太行山北段岭东金矿地质特征及成因探讨  

Geological Characteristics and Genesis of Lingdong Gold Mine in Northern Part of Taihang Mountains

作　　者：许立风 王璐阳 蔡毅 王志敏 王丰翔 孙欣宇 XU Lifeng;WANG Luyang;CAI Yi;WANG Zhimin;WANG Fengxiang;SUN Xinyu(Geological Engineering Exploration Institute of Hebei Province,Baoding 071051,China;Hebei Key Laboratory of Study on Porphyry Deposit,Baoding 071051,China;Hebei GEO University,Shijiazhuang 050031,China)

机构地区：[1]河北省地质工程勘查院,河北保定071051 [2]河北省斑岩型矿床研究重点实验室,河北保定071051 [3]河北地质大学,河北石家庄050031

出　　处：《河北地质大学学报》2025年第1期17-24,共8页Journal of Hebei Geo University

基　　金：河北省地矿局地质科技项目(13000024P00329410271U);河北自然资源厅地质勘查项目(13000023P00F2D4102525);河北省自然资源厅科研项目(Z2024044)。

摘　　要：岭东金矿位于太行山北段多金属成矿带西北缘,处于NNE向紫荆关深断裂带及NW向断裂交汇部位。近年来在岭东金矿区发现了隐爆角砾岩型金矿及斑岩型金矿(化)体。关于该矿床的成因研究欠缺,制约了该矿床规模的提高。调查研究显示,岭东金矿断裂构造、隐爆角砾岩构造发育,岩浆活动剧烈,硅化、黄铁矿化强烈,矿体围岩是隐爆角砾岩、花岗斑岩。花岗斑岩、斑状二长花岗岩锆石U-Pb年代学研究表明,成矿流体年龄为125~129 Ma,稍晚于山西义兴寨金矿(141±1 Ma)。矿床成因与义兴寨金矿相似,与多期构造-岩浆活动密切相关。岭东金矿属于早期岩浆期后热液石英脉-蚀变岩型、晚期隐爆角砾岩型,深部为斑岩型的金矿。Lingdong gold mine is located in the northwest margin of polymetallic metallogenic belt in the northern part of Taihang Mountains,at the intersection of the NNE-trending Zijingguan deep fault zone and the NNW trending fault zone.In recent years,cryptoexplosive breccia type gold deposits and porphyry type gold orebody have been discovered in Lingdong gold mining area.The lack of research on the genesis of the deposit restricts the improvement of the scale of the deposit.The investigation shows that the Lingdong gold deposit has developed fault structure and cryptoexplosion breccia structure,intense magmatic activity,strong silicification and pyritization,and the surrounding rock of the orebody is cryptoexplosion breccia and granite porphyry.Zircon U-Pb chronology of granite-porphyry and porphyritic monzonitic granite shows that the ore-forming fluid age is 125~129 Ma,which is later than the Yixingzhai gold mine(141±1 Ma)in Shanxi Province.The genesis of the deposit is similar to that of Yixingzhai gold mine,and it is closely related to multi-stage tectonic-magmatic activity.The early type of Lingdong gold deposit is post-magmatic hydrothermal quartz vein-altered rock type,the late type is cryptoexplosive breccia type,and the deep type is porphyry type gold deposit.

关 键 词：太行山北段 岭东 金矿 地质特征 矿床成因 

分 类 号：P596[天文地球—地球化学]