对山西省胡家峪桐木沟铜矿床3号主矿体定位规律及深部原生晕特征进行研究.结果表明:3号主矿体赋存于篦子沟组硅化大理岩与碳质板岩接触带上,倾向SE,向NE侧伏.篦子沟组层内剥离断层作为控矿构造为成矿流体的运移及矿质卸载提供空间,控矿断裂面沿倾向方向由缓到陡的部位易于成矿.目前开拓的525 m～445 m中段正处在断裂面产状变缓部位,向深部断裂面产状有变陡的可能；其矿体原生晕轴向分带序列为(Sn -W-Sb) - (Mn-V-B-As-Ni) -( Pb-Ti-Ag-Co-Mo-Bi-Zn-Hg-Cu-Au).地球化学参数a总体表现为“升”,前缘晕元素的分布向下富集,原生晕特征显示3号矿体向下部还有延伸,并据此圈定出深部矿体的预测靶区.445 m中段出现Cu、Mo矿化叠加现象,且发现强烈绢英岩化的斑状花岗闪长岩,推测深部可能存在斑岩型Cu、Mo矿化,深部前缘晕元素富集是含Mo热液叠加的表征,因而深部也同时作为寻找Mo矿化的远景区.%The characteristics of location rule and deep primary halo of Tongmugou copper deposit 3# ore body in Hujiayu of Shanxi Province have been studied. The results show that the ore body 3# occurs in the contact zone of silicified marble and carbonaceous slate of Bizigou Formation with southeastern inclining and northeastern lateral trending. The detachment faults within Bizigou Formation provide interspace for the movement of melallogeneic fluid and the unloading of minerals. The area from gentle to steep slope along the inclination is more favorable for mineralization, and the 525 ~445 m level is just located at the gentle area of fracture surface, and change to steep in deep; the axial zonality sequence of primary halo in 525 ~445 m can be concluded as (Sn-W-Sb) - (Mn-V-B -As-Ni) - (Pb-Ti-Ag-Co-Mo-Bi-Zn-Hg-Cu-Au). The geochemical parameter "a" performs increasing trend, the distribution of front halo element enriches in lower part, which reflects that the ore body 3# may prolong downwards to a greater extent, and delineates the forecasting target area of deep ore body based on above analysis. There exists the mineralization superposition of Cu and Mo in 445 m with sericite-quartz alteration prophyritic grano-diorite, which is the sign of prophyritic Cu and Mo mineralization in deep, and the deep front halo element enrich-ment is also a representation of Mo hydrothermal superposition. Thus, the authors propose that the deep part of 445 m level is a prospective area to find Mo mineralization.
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