湘南香花岭锡多金属矿田地质地球化学特征及成因探讨

Discussion on the Genesis and Geological-geochemical Characteristics of the Xianghuanling Tin-polymetallic Orefield in the South of Hunan Province

香花岭锡多金属矿田位于华南褶皱系中部、湘南成矿带的西南缘。对香花岭锡多金属矿田地层成矿元素和岩浆岩微量元素、成矿元素、稀碱元素、挥发元素、稀土元素地球化学特征及硫、铅、碳、氧同位素地球化学特征的研究表明:矿田内主要矿化、蚀变均围绕花岗岩体产出,含矿热液主要来自壳幔混合岩浆结晶分异成岩期后产生的流体,在流体运移演化过程中有围岩成矿物质和地下水加入,岩浆热液矿化作用过程是在一个有围岩物质、地下水不断加入的开放体系中完成的。香花岭锡多金属矿田在成因上属与燕山期岩浆活动有关的岩浆热液型锡多金属成矿系列。

Xianghualing polymetallic tin orefield is Located in the middle of the South China fold belt,south-western part of Hunan metallogenic belt.Based on the study of tin-polymetalic ore-host strata,trace elements,ore-forming elements,dilute alkali elements,volatile elements,rare earth elements in the granite and S,Pb,C,O Geological characters,it is suggested that the metallization and alteration are produced around the granite.The ore-bearing hydrothermal are mainly from the fluid,which is produced in the late diagenetic stage of the crust-mantle mixing crystallization fractionation with the country rock and underground water entering in a open system.According to the genesis of metallogenic,the Xianghualing tin-polymetallic orefield belongs to the series of magmatic hydrothermal tin-polymetallic which is related to the Yanshan Period.