Geophysical Characterization of a Subsurface Igneous Formation in Medina County, Texas

dc.contributor.advisorWeissling, Blake
dc.contributor.advisorGodet, Alexis
dc.contributor.authorQuante, Nicolas
dc.contributor.committeeMemberXie, Hongjie
dc.date.accessioned2024-02-12T19:51:53Z
dc.date.available2024-02-12T19:51:53Z
dc.date.issued2017
dc.descriptionThis item is available only to currently enrolled UTSA students, faculty or staff. To download, navigate to Log In in the top right-hand corner of this screen, then select Log in with my UTSA ID.
dc.description.abstractProlific volcanism during the Late Cretaceous resulted in the emplacement of hundreds of igneous masses predominately within or atop the Austin Chalk in Central Texas. Often referred to as "serpentine plugs," the features are recognized to be submarine volcanic mounds trending northeast to southwest roughly parallel to the Balcones and Lulling fault systems. In 2015 a driller attempted to install a well in the Edwards aquifer on a property in Medina County, Texas. The driller encountered what was described as a hard igneous lithology at approximately 91 m (300 ft) below surface. Initial attempts at drilling the well were unsuccessful due to the unexpectedly hard lithology. In addition, problems with wellbore deviation occurred. The driller suspected interaction with a fault plane was to blame for the deviation problems. After multiple dry holes the driller relocated by chance to an area that was absent of any subsurface igneous lithology. The purpose of this project is to accurately determine the location, extent, and morphology of the suspected volcanic formation by utilization of complementary geophysical investigation techniques. It is hypothesized that the additional constraints and a high density of geophysical observation points will provide a more accurate and complete subsurface model of the igneous body than previously available data in the study area.
dc.description.departmentGeosciences
dc.format.extent78 pages
dc.format.mimetypeapplication/pdf
dc.identifier.isbn9781369777031
dc.identifier.urihttps://hdl.handle.net/20.500.12588/5174
dc.languageen
dc.subjectcretaceous
dc.subjectgeophysics
dc.subjectoil
dc.subjectserpentine
dc.subjecttexas
dc.subjectvolcano
dc.subject.classificationGeology
dc.subject.classificationGeophysics
dc.subject.classificationGeotechnology
dc.titleGeophysical Characterization of a Subsurface Igneous Formation in Medina County, Texas
dc.typeThesis
dc.type.dcmiText
dcterms.accessRightspq_closed
thesis.degree.departmentGeosciences
thesis.degree.grantorUniversity of Texas at San Antonio
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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