大兴安岭南段锡多金属成矿系列  

TIN-POLYMETALLIC METALLOGENIC SERIES IN THE SOUTHERN PART OF DA HINGGAN MOUNTAINS,CHINA

作　　者：王京彬[1] 王玉往[1] 王莉娟[1] 

机构地区：[1]北京矿产地质研究院,北京100012

出　　处：《地质与勘探》2005年第6期15-20,共6页Geology and Exploration

基　　金：国家自然科学基金(编号:40273021);中日合作项目"中国矿物资源探查研究中心"联合资助

摘　　要：大兴安岭南段是我国北方最重要的锡-多金属成矿集中区.根据成矿花岗岩和成矿元素组合的不同,可分为3个成矿系列:锡(钨)成矿系列(Sn-W-Nb-Ta-Be)、锡-多金属系列(Sn-Ag-Cu-Pb-Zn)和含锡的多金属系列(Pb-Zn-Cu-Ag),3个系列的成矿时代相同(130～150Ma),均与大兴安岭南段燕山期花岗质岩浆作用有关.与锡(钨)成矿系列有关的花岗岩,主要是钾长花岗岩-花岗斑岩,具有钛铁矿系列花岗岩的特征;与含锡的多金属系列有关的花岗岩,主要是花岗闪长岩-石英二长岩类,具有I型或磁铁矿系列花岗岩的特征;而当钾长花岗岩类与花岗闪长岩-二长斑岩等构成花岗质杂岩体或定位在相近空间时,常形成锡-多金属共生组合.研究表明,锡-多金属系列是与含锡的钛铁矿系列和含多金属的磁铁矿系列两种不同花岗岩类有关的含矿热液同位叠加成矿的结果.高成熟度、富锡的锡林浩特元古宙变质岩的重融-分异演化,可能是形成大兴安岭南段锡富集的主要原因.The southern part of Da Hinggan mountains is the most important tin-polymetallic concentration area in the Northern China. Based on oreforming element assemblages, three metallogenic series like Sn（W） -, paragenetic Sn-polymetallic-and polymetallic-series, are recognized. Sn （W）-series, consisting of greisen , skarn and vein types, is associated with ilmenite-series, potassic feldspar （Kf） granites. Polymetallic Pb-Zn-Cu series with porphyry, skarn and vein types, is related to magnetite-series, granodiorite-monzonite. While paragenetic tin-polymetallic mineralization is associated with the coexisting of Kf- granite and granodiorite-monzonite, it is suggested that the paragenetic tin-polymetallic series is caused by the superimposed mineralization with tin from ilmenite-series magma and polymetallic elements from magnetite - series magmatic-hydrothermal system. All the three series possess similar metallogenic age, concentrating in J3-K1 （ 130-150Ma）. The melting of high maturity and tin-rich Xilinhot Proterozoic complex （ micro-massif） during Mesozoic period, could generate the ilmenite-series, tin-bearing felsic magma, and cause tin mineralization in the southern part of Da Hinggan mountains.

关 键 词：大兴安岭 锡矿床 多金属矿床 成矿系列 燕山期花岗岩 

分 类 号：P618.44[天文地球—矿床学]