西秦岭温泉岩体岩石地球化学与含矿性分析

Geochemistry and Ore Bearing Properties of the Wenquan Granite Pluton in Western Qinling Mountains

温泉钼矿是至今为止在西秦岭造山带上所发现的最大的一个斑岩型钼矿床,钼矿床产于温泉复式花岗岩体内部,钼矿化主要与陈家大湾细粒二长花岗斑岩和岩体裂隙有关。通过对温泉岩体不同期次侵入体中的钼元素含量统计,发现钼元素含量矿区范围内的岩体中高于外围,细粒二长花岗斑岩中的钼元素含量高于早阶段两次侵入的岩体,认为温泉钼矿床的钼元素主要来自于细粒二长花岗斑岩。通过对三次侵入的岩体地球化学特征与国内典型的斑岩型矿床地球化学特征的对比研究,认为温泉钼矿为斑岩型钼矿床,具斑岩钼成矿专属性。

The Wenquan molybdenum deposit is the largest porphyry-type molybdenum deposit ever discovered in western Qinling orogenic belt, the orebodies of this deposit occur in the Wenquan compound granite rockbody and the molybdenum mineralization is thought to be related to the fine-grained monzonite granite-porphyry that is exposed in Chenjiadawan and the fissures developed in the rockbody.Through counting the molybdenum element content of Wenquan Mo ore deposit and the three different periphery plutons, it finds that the molybdenum contents of plutons in mine area and fine-grained monzogranite porphyry stocks are higher than that of mine area periphery and the two early stage plutons, respectively. So the molybdenum element of Wenquan Mo ore deposit is mainly from fine-grained monzogranite porphyry. Wenquan Mo ore deposit has the metallogenic specialization of porphyry Mo ore deposit by contrast studies of the geochemical features of the three plutons and the domestic classic porphyry Mo deposits.