A Model of the Magmatic-hydrothermal System at Yellowstone National Park, U.S.A. PDF Download
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Author: Robert Orville Fournier
Publisher:
ISBN:
Category : Geothermal resources
Languages : en
Pages : 1
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Book Description
Author: Robert Orville Fournier
Publisher:
ISBN:
Category : Geothermal resources
Languages : en
Pages : 1
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Book Description
Author: Lisa A. Morgan
Publisher: Geological Society of America
ISBN: 0813724597
Category : Science
Languages : en
Pages : 104
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Book Description
"Home to more than 10,000 thermal features, Yellowstone has experienced over 20 large hydrothermal explosions producing craters from 100 to over 2500 meters in diameter during the past 16,000 years. Using new mapping, sampling, and analysis techniques, this volume documents a broad spectrum of ages and geologic settings for these events and considers additional processes and alternative triggering mechanisms that have not been explored in previous studies. Although large hydrothermal explosions are rare on the human time scale, the potential for future explosions in Yellowstone is not insignificant, and events large enough to create a 100-m-wide crater might be expected every 200 years. This work presents information useful for determining the timing, distribution, and possible causes of these events in Yellowstone, which will aid in the planning of monitoring strategies and the anticipation of hydrothermal explosions."--Publisher's description.
Author: Robert L. Christiansen
Publisher:
ISBN:
Category : Electronic government information
Languages : en
Pages : 160
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Book Description
Author: Lisa A. Morgan
Publisher: Government Printing Office
ISBN: 9781411342040
Category : Calderas
Languages : en
Pages : 116
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Book Description
Author: Kira A. Dickey
Publisher:
ISBN:
Category : Electromagnetism
Languages : en
Pages :
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Book Description
Yellowstone National Park hosts over 10,000 thermal features (e.g. geysers, fumaroles, mud pots, and hot springs), yet little is known about the hydrothermally active zones hundreds of meters beneath the features. Transient electromagnetic (TEM) soundings and 2D direct current (DC) resistivity profiles show that hydrothermal alteration at active sites have a higher electrical conductivity than the surrounding hydrothermally inactive areas. For that reason, airborne TEM is an effective method to characterize large areas and identify hydrothermally active and inactive zones using electrical conductivity. Here we present results from an airborne TEM survey acquired jointly by the U.S. Geological Survey and the University of Wyoming in November, 2016. We integrate resistivity from the airborne electromagnetic (EM) survey with research drillhole data and rock physics models to investigate the controls on electrical conductivity in the upper few hundreds of meters of the Yellowstone hydrothermal system. Resistivities in Yellowstone are the product of complex variations of lithology, temperature, salinity, clay content, and hydrothermal fluids. Results show that the main drivers in lowering the high resistivitiy of volcanic rocks are water saturation and hydrothermal alteration. Salinities are not significantly elevated in Yellowstone and temperature is not a first order affect.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 258
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Book Description
Author: Robert Orville Fournier
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 60
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Book Description
Author: Christie D. Cino
Publisher:
ISBN:
Category : Geochemistry
Languages : en
Pages : 51
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Book Description
Yellowstone National Park is a dynamic environment home to an array of geysers, hot springs, and hydrothermal vents fueled by the underlying continental magmatic intrusion. Yellowstone Lake vent fluids accounts for approximately 10% of the total geothermal flux for all of Yellowstone National Park. Though studying this remote hydrothermal system poses severe challenges, it provides an excellent natural laboratory to research hydrothermal fluids that undergo higher pressure and temperature conditions in an environment largely shielded from atmospheric oxygen. The location of these vents also provides chemistry that is characteristic of fluids deeper in the Yellowstone hydrothermal system. In August 2016 and 2017, hydrothermal fluids were collected from the Stevenson Island vents in collaboration with the Hydrothermal Dynamics of Yellowstone Lake (HD-YLAKE) project using novel sampling techniques and monitoring instrumentation. The newly built ROV Yogi was deployed to reach the vents in-situ with temperatures in excess of 151oC at 100-120 m depth, equipped with a 12-cylinder isobaric sampler to collect the hydrothermal fluids. Analyses of the Yellowstone Lake hydrothermal fluid revealed chemistry almost identical to that of the lake water, with the exception of an abundance of dissolved gases, such as CO2 and H2S. Dissolved H2 and CO are also present, suggesting more reducing conditions at elevated temperatures with high fractions of hydrothermal source fluid. Reducing conditions are also indicated by high H2S/SO4 ratio, and in-situ chemical sensor data. A particularly abnormal feat of these fluids is the dissolved silica concentrations, which are well below saturation with respect to quartz and amorphous silica, in spite of the silica-rich substrate which the hydrothermal fluids vent through. One explanation for this chemical data is influx of high enthalpy steam from a boiling zone immediately beneath the lake floor. Mass-balance calculations indicate the collected sample contain 27% vapor to mix with lake water in order to achieve the observed temperatures of the vent fluids. However, this interpretation is a paradigm shift from the previous models, which entail mixing of a chloride rich, isotopically heavy deep thermal reservoir liquid with lake water.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 426
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Book Description
Author: Chi-yuen Wang
Publisher: Springer
ISBN: 3642008100
Category : Science
Languages : en
Pages : 228
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Book Description
Based on the graduate course in Earthquake Hydrology at Berkeley University, this text introduces the basic materials, provides a comprehensive overview of the field to interested readers and beginning researchers, and acts as a convenient reference point.
