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福建中生代钼矿分布广泛,并伴生有一定的铼.通过系统研究福建中生代钼矿基本特征,总结出主要有斑岩型、岩浆期后热液型、火山热液型、构造角砾岩型(热液石英脉型)及少量矽卡岩型,选择坪地、上西坑、罗卜岭、马坑等4个典型钼矿进行重点研究.在野外地质调查、岩相学的基础上,进行了矿相学及辉钼矿矿石矿物学的系统研究,得出福建中生代钼矿中辉钼矿的晶体形态主要表现为颗粒较大(粗到中细粒),结晶度高,多呈片状、鳞片状、局部板状,多色性明显,个别矿区辉钼矿颗粒较小,结晶较差,多色性不明显;辉钼矿多型主要为2H,少量2H+3R型、3R型;辉钼矿矿物化学成分中微量杂质元素(包括Re含量,一般为(N~N×100)×10-6,并以(N~N×10)×10-6为主)较低.本区辉钼矿的这些矿物学特征说明其形成时的温度条件较高,多为中高温环境,其物源可能是壳幔混染源,且以壳源为主;中生代钼成矿在福建省内具普遍性,辉钼矿中的Re作为有益的伴生元素具有一定的综合利用价值.
Fujian Mesozoic molybdenum is widely distributed and accompanied by a certain amount of rhenium.By systematically studying the basic characteristics of the Mesozoic molybdenum mine in Fujian Province, it is concluded that there are mainly porphyry type, post-magmatic hydrothermal type, volcanic hydrothermal type, structural breccia type Hydrothermal quartz vein type) and a few skarn types, four typical molybdenites such as Pingdi, Shangxikeng, Luobuling and Makeng are selected for study. Based on the field geological survey and petrography, The systematic study of mineralogy and mineralogy of molybdenite shows that the crystal morphology of molybdenite in Mesozoic molybdenum mine in Fujian Province is mainly composed of large particles (coarse to medium fine particles), high crystallinity and mostly flake Scale, local plate, and multicolor. The molybdenite particles in individual mining areas are smaller, the crystallization is poor and the multicolor is insignificant. The polymodal molybdenite is mostly 2H, a small amount of 2H + 3R and 3R; The trace impurity elements (including Re content, generally (N ~ N × 100) × 10-6, and (N ~ N × 10) × 10-6) in the chemical composition of molybdenite are lower. These mineralogical characteristics of molybdenite indicate that the formation of high temperature conditions, mostly in high-temperature environment, the source may be crust-mantle mixed source, and the shell-based; On behalf of molybdenum mineralization universality in Fujian Province, the molybdenite Re has some value as a useful utilization of associated elements.