Organic-Inorganic Interactions in Kupferschiefer – How did organic matter control mineralization?

Kupferschiefer 中的有机-无机相互作用 有机质如何控制矿化？

• 批准号: 521624680
• 负责人: Dr. Kai Mangelsdorf
• 金额: --
• 依托单位: Max-Planck-Institut für Biogeochemie (MPI-BGC)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/521624680?language=en
• 关键词: Organic; Inorganic; Interactions; Kupferschiefer; How

Organic matter (OM) is frequently associated with ore deposits, but is largely not considered as a co-genetic factor. Thus, new fundamental insights are required to elucidate the role of organic-inorganic interactions during the formation of ore deposits. It is the aim of this proposal to examine the impact of OM on the ore forming process in the “Kupferschiefer system”, which offers the potential to act as “analogue” also for a wider picture of stratiform base metal sulphide deposits using a multi-proxy approach based on cutting-edge analytical technologies. The “Kupferschiefer system” was economically important since the Middle Age. Today mining still exists in Poland whereas activities in Germany are mainly ceased. However, there are considerations about mining the Spremberg deposit (Brandenburg, Saxony) and currently drilling activities in Thuringia are in place again. A specific feature of the Kupferschiefer system in Germany and Poland is that it was largely not overprinted by elevated thermal stress, thus allowing organic geochemical and imaging analyses of the OM. It is this low thermal maturity (mainly early oil window) in southern Brandenburg, Saxony Anhalt and northwestern Bavaria which makes the Kupferschiefer a suitable natural laboratory and -via extrapolation- a potential analogue even for older systems with higher thermal maturities, for which the exploration, evaluation and exploitation efforts can be improved. The proposed multi-proxy approach will fill a fundamental gap in studies that largely lack microscale-resolved analyses of organic-inorganic interactions. The project concept combines standardized organic geochemical (e.g., GC-MS) and imaging techniques (organic petrography, SEM, TEM) with up-to-date advanced methods like Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) for the elucidation of organic NSO compounds for ore formation processes. Further new methodologies will be applied such as scanning transmission X-ray microscopy (STXM) and molecular imaging mass spectrometry (MALDI-MSI), that enable the characterization of organic bonding types and spatial molecular occurrence.

有机质（OM）经常与矿床有关，但在很大程度上不被认为是一个共同成因的因素。因此，需要新的基本见解来阐明有机-无机相互作用在矿床形成过程中的作用。本提案的目的是研究有机物对“Kupferferferferferfer系统”中成矿过程的影响，该系统有可能利用基于尖端分析技术的多代用指标方法，对更广泛的层状贱金属硫化物矿床进行“模拟”。自中世纪以来，“库普费托费”制度在经济上起着重要作用。今天，波兰仍有采矿活动，而德国的采矿活动基本上已停止。然而，有关于开采Spremberg存款（勃兰登堡，萨克森）的考虑，目前图林根州的钻探活动再次到位。在德国和波兰的Kupferkenefer系统的一个具体特点是，它在很大程度上没有被高的热应力叠加，从而允许有机地球化学和成像分析的OM。正是这种低的热成熟度（主要是早期石油窗口）在南部勃兰登堡，萨克森安哈尔特和巴伐利亚西北部，使Kupferenefer一个合适的天然实验室和-通过外推-一个潜在的类似物，即使是较老的系统具有较高的热成熟度，勘探，评价和开发工作可以改善。所提出的多代理方法将填补研究中的一个根本空白，在很大程度上缺乏微观尺度分辨分析的有机-无机相互作用。该项目的概念结合了标准化的有机地球化学（例如，GC-MS）和成像技术（有机岩相学、SEM、TEM）以及最新的先进方法，如傅立叶变换离子回旋共振质谱（FT-ICR-MS），用于阐明成矿过程中的有机NSO化合物。进一步的新方法将被应用，如扫描透射X射线显微镜（STXM）和分子成像质谱（MALDI-MSI），使有机键合类型和空间分子发生的表征。