ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

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    全球沉积–变沉积型钴成矿规律及其对宁夏钴矿找矿研究的启示

    Metallogeny of Global Sedimentary-Metasedimentary Cobalt Deposits and Their Implications for the Exploration of Cobalt Deposits in Ningxia

    • 摘要: 钴是全球战略性关键金属矿产,对国民经济建设和新兴产业发展具有重要意义。宁夏北山钴矿被认为是具有多期热液叠加改造的沉积–变沉积型钴矿床,但其成矿时代和构造背景以及钴的来源、赋存状态和迁移富集机制等研究还比较薄弱。为探讨上述问题并启示宁夏北山钴矿找矿研究,笔者系统总结了全球沉积–变沉积型钴成矿规律,其成矿时代主要集中在古元古代—新元古代,空间上主要分布于中非赞比亚–刚果金、美国爱达荷、芬兰和中国等地,与全球超大陆聚合与裂解旋回、全球大氧化和极端气候等重大地质事件有密切关系。基于上述研究,笔者认为宁夏北山钴矿研究应在成矿年代学、重大地质事件与成矿关系、含矿地层地球化学特征、物源属性及其成矿构造背景、数据驱动的钴成矿预测等方面开展深入和详细的研究,支撑服务战略性关键金属矿产找矿行动。

       

      Abstract: Cobalt is currently a globally strategic key metal mineral, which is of great significance for the construction of the national economy and the development of emerging industries. The Beishan cobalt deposit in Ningxia is considered to be a sedimentary-metamorphic cobalt deposit with multiple periods of hydrothermal superimposed transformation. However, research on its mineralization era and structural background, as well as the source, occurrence status, and migration and enrichment mechanism of cobalt, is still relatively weak. The Ningxia cobalt deposit is a sedimentary-metasedimentary cobalt, whose genesis is controlled by multi-factors such as sedimentation, metamorphism and hydrotherm. At present, the mineralization era and tectonic background of the deposit, as well as the source, occurrence state, and migration and enrichment mechanism of cobalt were poorly studied. To explore the above issues and inspire research on cobalt ore exploration in Ningxia, this study systematically summarizes the global sedimentary metamorphic cobalt mineralization patterns. The mineralization ages are mainly concentrated in the Paleoproterozoic and Neoproterozoic, and spatially distributed in Central Africa, Zambia Congo, Idaho, Finland, and China. Moreover, the formation of sedimentary-cobalt deposits is closely related to major geological events such as global supercontinent aggregation and fragmentation cycles, global large-scale oxidation, and extreme climate. Based on the above research, this study suggest that research on cobalt deposits in Ningxia region should be conducted in depth and detail in areas such as mineralization chronology, major geological events and their relationship with mineralization, geochemical characteristics of ore bearing strata, material source attributes and their mineralization tectonic background, and data-driven cobalt mineralization prediction. And this study will support the exploration of strategic key metal mineral resources.

       

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