Hydrocarbon induced changes of magnetic properties in soil

碳氢化合物引起土壤磁特性的变化

• 批准号: 20887088
• 负责人: Professor Dr. Erwin Appel
• 金额: --
• 依托单位: Arbeitsgruppe Geophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/20887088?language=en
• 关键词: Hydrocarbon; induced; changes; magnetic; properties

It is widely accepted that magnetic proxy measurements can serve as a fast and efficient tool for screening anthropogenic heavy metal accumulation in soils and sediments. There is also some indication that the input of hydrocarbons into soils lead to a change of soil magnetic properties. Within this proposal we want to study the relationship between magnetic properties of soil and the presence organic compounds at the former oil field Wietze in northern Germany. Oil was penetrating there into soil and people exploited these resources in surficial oil pits already since -400 years. Hydrocarbon concentration is still severe at several places and clearly dominates other effects, therefore providing an ideal test site to identify the role of input of organic compounds on the soil magnetic properties. The present study will include quantification of magnetic properties in respect to oil concentration and chemistry, history of exploitation, soil characteristics and, very important, geomicrobiological processes involving microbially catalyzed redox transformation of iron minerals that lead to changes in the magnetic mineralogy of soil. Results will be relevant for both using magnetic proxies (1) to qualitatively or semiquantitatively delineate organic contamination of soil and (2) to contribute to the development of a supplementary tool for hydrocarbon exploration/exploitation.

磁性代用指标是一种快速、有效的土壤和沉积物中重金属人为富集的筛选工具。也有一些迹象表明，碳氢化合物输入到土壤中导致土壤磁性的变化。在这个建议中，我们要研究土壤的磁性和存在有机化合物在前油田Wietze在北方德国之间的关系。石油渗透到土壤中，人们在地表石油坑中开采这些资源已经有-400年了。碳氢化合物的浓度仍然是严重的，在几个地方，显然主导其他影响，因此提供了一个理想的测试网站，以确定输入的有机化合物对土壤磁性的作用。目前的研究将包括量化的磁性方面的石油浓度和化学，历史的开采，土壤特性，非常重要的是，地质微生物学过程，涉及微生物催化的氧化还原转化的铁矿物，导致土壤的磁性矿物学的变化。结果将与使用磁性代用指标（1）定性或半定量地描述土壤的有机污染和（2）有助于开发油气勘探/开发的辅助工具有关。