金堆城超大型斑岩钼矿床地质特征及其找矿新发现
Geological Characteristics and New Prospecting Discovery of the Jinduicheng Superlarge Porphyry Molybdenum Deposit
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摘要: 金堆城超大型钼矿床处于华北地台南缘豫西断隆区,与石家湾、大石沟、文公岭、秦岭沟等钼矿床同处于老牛山岩体外接触带之金堆城-黄龙铺钼矿田内.矿床形成与区内多组构造及斑岩体具有密切关系.矿体形态与岩体形态基本一致,只是随着远离岩体,矿体形态具分枝现象,矿石品位有由富变贫的趋势.远离岩体600m后,围岩中基本不再含矿,但外围会出现一些铅(银)矿体及金矿体,矿床具有典型的斑岩型钼矿成矿模式.对该矿床在纵向、横向上地质特征的研究,对老牛山岩体外接触带其他钼矿床在深部找矿方面取得突破具有一定的指导意义.Abstract: The Jinduicheng superlarge molybdenum deposit is located at western Henan fracture-uplift area of the southern margin of North China platform. Same as the Shijiawan, Dashigou, Wengongling and Qinlinggou deposits, the Jinduicheng deposit is situated in the outside contact zone of Jinduicheng-Huanglongpu molybdenum ore fields. The formation of this deposit has close relationship with multiple sets of structure and porphyry body. The forms of ore body are basically identical as the ones of rock mass, but the ore body has branch phenomenon and its ore grade will be change from rich to poor as far from the rock mass. When the ore body is far away from the rock mass 600 meters, no mineralization occurred in wall rock, but some lead (silver) ore and gold ore bodies can be found there. Therefore, this deposit has a classical porphyry molybdenum metallogenic model. The differences and changes about geological characteristics of this deposit on longitudinal and latitudinal gradients will provide an important guiding significance for deep prespecting of the other molybdenum bodies in the outside contact zone of Laoniushan rock mass.
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