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小秦岭金矿田中矿带是在老鸦岔背形翼部韧—脆性剪切带的基础上由含矿流体贯入形成的含金石英脉,其不仅延伸较长、延深较大,而且矿脉较宽,展布有文峪、东闯、杨寨峪、长安岔和金硐岔等大中型金矿。在概述成矿地质背景、归纳矿脉地质特征的基础上,分析了该区成矿地质作用,认为成矿流体主要来自深源,通过地幔热柱多级演化,贯入到早期韧—脆性剪切带中积聚结晶,形成一条或多条规模较大的含金石英脉,甚至出现研究区主矿脉所占有的金属储量超过矿区50%～90%的金属储量的现象。在今后的工作中,建议不要依据矿权的划分来评价矿床规模,而应根据矿脉的自然展布来统筹评价矿床规模,包括指导矿区深部和外围勘查工作。
The small ore belt in the Xiaoqinling gold ore field is a gold-bearing quartz vein formed by the intrusive fluid penetrating into the ductile-brittle shear zone of the old divergeback wing, which not only extends for a long time and has a large depth of extension, Wider, spread Wenyu, East Chuang, Yangzhai Yu, Changan fork and golden cave and other large and medium-sized gold mines. On the basis of summarizing the geological background of the metallogenic and inducing the geological features of the veins, the metallogenic geology of the area is analyzed. It is considered that the ore-forming fluid mainly comes from the deep source, and through multilevel evolution of the mantle plume, it penetrates into the early ductile-brittle shear In the zone, one or more large gold-bearing quartz veins are formed by the accumulation of crystals in the belt, and even the metal reserves occupied by the main veins in the study area exceed 50% -90% of the metal reserves in the ore area. In future work, it is suggested not to evaluate the size of the deposit based on the division of tenements, but to evaluate the size of the deposit comprehensively according to the natural distribution of the veins, including guiding the exploration in the deep and periphery of the mining area.