天水寨沟铜多金属矿区地质特征、矿床成因及找矿标志

天水寨沟铜多金属矿区位于中秦岭华力西褶皱带与北秦岭加里东构造带接合地段的反“S”型构造转折部位,区内及周边已发现多处铜、金、银、铅锌等多金属矿床,成矿条件优越。本文通过系统总结研究区多年来找矿勘查工作成果并开展地质、物探、化探、取样化验、探矿工程等工作,分析了矿区铜多金属矿床赋矿地层、构造、侵入岩、含矿地质体等地质特征及物化探异常特征,认为该矿床成因类型为中低温热液型,自然类型为石英脉型,石英露头、硅化、黄(褐)铁矿化、孔雀石化等是本矿床重要的找矿标志。研究成果可为今后本区地质勘查工作及矿山开发利用提供一定的参考。

Geological characteristics,ore genetic and ore-prospecting criteria of Zhaigou copper polymetallic deposit,Tianshui

The Zhaigou copper-polymetallic deposit is located in the anti-s-shaped tectonic transition zone at the junction of the wallisi fold belt in central Qin Mountains and the Caledonian Tectonic Belt in northern Qinling mountains, many copper, gold, silver, lead and zinc polymetallic deposits have been found in and around the area. In this paper, the authors systematically summarize the prospecting and prospecting achievements in the study area over the years and carry out geological, geophysical, geochemical, sampling and testing, prospecting engineering, etc., based on the analysis of geological characteristics, such as ore-bearing strata, structures, intrusive rocks and ore-bearing geological bodies, as well as geophysical and geochemical anomaly characteristics of the copper-polymetallic deposit in the mining area, it is considered that the genetic type of the deposit is classified as meso-low temperature hydrothermal type, the natural type is quartz vein type. Quartz outcrop, silicification, yellow (brown) iron mineralization and malachite mineralization are important prospecting indicators of the deposit. The research results can provide certain reference for the geological exploration work and the mine development and utilization in this area in the future.