青海东昆仑那更康切尔银矿构造叠加晕模式研究与深部预测

The structural superposition halo model study and deep ore forecastfor Nagengkangqieer silver deposit in East Kunlun Mountains,Qinghai

青海省那更康切尔银矿具有多期多阶段叠加成矿成晕的特点。依托主矿体ⅡAg-3在07线不同高程构造蚀变带中取样,对210多个数据结果进行分析,研究ⅡAg-3矿体原生晕特点和不同成矿阶段形成矿体原生晕的叠加规律,得出了那更康切尔沟银矿ⅡAg-3矿体的构造叠加晕的综合特征:矿体原生晕轴(垂)向分带序列从上至下为Sb-Ag-Mn-Sn-As-Mo-Hg-W-Au-F-Bi-Zn-Pb-Cu,前缘指示元素为As、F、Hg,近矿指示元素为Pb、Zn、Ag、Sb、Cu、Au、Sn,尾晕指示元素为W、Mo、Bi、Mn。根据原生晕轴(垂)分带特点及不同阶段形成的矿体(晕)在空间上的叠加结构,建立了盲矿预测的构造叠加晕模式,确定了盲矿预测的标志。

Nagengkangqieer silver deposit in Qinghai Province is characterized by multiple phases of superposition halo and multiple ore-forming stages.Based on the samples of main orebody Ⅱ Ag-3 in the structural alteration zone of different elevations in line No.07,the analysis data of more than 210 samples are applied to study the primary halo characteristics of Ⅱ Ag-3 orebody and the superposition regularity of the primary halo formed in different metallogenic stages.The comprehensive features of structural superposition halo of Ⅱ Ag-3 orebody in Nagengkangqieer silver deposit are obtained as follows.The leading elements of the primary halo axis(vertical) zoning sequence of the orebody are,from top to bottom,Sb-Ag-Mn-Sn-As-Mo-Hg-W-Au-F-Bi-Zn-Pb-Cu.The indicating elements of leading edge are As,F,Hg.The indication elements near orebody are Pb,Zn,Ag,Sb,Cu,Au,Sn.The indicating elements of tail halo are W,Mo,Bi and Mn.According to the features of primary halo axis(vertical) zoning and the spatial superposition structure of orebodies(halos) formed in different stages,the structural superposition halo model is established for blind orebody prediction,and the mark of blind orebody prediction is determined.