东秦岭中酸性小岩体微量元素地球化学特征与钼矿床成矿的关系  

RELATIONSHIP BETWEEN GEOCHEMICAL CHARACTERISTICS OF ACIDIC SMALL ROCK MASS AND MOLYBDENUM DEPOSIT IN EAST QINLING

作　　者：吴飞[1] 付恒一[1] 吴瑶 何芳蕊 

机构地区：[1]河南省地质矿产勘查开发局第二地质勘查院,河南郑州451464

出　　处：《中国钼业》2018年第1期12-16,共5页China Molybdenum Industry

摘　　要：矿床的成矿母岩对于成矿及成矿序列的形成具有决定性作用。东秦岭中酸性小岩体众多,矿产资源极为丰富,特别是钼矿资源在我国是首屈一指。矿床的成矿岩体中微量元素尤其是与成矿相关元素的多少,直接影响着成矿的进程和矿床的规模、品位。就钼矿而言,花岗斑岩内钼的丰度值一般为维诺格拉多夫花岗岩丰度值的几十倍至几百倍,属于特富集级别。岩体中Mo元素的载体矿物主要有斜长石、黑云母、钾长石、石英4种造岩矿物。正是由于岩体中的矿物质丰富含量,含钼岩浆上侵至上地壳遇到地下水经水岩反应而形成的含矿气水热液中的钼的浓度就特别高,形成大量的含钼蚀变脉体就更容易贯入、充填、沉积成矿。而所形成的矿种就取决于与岩浆演化相关的基底地层中的矿物质种类,陕西华县金堆城为单一的钼矿床,河南栾川南泥湖、上房沟及三道庄则形成钼(钨)、钼(铁)等多金属矿床,说明在成矿母岩与地层之间有较复杂的交代作用发生。Mineralization parent rocks of mineral deposits play a decisive role in the formation of metallogenic and metallogenic sequences. There is a large number of small rock mass in East Qinling, mineral resources are extreme-ly rich, especially molybdenum resources. The amount of trace elements in the ore - forming rock mass, especially the number of ore - related elements, directly affects the process and the scale and grade of the mineralization process. In terms of molybdenum ore, the abundance of molybdenum in granite porjDhyr i generally to several hundred times the abundance value of Vinogradov granite, which belongs to the rich enrichment level.The Mo minerals in the rock are mainly plagioclase, biotite, potassium feldspar and quartz. It is due to the rich con-tent of minerals in the rock mass, molybdenum-containing m a g m a on the upper crust encounteredter by the water rock reaction and the formation of ore gas hydrotliermal molybdenum concentration is particularly high, the formation of a large number of molybdenum variable veins is easier to penetrate,fill, and accumulate mineralization. And the formation of minerals depends on the evolution of m a g m a associated mineral species, Jinduicheng molybdenum mine in Shaanxi is a single molybdenum deposit, Nannihu, Shangfang-gou, and Sandaozhuang in Henan are the formation of molybdenum （tungsten ）,molybdenum （iron） and otherpolymetallic deposits, indicatig that in the more complex role happened between metasomatroJk and strata.

关 键 词：中酸性小岩体 微量元素 丰度值 载体矿物 

分 类 号：P618.65[天文地球—矿床学]