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in publisher: "University of Utah. Energy & Geoscience Institute."  
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Tracing Geothermal Fluids

Description: Geothermal water must be injected back into the reservoir after it has been used for power production. Injection is critical in maximizing the power production and lifetime of the reservoir. To use injectate effectively the direction and velocity of the injected water must be known or inferred. This information can be obtained by using chemical tracers to track the subsurface flow paths of the injected fluid. Tracers are chemical compounds that are added to the water as it is injected back into… more
Date: March 1, 2004
Creator: Adams, Michael C. & Nash, Greg
Partner: UNT Libraries Government Documents Department
open access

Structural controls, alteration, permeability and thermal regime of Dixie Valley from new-generation MT/galvanic array profiling

Description: State-of-the-art MT array measurements in contiguous bipole deployments across the Dixie Valley thermal area have been integrated with regional MT transect data and other evidence to address several basic geothermal goals. These include 1), resolve a fundamental structural ambiguity at the Dixie Valley thermal area (single rangefront fault versus shallower, stepped pediment; 2), delineate fault zones which have experienced fluid flux as indicated by low resistivity; 3), infer ultimate heat and … more
Date: November 30, 2007
Creator: Wannamaker, Philip E.
Partner: UNT Libraries Government Documents Department
open access

Imaging Multi-Dimensional Electrical Resistivity Structure as a Tool in Developing Enhanced Geothermal Systems (EGS)

Description: The overall goal of this project has been to develop desktop capability for 3-D EM inversion as a complement or alternative to existing massively parallel platforms. We have been fortunate in having a uniquely productive cooperative relationship with Kyushu University (Y. Sasaki, P.I.) who supplied a base-level 3-D inversion source code for MT data over a half-space based on staggered grid finite differences. Storage efficiency was greatly increased in this algorithm by implementing a symmetric… more
Date: December 31, 2007
Creator: Wannamaker, Philip E.
Partner: UNT Libraries Government Documents Department
open access

Tectonic Versus Volcanic Origin of the Summit Depression at Medicine Lake Volcano, California

Description: Medicine Lake Volcano is a Quaternary shield volcano located in a tectonically complex and active zone at the transition between the Basin and Range Province and the Cascade Range of the Pacific Province. The volcano is topped by a 7x12 km elliptical depression surrounded by a discontinuous constructional ring of basaltic to rhyolitic lava flows. This thesis explores the possibility that the depression may have formed due to regional extension (rift basin) or dextral shear (pull-apart basin) ra… more
Date: May 1, 2010
Creator: Gwynn, Mark Leon
Partner: UNT Libraries Government Documents Department
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