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在野外考察和室内综合研究基础上,从地层岩性、岩相古地理、地质构造等成矿地质条件的分析入手,结合稳定同位素测试数据分析,以古丈锰矿田中的野竹锰矿为例,对湘西北民乐式锰矿床的成矿地质特征及成矿机制进行了探讨,认为区内成矿物质(锰)是多来源的,但主要来源于海底火山活动。在成矿作用过程中,堆集在火山喷口附近的沉积物被烘热的海水淋滤改造,从中析出锰质;由热海水体所挟带,随海流迁移,成矿物质在裂陷槽中沉积下来富集形成锰矿床。民乐式锰矿床属离火山喷发中心较远的海底火山喷发一沉积锰矿床。
Based on field investigation and indoor comprehensive study, starting with the analysis of stratigraphic lithology, lithofacies palaeogeography and geological structure and other metallogenic geological conditions, and combining with the stable isotope test data analysis, taking the wild bamboo-manganese ore in the Guzhang manganese orefield as an example, The mineralization geological characteristics and metallogenic mechanism of the Minle manganese deposit in the northwestern Hunan Province are discussed. It is concluded that the metallogenic material (Mn) in the area is multi-sourced but mainly derived from submarine volcanic activity. During the process of metallogenesis, sediments accumulated near volcanic vents are leached and transformed by the hot seawater, and manganese is precipitated from it; entrained by the hot seawater bodies, and migrated with the sea currents, the ore-forming materials are deposited in the rift trenches Down to enrich the formation of manganese deposits. The Minle manganese deposit is submarine volcanic eruption-sedimentary manganese deposit far away from the volcanic eruption center.