福建沿海一些钼矿床中辉钼矿多型性的初步研究

本区一些有代表性钼矿床（点）的辉钼矿据Ｘ光衍射分析、电子探针分析等方法，查明的化学成份、微量元素分布特征、多型类型以及不同多型辉钼矿的显微硬度、比重、反射率及成矿温度等，初步得出以下几点结论： １）本区辉钼矿以２Ｈ１型为主，２Ｈ１＋３Ｒ型少数。 ２）２Ｈ１和２Ｈ１＋３Ｒ型辉钼矿在物理性质、形态和微量元素（Ｒｅ、Ｓｅ、Ｔｅ）的含量等方面都有较明显的差别。 ３）２Ｈ１型辉钼矿形成温度较高，集中地分布在斑岩型钼矿床中，２Ｈ１＋Ｒ型辉钼矿则多见于成矿温度相对低的热液石英脉型钼矿床中或经过蚀变及后期构造变动的地段。

A Preliminary Study of Molybdenite Polymorphism in some Mo Deposits in the Coastal Reginon of Fujian

Through inve stigation of molydenites from representative deposits in this area have revealed the chemical composition, characteristics of trace elements distribution, mierohardness, specific gravity, reflectivity and metallogenic temperature of different molybdenite polymorphs. The results indicated that 2H, molybdenite polymorphs predominate in this area, whilc 2H1 + 3R polymorphs are in the minority. And 2H1 polymorphs are mostly seen in porphyry Mo deposits, while 2H 1 +3R polymorphs nostly occur in hydrothermal quartz vein type deposits formed under relatively low temperatre or in later structurally altered sectors.