Geochemical, isotope geochemical and mineralogical investigations on type, origin and transformation of nitrogen in Palaeozoic sedimentary rocks

古生代沉积岩中氮的类型、来源和转化的地球化学、同位素地球化学和矿物学研究

• 批准号: 5369730
• 负责人: Dr. Bernhard M. Krooß
• 金额: --
• 依托单位: Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5369730?language=en
• 关键词: Geochemical; isotope; geochemical; mineralogical; investigations

The aim of the project is the investigation of the nitrogen cycle in deeply buried and thermally strongly affected zones of sedimentary basins. Besides the nitrogen fixed in organic and inorganic sedimentary material, substantial accumulations of free, molecular nitrogen (N2) occur in certain areas of the Central European Basin. Up to now it is not entirely clear if and under which conditions this molecular nitrogen is liberated from sedimentary matter or whether it is derived partially from "deep sources" (mantle sources). The proposed research work will focus on the chemical and isotopic characterisation of the organic and inorganic nitrogen in Palaeozoic sedimentary sequences. The interactions between these two reservoirs and the mechanisms and conditions of the liberation of molecular nitrogen will be investigated. As a result of this interdisciplinary study we expect fundamental improvements in the perceptions of fluid formation and migration in the course of the structural and thermal evolution of sedimentary basins. This will also have important implications on the exploration strategies for hydrocarbon gases in the Central European Basin and other provinces with N2-rich natural gases.

该项目的目的是调查沉积盆地深埋和热强烈影响区的氮循环。除了固定在有机和无机沉积物中的氮之外，在中欧盆地的某些地区，游离分子氮（N2）也大量积累。到目前为止，尚不完全清楚这种分子氮是否以及在何种条件下从沉积物中释放出来，或者它是否部分来自“深部来源”（地幔来源）。建议的研究工作将集中在古生代沉积序列中有机和无机氮的化学和同位素特征。这两个水库之间的相互作用和分子氮的释放的机制和条件进行了研究。作为这种跨学科研究的结果，我们期望在沉积盆地的构造和热演化过程中的流体形成和迁移的看法有根本的改善。这也将对中欧盆地和其他富含N2天然气的省份的烃类气勘探战略产生重要影响。