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SAGEEP 2019
- Conference date: March 17-21, 2019
- Location: Portland, Oregon USA
- Published: 17 March 2019
1 - 20 of 59 results
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ULTRAFINE MAGNETIC PARTICLES CHARACTERIZATION AS A PROXY OF BIOGEOCHEMICAL PROCESSES AT A BROWNFIELD
More LessAuthors Andrea Ustra, Carlos Alberto, Aruã Leite, Melina Macouin and Rory DohertySummaryWe present results of magnetic properties characterization of sediment samples from a brownfield site in Brazil. The distribution of ultrafine particles correlates well with methanogens, suggesting these microbes produce the ultrafine particles. These results support the use of environmental magnetism techniques to investigate biogeochemical processes of anaerobic microbial activity.
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MULTIPLE CURRENT TRANSMISSION USING FREQUENCY DIVISION FOR RESISTIVITY AND IP PROFILING
More LessSummaryNo summary provided
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ON THE INTERPRETATION OF TRANSIENT ELECTROMAGNETIC MEASUREMENTS USING A FLOATING SET-UP ON THE VOLCANIC LAKE LAGOU DAS FURNAS IN THE AZORES
More LessAuthors B. Tezkan, M. Küpper, P. Yogeshwar, D. Kiyan, V. Rath and F. ViveirosSummaryWe have developed a floating TEM set-up for measurements on lakes which can be used in anchored and continuous mode. This system was applied on the volcanic lake in the Azores. The data is inverted one-dimensionally indicating a well conducting anomaly in different depths below the water level.
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ERT INVESTIGATION OF AN ANTECEDENT FLOODPLAIN CHANNEL-BELT
More LessAuthors J. Michael Martin, E. Everett and Peter S.K. KnappettSummaryBeneath a crop research farm, we imaged a putative buried sand channel and tracked it for ∼750 meters parallel to the Brazos River in Brazos County, TX. A natural spring at its terminus and our ERT results both suggest groundwater flows through this buried “tube” of clay-lined sand.
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UAS NOISE IN STANDOFF EMI MEASUREMENTS
More LessAuthors B. Barrowes, D. Glaser, B. Quinn, M. Prishvin, K. O’Neill and F. ShubitidzeSummaryWe present data showing the impact of unmanned aerial systems (UAS) propeller motors electrical noise on the acquisition of electromagnetic induction (EMI) signals. Multiple motor speeds and standoff distances are evaluated. Results indicate an optimum EMI sensor standoff distance from operating UAS motors.
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DELINEATION OF A CONDUCTIVE AQUIFER USING MISE-A-LA-MASSE WITH A MODIFIED ACQUISITION GEOMETRY
More LessAuthors Robert Perrin, Keith Dickson and Jane DawsonSummaryThis study described the use of the Mise-a-la-masse method with a modified acquisition geometry that allowed for the simultaneous acquisition of electrical resistivity tomography data to map the extents and orientation of an electrically conductive aquifer, as well as to delineate electrical conductors that were not connected to the aquifer.
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ENHANCING SOURCE-WATER MANAGEMENT THROUGH AIRBORNE ELECTROMAGENTIC IMAGING OF COMPLEX AQUIFER-AQUITARD SEQUENCES
More LessSummaryThis study involves a regional-scale evaluation of a frequency-domain airborne electromagnetic survey within a bedrock-groundwater-dependent region currently undergoing a water budget and water stress assessment. Geophysical data is evaluated through a comparison of airborne magnetic and electrical resistivity response with a three-dimension regional lithostratigraphic model based on high-quality borehole records.
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A HYDROSTRATIGRAPHIC UNDERSTANDING OF BURIED BEDROCK VALLEYS: COMPARING AN AIRBORNE ELECTROMAGNETIC SURVEY WITH MULTIPLE SURFACE GEOPHSICAL TECHNIQUES
More LessSummaryThis study examines potential structural controls on a local Quaternary-bedrock groundwater flow system through an integrated analysis of frequency-domain airborne electromagnetic data together with ground-based seismic refraction, electrical resistivity and gravity data. Datasets are compared across two transect over a buried bedrock valley to better understand regional groundwater flow paths.
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GEOPHYSICAL ASSESSMENT OF A PROPOSED LANDFILL SITE IN FREDERICKTOWN, MISSOURI
More LessSummaryNo summary provided
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Karst away - Geophysical surveys for resource development of a limestone quarry
More LessAuthors Alastair McClymont, Chris Slater, Glen De Paoli and Gerald KozdialSummaryWe show how high-resolution seismic refraction and ERT surveys effectively map complex geology, including karst dissolution features, at a limestone quarry. We show how the results are used to optimize borehole drilling programs and mine expansion plans.
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SINKHOLES AS TRANSPORTATION AND INFRASTRUCTURE GEOHAZARDS IN SOUTHEASTERN NEW MEXICO
More LessBy Lewis LandSummarySinkholes formed in gypsum bedrock are a widespread phenomenon in southeastern New Mexico. These features, both naturally occurring and anthropogenic, pose a significant geohazard to the area’s transportation and pipeline network. Near-surface geophysical methods, coupled with surface geologic mapping, are an effective tool in identifying potential sinkhole hazards.
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