吉林省桦甸市二道林子铜砷多金属矿床特征及矿床成因浅析

Analysis of the characteristics and genesis of Erdaolinzi copper arsenic polymetallic deposits in Huadian City,Jilin Province

二道林子铜砷多金属矿床属高中温热液脉状铜及多金属矿床,是以铜、铅、锌、砷成矿元素为主的相互共生和伴生矿床。矿床规模为中型,处于大顶子—横道河子多金属成矿带的东南部。矿床含矿热液流体沿着北东向断裂上侵,具有多期脉动式形成特点。矿床矿体多赋存在二叠系范家屯组泥质板岩、砂质板岩及变质砂岩中。矿体主要受硅化蚀变体和层间裂隙控制,少数分布在矽卡岩中。矿床深部和外围找矿潜力巨大。

The Erdaolinzi copper arsenic polymetallic deposit belongs to the high-temperature hydrothermal vein copper and polymetallic deposit,which is mainly a symbiotic and associated deposit composed of copper,lead,zinc,and arsenic ore-forming elements.The scale of the deposit is medium-sized and located in the southeast of the Dadingzi Hengdaohezi polymetallic mineralization belt.The ore bearing hydrothermal fluid of the deposit intrudes upwards along the northeast trending fault,exhibiting the characteristics of multi-stage pulsating formation.The ore bodies of the deposit are mostly hosted in the muddy slate,sandy slate,and metamorphic sandstone of the Fanjiatun Formation in the Permian.The ore body is mainly controlled by silicified alteration variants and interlayer fractures,with a few distributed in skarn.The deep and peripheral exploration potential of the deposit is enormous.