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Abstract: Determining the Origin of Soil Previous HitMagneticNext Hit Susceptibility Anomalies in Hydrocarbon Environments

COGOINI, MONIKA, University of Oklahoma, School of Geology & Geophysics, Norman, OK

Soil Previous HitmagneticNext Hit susceptibility anomalies caused by Previous HitmagneticNext Hit mineral authigenesis have been reported from hydrocarbon environments. The mechanisms that could be responsible for the formation of the new Previous HitmagneticNext Hit phases (e.g., magnetite) in such environments have only been described in theory. For example, several types of microorganisms, including magnetotactic, iron-reducing, and sulfate-reducing bacteria are capable of producing Previous HitmagneticNext Hit minerals. It has not been investigated, however, whether those bacteria could be responsible for the anomalous Previous HitmagneticNext Hit susceptibilities. The purpose of this study is to test for a biogenic origin of authigenic Previous HitmagneticNext Hit minerals above two oil fields, in the cap soil of a landfill, and in laboratory experiments. Previous HitMagneticNext Hit susceptibility will be measured above and away from the oil fields. Samples will be analyzed for their Previous HitmagneticNext Hit mineralogy, Previous HitmagneticNext Hit characteristics, and for the presence of microorganisms that could cause the Previous HitmagneticNext Hit mineral formation. Furthermore, the soil of a capped landfill which has locally elevated Previous HitmagneticNext Hit susceptibilities will be microbiologically analyzed. In addition soil samples from control areas will be exposed to: hydrocarbons in the laboratory and Previous HitmagneticNext Hit susceptibilities and microbial content will be monitored over time Understanding the processes that cause anomalous Previous HitmagneticTop susceptibilities as detected by a rapid, nearly noninvasive, and inexpensive method in hydrocarbon environments is important for hydrocarbon exploration and seepage detection in the environmental field.

AAPG Search and Discovery Article #90931©1998 AAPG Foundation Grants-in-Aid