冀东幔枝构造及其相关金矿床地质特征研究  

Study on the Geological Characteristics of Mantle Branch Structure and Related Gold Deposits in Eastern Hebei Province

作　　者：吕水 许曼 刘海龙[1] 杨爱雪 韦文国 吴再忠 安梦莹 LV Shui;XU Man;LIU Hai-long;YANG Ai-xue;WEI Wen-guo;WU Zai-zhong;AN Meng-ying(The Fifth Geoiogical Brigade of Hebei Bureau of Geology and Mineral Resources(Heibei Marine Geological Environment Survey),Tangshan 063000,China)

机构地区：[1]河北省地质矿产勘查开发局第五地质大队(河北省海洋地质环境调查中心),河北唐山063000

出　　处：《河北地质大学学报》2023年第4期29-38,共10页Journal of Hebei Geo University

基　　金：河北地质矿产勘查开发局科研项目(13000022P00329410103R);河北科技厅重点研发项目(22374201D);河北地质矿产勘查开发局科研项目(13000022P0069B410037Y)。

摘　　要：冀东地区有多个大中型金矿床分布在冀东幔枝构造的核部、盖层及火山-沉积盆地中,找矿潜力优越。对冀东幔枝构造各个单元及其地质特征综合分析得出,冀东幔枝构造以核部及盖层为主体,这2个次级单元内部分布着冀东地区90%以上的侵入体。其中核部东西向串珠状等间距分布的岩体周边已发现大量的金矿点,具有得天独厚的成矿条件。对该区金矿床类型及其地质特征综合分析得出,冀东幔枝构造次级单元中金矿类型有所不同,成矿地质条件也有所差异。通过大数据分析及成矿地质条件研究,提出了区域性断裂附近10 km内是最佳的找金区间,该区间具有矿源、通道和储集“三位一体”的成矿条件。There are many large and medium-sized gold deposits distributed in the core,cover and volcanic sedimentary basin of the mantle branch structure in Eastern Hebei,with superior prospecting potential.According to the comprehensive analysis of each unit of the mantle branch structure in Eastern Hebei and its geological characteristics,the mantle branch structure in Eastern Hebei is dominated by the core and cover,and more than 90%of the intrusions in Eastern Hebei are distributed in these two sub units.Among them,a large number of gold mine have been found around the east-west beaded equidistant rock mass in the core,which has good metallogenic conditions.Based on the comprehensive analysis of the gold deposit types and geological characteristics in this area,it is concluded that the gold deposit types in the sub units of the mantle branch structure in Eastern Hebei are different,and the metallogenic geological conditions are also different.Based on the analysis of big data and the study of ore-forming geological conditions,it is proposed that the 10 km area near the regional fault is the best gold prospecting area,which has the ore-forming conditions of"trinity"of ore source,channel and reservoir.

关 键 词：冀东 幔枝构造 金矿 岩体 地质特征 成矿规律 

分 类 号：P612[天文地球—矿床学]