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

该项目的目的是调查沉积盆地深埋和受热力强烈影响的地区的氮循环。除了固定在有机和无机沉积物质中的氮之外，在中欧盆地的某些地区还存在大量的游离分子氮(N2)积累。到目前为止，这种分子氮是否以及在什么条件下从沉积物质中释放出来，或者它是否部分来自“深源”(地幔来源)，目前还不完全清楚。拟开展的研究工作将集中于古生代沉积层序中有机氮和无机氮的化学和同位素特征。这两个储存库之间的相互作用以及分子氮释放的机制和条件将被研究。作为这项跨学科研究的结果，我们期望在沉积盆地的构造和热演化过程中对流体形成和运移的认识有根本的改善。这也将对中欧盆地和其他富含氮气的省份的烃类天然气勘探战略产生重要影响。

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.