【摘要】 青海省海西地区是中国西北一个非常重要的金属及非金属成矿区。也日更金铜镍多金属矿床周边古老变质岩系发育,华里西期、印支期构造岩浆活动频繁并且强度大,构造作用较复杂,近EW向和NWW向断裂构造及受其控制的中酸性脉岩发育,围岩蚀变现象明显,局部地段显示了较为明显的金、铜、镍等多金属矿化,同时有1∶50000及1∶25000化探综合异常显示,1∶5000地物化剖面异常清晰,最后通过探槽工程揭露,显示出该区具有较好的成矿远景。更多还原

【Abstract】 Haixi area of Qinghai is a very important metallic and non-metallic mineralization area in the northwest of China.Old metamorphic series are widely developed in Yerigeng Au-Cu-Ni polymetallic ore field and surrounding area.It corresponds frequent and intense magmatic activity,complex structures in Variscan and Indosinian period.The nearly EW-trending faults and NWW-trending faults structure and intermediate-acidic vein rocks which are controlled by the fault structure are well developed.The phenomenon of wall rock alterrtion is obvious,and Au-Cu-Ni polymetallic mineralization is obvious locally.Geochemical prospecting works at 1 ∶ 50,000 and 1 Haixi area of Qinghai is a very important metallic and non-metallic mineralization area in the northwest of China.Old metamorphic series are widely developed in Yerigeng Au-Cu-Ni polymetallic ore field and surrounding area.It corresponds frequent and intense magmatic activity,complex structures in Variscan and Indosinian period.The nearly EW-trending faults and NWW-trending faults structure and intermediate-acidic vein rocks which are controlled by the fault structure are well developed.The phenomenon of wall rock alterrtion is obvious,and Au-Cu-Ni polymetallic mineralization is obvious locally.Geochemical prospecting works at 1 ∶ 50,000 and 1 ∶ 25,000 scale shows clear anomalies,and composite geophysical and geochemical prospecting section at 1 ∶ 5,000 shows clear anomalies.At last,the obvious mineralization parts are revealed through exploratory trenching.It appears that area has favorable metallogenic prospect.25,000 scale shows clear anomalies,and composite geophysical and geochemical prospecting section at 1 ∶ 5,000 shows clear anomalies.At last,the obvious mineralization parts are revealed through exploratory trenching.It appears that area has favorable metallogenic prospect.更多还原