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锡铁山北西铅锌矿区位于柴达木地块北缘古生代裂谷带的中基性火山-沉积岩系中,成矿和改造的地质过程与柴达木地块周边地质演化有密切关系。全区地层(Pt1dk-O3tn-D-C)总体富集Cu、Pb、Zn、Ag、Au、As、Sn、Bi、Mn,反映该区是一个Cu、Pb、Zn、Ag、Au高背景区。通过岩石地球化学测量,显示出本区Au、Ba元素贫化,As、Hg强富集,Cu、Ag富集,为高背景区。Zn、Pb、Mn、Sb略富集,Pb、As元素变化数系大,Ba、Sb、Ag变化较大,存在较强分异性,矿化活动较强烈。元素组合异常自北东依次可划分为六个组合异常,显示出该区紧邻锡铁山主矿区较好的找矿前景,远离主矿带的西部区域,成矿环境和异常显示较弱。
The North West lead-zinc mine of Xieshan is located in the Mesozoic volcanic-sedimentary rock series in the Paleozoic rift zone on the northern margin of the Qaidam block. The geological process of mineralization and alteration is closely related to the geological evolution around the Qaidam block. Pb, Zn, Ag, Au, As, Sn, Bi and Mn are all enriched in the whole area (Pt1dk-O3tn-D-C), indicating that this area is a high background area of Cu, Pb, Zn, Ag and Au. Through the lithogeochemical measurements, it is shown that the Au, Ba elements are depleted, As, Hg are strongly enriched, Cu, Ag are enriched, and are high background areas. Zn, Pb, Mn and Sb are slightly enriched, and the variation of Pb and As elements is large, and the variation of Ba, Sb and Ag is relatively large with strong differentiation and strong mineralization activity. The anomaly of elemental assemblage can be divided into six anomalies in turn from the North East. The results show that the area is close to the prospecting prospect of the Xiantingshan main ore district, and away from the western area of the main ore belt, the ore-forming environment and anomaly show weakness.