内蒙古野狼沟锌多金属矿床地球化学异常特征及找矿意义  

GEOCHEMICAL ANOMALY CHARACTERISTICS OF THE YELANGGOU ZINC POLYMETALLIC DEPOSIT IN INNER MONGOLIA AND THEIR PROSPECTING SIGNIFICANCE

作　　者：康明[1] 朱文德[1] 晋京[1] 崔来旺[2] 廖蕾[2] 苏宏伟[2] 刘还林[2] 杨崇文 

机构地区：[1]长安大学地球科学与资源学院成矿作用及其动力学开放实验室,陕西西安710054 [2]内蒙古自治区地质调查院,内蒙古呼和浩特010020 [3]内蒙古自治区第八地质矿产勘查开发院,内蒙古呼和浩特016000

出　　处：《物探与化探》2011年第5期588-591,596,共5页Geophysical and Geochemical Exploration

基　　金：内蒙古自治区地质矿产综合研究项目(05-2-KD11)

摘　　要：运用1∶5万水系沉积物测量方法,在野狼沟圈出Ag、Mo、Zn、W、As、Sb、Bi、Au、Cu等组合异常,其中Ag、Mo、Zn、W、As、Sb异常峰值较高,吻合程度较好,有一定连续性。该组合异常受断裂、褶皱构造复合控制明显,尤以断裂构造蚀变带的发育为特征,在构造蚀变带部位,成矿元素异常峰值较高。指示元素岩石地球化学异常面积不大,但成矿元素强度高。在野狼沟地区,主成矿元素Zn的Zn11原生晕面积约0.11 km2,Zn含量几何平均值为1 368.51×10-6,有3个连续样品中w(Zn)>3 000×10-6,为矿致异常。Zn、Ag、As指示元素在矿带上形成较大规模和连续性较好的原生地球化学异常,对成矿成晕研究和主成矿金属元素远景预测很有意义。Through 1： 50 000 stream sediment survey, muhi-element anomalies were delineated in Yelanggou, which included Ag, Mo, W, Zn, Bi, As, Sb, Au, Cu etc. Of all these elements, Ag, Mo, Zn, W, As and Sb anomalies have high peaks, high values and continuity. The mixed anomalies are controlled obviously by faults and folds, characterized especially by high values in well devel- oped fault tectonic alteration zone. Areas of lithogeochemical anomalies of indicator elements are not large ; nevertheless, the intensity of principal ore-forming element Zn is high, as shown by Znl 1 primary halo. The area of Znl 1 primary halo is 0. 11 km2, the geometric mean is 1 368.51×10-6, and data of three continuous samples are all above 3 000 ×10-6 , so this primary halo is identified as an anomaly related to mineralization. Zn, Ag and As primary halos have larger sizes and are more continuous around the mineralization district than in other places of the study area. All these results are really important for the study of ore-forming process and prospecting work.

关 键 词：锌多金属矿 构造蚀变带 水系沉积物异常 内蒙古野狼沟 

分 类 号：P632[天文地球—地质矿产勘探]