内蒙古小北沟矿区小城子矿段锌多金属矿床地质特征及矿床成因  

Geological Characteristics and Deposit Genesis of Zinc Polymetallic Deposit of Xiaochengzi Ore Section in Xiaobeigou Ore District,Inner Mongolia Province

作　　者：王艳霞 

机构地区：[1]河南省有色工程勘察有限公司,河南郑州450016

出　　处：《资源环境与工程》2010年第3期228-232,共5页Resources Environment & Engineering

摘　　要：矿区处于兴蒙华力西地槽褶皱系南兴安晚华力西地槽褶皱带中部,林西隆起东缘与大板—天山凹陷毗邻部位。阐述小北沟小城子矿段锌多金属矿床地质特征,分析矿床成因,认为该矿床成矿物质主要来源于区内与次火山岩同源的深部中基性—中酸性复合岩浆,这些岩浆在浅源岩浆房中同化混杂,间歇性喷发、分异演化,使含Cu、Pb、Zn、Sn、Ag元素的成矿溶液沿林西组地层裂隙及层间构造贯入形成矿体。矿床形成温度140-370℃,成矿具有多期多阶段特点。故该矿床成因为次火山热液裂隙充填型矿床。The ore district locates in the place of eastern margin of Linxi uplift and adjoining parts of Daban-Tianshan Depression,in the middle of Late Variscan Nanxingan geosynclinals fold belt belongs to Hinggan-Mongolian Variscan geosynclinals fold system.The author expounds geological characteristics of zinc polymetallic deposit,analyzes deposit genesis,reveals deposit-forming materials mainly coming from intermediate-basic and intermediate-acid composite magma which is cognate with subvolcanic rock in the district.Magma occurs mixed assimilation,intermittent eruptions and differential evolution in the shallow magma chamber,makes ore-forming solution with Cu,Pb,Zn,Sn,Ag along Linxi formation crack and interlayer structure penetration forming ore body.Formation temperature of deposit falls within the range of 140~370 ℃ with multi-stage mineralization characteristics.So the deposit is subvolcanic-hydrothermal fissure filling deposit.

关 键 词：小北沟矿区 锌多金属 地质特征 次火山热液 

分 类 号：P618.43[天文地球—矿床学]