摘要
伊东林场金银矿床位于小兴安岭—张广才岭岩浆弧,矿体产于下白垩统板子房组火山岩内。矿区内已发现26条矿体,规模最大的为Ⅰ5金矿体,呈不规则脉状分布,走向NE60°~70°,倾向330°~340°,倾角70°~75°,总体向南西侧伏,矿石类型为含金石英脉型。成矿期可划分为5个矿化阶段,其中灰色金属硫化物硅质阶段为主要矿化阶段。在总结矿床地质特征的基础上,分析了控矿因素,认为矿床成因类型为与陆相火山—次火山岩有关的热液型金银矿,石英脉和硅化蚀变带为该区最直接的找矿标志,低磁低阻高极化背景中高阻低极化异常、高强度金异常为重要的物化探找矿标志。
Yidonglinchang Au-Ag deposit is located at the magma arc of Xiaoxing'an Mountains and Zhangguangcai Mountains,which is hosted within the volcanic rocks of the Lower Cretaceous Banzifang Formation.Twenty-six gold orebodies have been discovered in the mining area.The largest one is I 5 gold orebody,which is distributed in irregular veins,striking in NE60°-70°,inclining to NW330°-340°with a dip angle of 70°-75°.The ore type is gold-bearing quartz vein,which is generally lateral to the southwest.The mineralization period can be divided into five metallogenic stages,and the gray metal sulfide siliceous one is the main metallogenic stage.Based on the geological characteristics analysis of Yidonglinchang Au-Ag deposit,it is considered that the deposit genesis type is hydrothermal gold silver deposit related to continental volcanic-subvolcanic rocks.Quartz vein and silicified alteration zone are the most direct prospecting indicators in this area,and the high resistivity and low polarizability anomalies in the background of weak magnetic and low resistivity and high polarizability,and high gold geochemical anomalies are the important geophysical and geochemical prospecting indicators.
作者
王兴
刘旭光
万太平
李德胜
苏永强
唐伟
WANG Xing;LIU Xuguang;WAN Taiping;LI Desheng;SU Yongqiang;TANG Wei(Heilongjiang Institute of Natural Resources Survey,Haerbin 150036,Heilongjiang,China;Heilongjiang Mining Group Co.,Ltd.,Haerbin 150036,Heilongjiang,China)
出处
《矿产与地质》
2023年第3期455-462,共8页
Mineral Resources and Geology
基金
黑龙江省矿产勘查专项基金项目(编号:KCZX-SDKC-2017032)资助。
关键词
金银矿
矿床地质特征
成矿阶段
找矿标志
黑龙江伊春
Yidonglinchang gold silver deposit
deposit geological characteristics
metallogenic stage
prospecting indicator
Yichun City of Heilongjiang
