玲珑金矿田东山矿床矿体空间分带模型及应用

Orebody spatial zoning model and application of Dongshan deposit in Linglong gold ore field

根据玲珑金矿田东山矿床地表及浅部勘查工程与采矿资料,确定了成矿成晕元素种类。对成晕元素侧向分带特征和垂向分带规律的研究结果表明,矿体上盘晕元素异常组合为Cu-As-Ag,下盘晕元素异常组合为Cu-Te-As,由此确定Au/As、Au/Pb、Au/Ag、Ag/Pb比值具有成矿判别意义,即判别式Y1=0.000 5 Au/As+0.037 6 Au/Ag+0.085 7 Au/Pb-0.045 4 Ag/Pb>0.009 2时指示含矿,否则不含矿;同时建立了基于Sb/As比值和Au、Ag、As、Sb含量特征的见矿深度估计模型(H1=1.104 9+79.63k(Sb/As)×102),并对东山矿床主要矿体的可能成矿地段、见矿部位做出预测评价,提出东山矿床9号、18号、47号、50号和52号支脉在175^-70 m标高范围内赋存金矿化或工业矿体。

Based on the surface and shallow prospecting and mining data of Dongshan deposit in Linglong gold ore field,the types of ore-forming and halo-forming elements are determined.The study of the lateral zonation and the vertical zonal regulation rules of halo-forming elements indicates that the halo elements abnormity combination is Cu—As—Ag in hanging wall,while Cu—Te—As in footwall.The Au/As,Au/Pb,Au/Ag and Ag/Pb ratios significant for ore-forming discriminant,that Y1=0.000 5 Au/As＋0.037 6 Au/Ag＋0.085 7 Au/Pb-0.045 4 with Ag/Pb0.009 2 showing ore-bearing probability,indicating no ore-bearing.Meanwhile,an ore-indicating depth estimation model（H1=1.104 9＋79.63 k（Sb/As）×102）is established based on Sb/As ratio and Au,Ag,As and Sb contents.Thus,the possible ore-forming zones and ore-discovering zones of Dongshan deposite are predicted,and the authors suggested that the branch ranges 9、18、47、50 and 52 veins of the Dongshan deposit possessing gold mineralization or industrial orebody in the elevation range of 175^-70 m.