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Magnetic susceptibility of environmental objects in the hydrocarbon presence
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 14th EAGE International Conference on Geoinformatics - Theoretical and Applied Aspects, May 2015, Volume 2015, p.1 - 6
Abstract
Summary
The measurements of soil magnetic susceptibility are an express and high-performance method for studying the hydrocarbons influences to the geological layers and soil. The informational content of the soils magnetic researches in the presence of hydrocarbons is: soil magnetic anomalies grading, the hydrocarbon fluid impact to the environmental magnetism, the change of the magnetic susceptibility of soils as a result of the autogenic magnetic minerals formation under the influence of refined production, technogenic and anthropogenic pollution by hydrocarbons. The magnetic susceptibility and its frequency dependence give the opportunity to identify and explain the processes mentioned above. Microorganisms are involved in the biodegradation of petroleum products. To determine the pedogenic, technogenic and, presumably, hydrocarbon-induced magnetic signals in soils, we used the frequency dependent magnetic susceptibility analyses. Non-polluted soils show lower values of magnetic susceptibility than those containing traces of hydrocarbons. For the entire sample, MS×10–8 m3/kg is: 7≤ MSlf ≤68, the mean is 21; Kfd: 3≤Kfd≤34, the mean is 8. Our findings suggest that the Kfd values are more than 3% and there is a straight regression dependence. Therefore, the soils of the studied hydrocarbon field are non-polluted and their magnetism can only be of pedogenic or hydrocarbon origin.
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