蟒岭岩体东部钼矿化地质特征

摘要

Five Mo mineralized belts including Xiashuimo, Miaogou, Liujiagou, Dashugou and Jiangou have been found in East of Mangling rock mass, the south of Langcao, Guangpo, Henan province. The Mo ore bodies are vein or lay occurrence. The metallic minerals of Mo ore are molybdenite, hematite, pyrite and chalcopyrite. The ore types include granite pegmatite type, quartz vein type, altered granite type and schist type, and there are two mineralized types which are vein type and contact alteration type. The characteristics of trace elements and REE are high Sr, Ba, LREE, Sr/Y and La/Y, low HREE, Y, Mg and Rb/Sr, loss Nb, Ta, Ti and P, and no obvious Eu negative abnormity. The mineralizing fluid of Mo deposit came from silica-rich and K-rich monzonitic granite, and the Mo ore mineralized in Yanshan Period.%在蟒岭岩体东部的河南卢氏官坡兰草以北地区发现下水磨、庙沟、刘家沟、大树沟、箭沟5个钼矿化段。钼矿体呈脉状或层状产出。钼矿石的金属矿物主要为辉钼矿、赤铁矿、黄铁矿、黄铜矿等，矿石类型为花岗伟晶岩脉型钼矿石、石英脉型钼矿石、蚀变花岗岩型钼矿石、片岩型钼矿石，矿化类型分为岩脉型和接触蚀变带型。微量元素和稀土元素具高 Sr、Ba、LREE、Sr/Y、La/Y，低 HREE、Y、Mg、Rb/Sr，亏损 Nb、Ta、Ti、P，无明显负 Eu 异常的特征。钼矿化成矿物质流体来源于燕山期富硅、富钾二长花岗岩，钼矿成矿时代可能发生在燕山期。