陆地和海洋中古今锰结核矿床的对比研究

Manganese ore is a kind of important strategic mineral resources, and the basic material in metallurgical industry. The manganese ore resources in the earth are mainly divided into two categories: one is the ancient manganese deposits formed in different geological history on the land, the other is the manganese nodules and ferromanganese crusts in the ocean which continues to grow in the modern ocean so far. This project will take as its object of research the manganese nodules from the modern ocean and the marine sedimentary manganese nodules in Dounan area of southeastern Yunnan. It will focus on comparision study of the ancient and modern manganese nodule deposits, investigation of the geological characteristics, ore controlling factors and enrichment and evolution regularity of ore-forming elements of the ancient and modern manganese nodule deposits, establishment of ore deposits origin model, discussion on the similarities and differences of mineralization, revelation of potential paleoceanographic significance. Therefore the study has its realistic and theoretical significance in understanding the process and occurrence regularity of manganese deposits, enriching ore forming theory of manganese deposits ,developing the geology of ore deposit comparison, and guiding exploration and assessment of manganese resources.

锰矿是一种重要的战略资源，是冶金工业的重要原料。地球上的锰矿资源主要分为两大类：一类是分布在陆地上的不同地史时期形成的古代锰矿床；另一类为分布在大洋中的迄今仍在不断生长着的现代海底锰结核和结壳。我国滇东南地区斗南锰矿带中海相沉积锰结核与现代海洋锰结核存在若干相似之处，具有可比性。本课题从比较矿床学的角度，以采自现代海洋中的锰结核与滇东南斗南锰矿带典型锰矿床中的古代锰结核为研究对象，采用先进的分析测试技术，开展古今锰结核矿床的对比研究，查明古今锰结核矿床的地质特征、控矿因素、成矿元素富集和演化规律，建立成矿模式，探讨成矿异同，并揭示其所蕴含的古海洋意义。本课题的开展，对于了解锰矿床形成过程和赋存规律，丰富锰矿床成矿理论，发展比较矿床学，指导我国锰矿资源勘查评价具有重大的现实意义和理论意义。

锰矿是一种重要的战略资源，是冶金工业的重要原料。地球上的锰矿资源主要分为两大类：一类是分布在陆地上的不同地史时期形成的古代锰矿床；另一类为分布在大洋中的迄今仍在不断生长着的现代海底锰结核和结壳。本课题从比较矿床学的角度，以采自现代海洋中的锰结核与滇东南地区斗南锰矿带中典型锰矿床的古代锰结核为研究对象，主要对两种类型锰结核进行了地质背景、产出状态、结构构造、矿物学、元素地球化学、物质来源、成矿环境和成矿过程的对比研究，查明了古今锰结核的地质地球化学特征、控矿因素、成矿元素富集规律、成因机制和成矿异同。这些研究结果对于了解锰矿床的形成过程和赋存规律、丰富锰矿床成矿理论、发展比较矿床学、指导我国锰矿资源勘查评价具有重要的理论意义。