Master of Science, The Ohio State University, 2016, Environmental Science
In this project I worked with a team of analysts, and together we sought to develop new ways to analyze geologic, geochemical, and geophysical data that would increase the prospects of geothermal exploration and development. We collected, organized, and analyzed data sets from southwest New Mexico in the context of an integrated framework that combines the data sets for various signatures of a geothermal resource into a cohesive analysis of the presence of heat, fluid, and permeability. We incorporated data sets on structural characteristics (earthquakes, geophysical logs, fault location and age, basement depth), surface topography, water table elevation, conservative ion concentrations, and thermal information (heat flow, bottom hole temperature, discharge temperature, and basement heat generation). These data sets were combined to create maps that indicate structural analysis, slope, geothermometry, and heat. We also mapped discharge areas (to constrain elevations where groundwater may be discharged through modern thermal springs or paleo-thermal springs) and subcrops: possible erosionally- or structurally-controlled breaches in regional-scale aquitards that form the basis of our hydrogeologic windows concept. These two maps were particularly useful in identifying known geothermal systems and narrowing the search for unknown geothermal prospects. I further refined the “prospectivity” of the areas within the subcrops and discharge areas by developing and applying a new method for spatial association analysis to data on known and inferred faults, earthquakes, geochemical thermometers, and heat flow. This spatial association analysis method determines the relationships of the location and magnitudes of observations of these data with known geothermal sites. The results of each of the six spatial association analyses were weighted between 0 and 1 and summed to produce a prospectivity score between 0 and a theoretical maximum of 9, with 9 indicating highest geothermal (open full item for complete abstract)
Committee: Jeffrey Bielicki Prof. (Advisor); Gajan Sivandran Prof. (Committee Member); Desheng Liu Prof. (Committee Member)
Subjects: Environmental Science