2010•Resources Environment & EngineeringRequires access
Geological Characteristics and Deposit Genesis of Zinc Polymetallic Deposit of Xiaochengzi Ore Section in Xiaobeigou Ore District,Inner Mongolia Province
Wang Yanxia
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Abstract
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.