Zobrazeno 1 - 10
of 606
pro vyhledávání: '"D. Bergfeld"'
Autor:
S. Hurwitz, R. B. McCleskey, D. Bergfeld, S. E. Peek, D. D. Susong, D. A. Roth, J. D. G. Hungerford, E. B. White, L. N. Harrison, B. Hosseini, R. G. Vaughan, A. G. Hunt, J. B. Paces
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 21, Iss 7, Pp n/a-n/a (2020)
Abstract In the past two decades, the U.S. Geological Survey and the National Park Service have studied hydrothermal activity across the Yellowstone Plateau Volcanic Field (YPVF) to improve the understanding of the magmatic‐hydrothermal system and
Externí odkaz:
https://doaj.org/article/177dd97e2bbf4a55b2902ad107f3eced
Autor:
Stephen B. Gingerich, Martha A. Scholl, Edward F. Younger, Steven E. Ingebritsen, R. Lopaka Lee, Shaul Hurwitz, Sara Peek, D. Bergfeld, James P. Kauahikaua, William C. Evans, Paul A. Hsieh
Publikováno v:
Professional Paper.
Autor:
D. Bergfeld, S.A. Archfield, Laura E. Clor, Peter J. Kelly, Kurt R. Spicer, A. C. Newman, I. M. Crankshaw, Steven E. Ingebritsen, William C. Evans
Publikováno v:
Journal of Volcanology and Geothermal Research. 356:24-35
From 2009 to 2015 the U.S. Geological Survey (USGS) systematically monitored hydrothermal behavior at selected Cascade Range volcanoes in order to define baseline hydrothermal and geochemical conditions. Gas and water data were collected regularly at
Publikováno v:
Journal of Volcanology and Geothermal Research. 347:312-326
We quantified gas and heat emissions in an acid-sulfate, vapor-dominated area (0.04-km2) of Norris Geyser Basin, located just north of the 0.63 Ma Yellowstone Caldera and near an area of anomalous uplift. From 14 May to 3 October 2016, an eddy covari
Publikováno v:
Journal of Volcanology and Geothermal Research. 343:109-121
Results from chemical and isotopic analyses of water and gas collected between 2002 and 2016 from sites on and around Mount St. Helens are used to assess magmatic degassing related to the 2004–2008 eruption. During 2005 the chemistry of hot springs
Autor:
K.P.J. Hoffmann, Sebastian Cotofana, D. Bergfeld, P. Snozzi, G. Sattler, Klaus Fritz, Boris Sommer, Uwe Wollina, Carmen Salavastru, Wolfgang G. Philipp-Dormston
Publikováno v:
Journal of the European Academy of Dermatology and Venereology. 31:1088-1095
Facial fillers play an important role in the correction of facial changes associated with ageing. They offer quick treatments in the outpatient setting with minimal subsequent downtime that provide predictable, natural-looking, long-lasting results.
Autor:
D. Bergfeld, William C. Evans
Publikováno v:
Scientific Investigations Report. :1-31
Publikováno v:
American Mineralogist. 101:343-354
The active Lassen hydrothermal system includes a central vapor-dominated zone or zones beneath the Lassen highlands underlain by ~240 °C high-chloride waters that discharge at lower elevations. It is the best-exposed and largest hydrothermal system
Publikováno v:
Journal of Volcanology and Geothermal Research. 396:106853
We report here on the first focused study of gas discharges and thermal spring waters at Okmok volcano since the 2008 phreatomagmatic eruptions. Results include the first compositional gas data from Okmok with minimal air contamination and the first
Publikováno v:
Fact Sheet.