投稿时间：2021-12-05
修订日期：2023-07-29
网络发布日期：2023-12-29
中文摘要:复兴屯银铅锌矿床位于大兴安岭南段中生代宝石火山沉积盆地内，是内蒙古近年来地质找矿的一大突破。文章通过分析复兴屯区域地质背景及矿床地质特征，详细介绍了地球物理及地球化学在该矿床找矿过程中的应用，最后总结了矿床的找矿标志。复兴屯银铅锌矿体产于晚侏罗世—早白垩世陆相火山碎屑岩内，其形态、规模、产状受火山机构-网格状断裂构造体系控制，呈“拱形”产出。矿床以独立银矿体、银铅锌共生矿体为主，其次为锌矿体、铅矿体、锌铅矿体，均为隐伏矿体。矿体形态为似层状、透镜状，主要矿化蚀变有叶腊石化、绿泥石化、高岭土化、碳酸盐化、菱锰矿化、闪锌矿化、方铅矿、黄铁矿化，局部见黄铜矿化。该矿床推断Ag金属资源量5258 t，平均品位198.21 g/t；Zn金属推断资源量17.6万t，平均品位1.61%；Pb金属推断资源量3.3万t，平均品位1.36%，达超大型规模。文章初步总结出复兴屯矿床找矿标志：晚侏罗世—早白垩世陆相火山碎屑岩、网格状断裂构造体系、破火山口和火山盆地、矿化蚀变（铁锰碳酸盐化、硅化、叶腊石化、黄铁矿化、铅锌矿化）、平面及垂向Ag-Pb-Zn-CuAu元素异常组合、环状平稳负磁异常和低阻高极化激电异常。复兴屯超大型银铅锌矿床地质特征及找矿标志的研究为大兴安岭地区类似矿床提供找矿思路，同时也为该区寻找隐伏矿体提供一种有效的勘查模型。
Abstract:The giant Fuxingtun Ag-Pb-Zn deposit is located in the Mesozoic Baoshi volcanic-sedimentary basin of the southern Da Hinggan Mountains. The discovery of this deposit is a major breakthrough in geological prospecting in Inner Mongolia in recent years. The orebodies of the deposit occur within the Late Jurassic-Early Cretaceous continental pyroclastic rock and are controlled by both the volcanic mechanism and grid fault structural system. The inferred resource of Ag metal is 5258 t with an average grade of 198.21g/t, the inferred resource of Zn metal is 1.76 hundred thousand tons with an average grade of 1.61%, and the inferred resource of Pb metal is 0.33 hundred thousand tons with an average grade of 1.36%. Based on the analyses of the regional geological setting and geological characteristics of the Fuxingtun deposit, it is preliminarily considered that the prospecting indicators of this type of deposit are as follows: ① Late Jurassic-Early Cretaceous continental pyroclastic rocks; ② grid fault structural system; ③ caldera and volcanic basin; ④ Fe-Mn carbonation, silicification, pyrophrllitization, pyritization, Pb-Zn mineralization; ⑤ Ag-Pb-Zn-Cu-Au element anomaly combinations; ⑥annular stable negative magnetic anomaly; and ⑦ low resistance and high induced polarization anomaly. Through the study on the geological characteristics and prospecting indicators of the Fuxingtun deposit, this paper aims to provide prospecting ideas for similar deposits in the Da Hinggan Mountains and also provide an effective exploration model for finding concealed ore bodies in this area.
keywords:geological characteristics prospecting indicators Ag-Pb-Zn deposit Fuxingtun southern Da Hinggan Mountains
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基金项目:本文得到内蒙古自治区地质勘查基金管理中心项目（编号：11-1-KC11）资助
引用文本：
李海军,张善明,梁新强,胡二红,郝智慧,王亚楠,武斌,康建飞,白涛,周立军.2023.内蒙古复兴屯超大型银铅锌矿床地质特征及找矿标志[J].矿床地质,42(6):1175~1194LI HaiJun,ZHANG ShanMing,LIANG XinQiang,HU ErHong,HAO ZhiHui,WANG YaNan,WU Bin,KANG JianFei,BAI Tao,ZHOU LiJun.2023.Geological characteristics and prospecting indicators of Fuxingtun giant Ag-Pb-Zn deposit in Inner Mongolia[J].Mineral Deposits42(6):1175~1194
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