range of California, Oregon, and...
Authors
Robert H. Mariner, T. S. Presser, William C. Evans, M.K.W. Pringle
The evolution of thermal structure and water chemistry in Lake Nyos The evolution of thermal structure and water chemistry in Lake Nyos
We collected a time series of physical and chemical data to gain a better understanding of the dynamics of Lake Nyos. Measurements of water and gas chemistry, and temperature made during January, March, and May 1987 are compared to data taken in September 1986 just after the initial CO2 gas release. There is no pattern of change in overall heat content of the lake, although heat input to...
Authors
G.W. Kling, M. L. Tuttle, William C. Evans
Geochemistry of thermal water from selected wells, Boise, Idaho Geochemistry of thermal water from selected wells, Boise, Idaho
Samples of thermal water from selected wells in the Boise area were analyzed for chemical composition; stable isotopes of hydrogen, oxygen, and dissolved carbon; radioactive carbon; and dissolved-gas concentrations. Chemically, the waters are virtually identical to those of the adjacent Idaho batholith. Isotopically, the thermal waters are more depleted in deuterium and oxygen-18 than...
Authors
Robert H. Mariner, H.W. Young, D. J. Parliman, William C. Evans
The role of mantle CO2 in volcanism The role of mantle CO2 in volcanism
Carbon dioxide is the propellant gas in volcanic eruptions and is also found in mantle xenoliths. It is speculated that CO2 occurs as a free gas phase in the mantle because there is no reason to expect CO2 to be so universally associated with volcanic rocks unless the CO2 comes from the same source as the volcanic rocks and their xenoliths. If correct, the presence of a free gas in the...
Authors
I. Barnes, William C. Evans, L. D. White
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.