甘肃文县阳山金矿床高楼山矿段构造叠加晕地球化学特征及岩浆—构造—成矿耦合关系简析  

Geochemical characteristics of structural superposition halo and coupling relationship between magma-structure-mineralization in Gaoloushan segment of Yangshan gold deposit,Wenxian County,Gansu Province

作　　者：赵阳 黄勇[1] 尹福光[1] 次仁拉姆 杨忠虎 熊韬 孟繁华 Zhao Yang;Huang Yong;Yin Fuguang;Ciren Lamu;Yang Zhonghu;Xiong Tao;Meng Fanhua(Civil-Military Integration Center of China Geological Survey,Chengdu 610036;School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083)

机构地区：[1]中国地质调查局军民融合地质调查中心,成都610036 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《地质科学》2024年第2期484-497,共14页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：中国地质调查局军民融合地质调查中心“甘肃省文县阳山金矿资源基地综合调查”项目(编号:DD20220971)资助。

摘　　要：甘肃文县阳山金矿是产于勉县—略阳弧形缝合带中段内的超大造山型金矿床。在26年的勘探工作中,安坝和葛条湾矿段一直是阳山金矿勘查的核心矿段。高楼山矿段于2021年正式进入普查阶段。本文旨在更好地了解矿区的深部隐伏盲矿,并对其未来的发展前景进行预测。结果表明,高楼山矿段69号勘探线剖面的成矿及伴生元素构造叠加晕的轴(垂)向分带序列从上而下依次为:Cu-As-Pb-Zn-Mn-Co-Ag-Au-Sb-Mo-Bi;共圈定两处深部找矿靶区,在1850 m标高处,213号矿脉的前缘晕仍然存在,而且随着深度的增加,前缘晕的强度也在不断加强,这表明矿体正在向更深处延伸;而在1750 m标高处,前缘晕的增强更加显著,这暗示着深部可能存在隐伏的矿体。此外,在分析69号勘探线3个钻孔构造叠加晕的基础上,提出新的阳山金矿构造控矿模式——推覆体复式褶皱构造控矿,并对ZK4901岩心的千枚理、断层、岩体、矿(化)体产状特征,利用统计分析方法进一步佐证了该模式。本文研究认为阳山金矿主体受逆冲断裂构造作用控制,含矿构造以北倾为主,局部受到褶皱的制约,岩浆岩主要沿断裂带产出,可形成矿(化)体,并根据岩浆岩有无矿化,将矿(化)体产出类型分为“2大类、5小类”,同时指出岩浆热液与成矿关系密切,但高品位的矿体主要分布在千枚岩中。这将为今后的勘探和开采提供重要的参考。The Yangshan gold deposit in Wenxian County,Gansu Province,is a super-large-scale orogenic gold deposit occurring in the middle section of the Mianxian-Lueyang arcuate suture zone.During the 26-year exploration period,the Anba and Getiaowan mining sections have always been the core mining sections of the Yangshan gold deposit.The Gaoloushan mining section officially entered the census stage in 2021.The aim of this paper is to better understand the deep concealed ore bodies in the mining area and predict its prospecting potential.The research results show that the axial(vertical)zoning sequence of the ore-forming and associated elements in the No.69 exploration line profile of the Gaoloushan mining section is:Cu-As-Pb-Zn-Mn-Co-Ag-Au-Sb-Mo-Bi.Two deep prospecting target areas are delineated.At an elevation of 1850 m,the front halo of No.213 vein still exists,and with the increase of depth,the intensity of the front halo continues to strengthen,indicating that the ore body is extending deeper.At an elevation of 1750 m,the enhancement of the front halo is more significant,suggesting the possible presence of hidden ore bodies at depth.In addition,based on the analysis of the construction superposition halo of three drill holes in the No.69 exploration line,a new structural control model for the Yangshan gold deposit(the nappe complex fold structure control)is proposed.The occurrence characteristics of phyllite,fault,rock mass and ore(mineralization)body in the ZK4901 core are analyzed using statistical analysis methods to further confirm this model.It is believed that the Yangshan gold deposit is mainly controlled by the inverse fault structure,with the ore-bearing structure mainly inclined to the north and locally constrained by folding.Magmatic rocks occur along the fault zone,forming ore(mineralization)bodies.The ore(mineralization)body output types are divided into“2 categories and 5 subcategories”according to the presence or absence of magmatic mineralization.It is pointed out that magmatic hydrothermal fluid

关 键 词：阳山金矿 地球化学 构造叠加晕模式 深部找矿 远景评价 成矿模式 

分 类 号：P612[天文地球—矿床学] P618.51[天文地球—地质学]