福建建瓯罗山钼矿床地质特征及深部找矿潜力分析

Geological characteristics and depth prospecting prediction of Mo deposit in Luoshan,Jian′ou county,Fujian Province

建瓯罗山钼矿产于晚侏罗世黑云母正长花岗岩体内,受北北东—北北西向断裂及次级断裂控制,蚀变上部为硅化-绢云母化,下部为硅化-钾化,矿石类型主要为构造角砾型和石英细脉型。结合成矿地质条件分析认为成矿物质主要来源于隐伏-半隐伏的花岗斑岩,属广义的斑岩型钼矿,深部仍具有较大找矿潜力。

The Mo orebodies of Luoshan deposit are produced on late Jurassic biotite-syenogranite, which are controlled by NNE-NNW main faults and secondary faults. The spatial alteration distribution of ore bodies possess the characteristic of vertical zone, with the upper alteration is siliconization-sericitization and the under is siliconization-potassium alteration. The main ore types are tectonic hreccisa type and quartz vein type. The genesis type of the deposit be- longs to generalized propory Mo deposit, by the main metallogenic materials of Luoshan Mo deposit are provided by concealed and semi-concealed granite porphyry. By the study on the geological condition of mineralization and prospecting information, it is preliminary thought that the deposit has a better ore-finding future prospect in the depth.