摘要
为探寻呼伦贝尔市大门德力林场一带找矿依据,在该区开展了1∶50 000土壤地球化学测量。对采集的8 740件土壤样品首先进行了元素相关特征参数统计分析;然后根据不同地质背景将研究区划分为7个地质子区,并对各子区内的土壤样品分别开展元素相关特征参数统计;最后根据单元素特征圈定了单元素异常及组合异常。结果表明:(1)研究区为Cu、Pb、Zn、Mo、Bi、W等金属的重要成矿区域,上侏罗统玛尼吐组、下白垩统白音高老组为Mo、Sb的重要成矿单元,古元古界兴华渡口岩群为Pb、Cu、Bi、Mo的重要成矿单元,晚石炭世及晚侏罗世侵入岩为Pb、Bi的重要成矿单元;(2)Cu、Pb、Zn、Mo、Sb、W、Bi在各地质单元中均有一定程度的富集,是研究区内的主要成矿元素,相应的地质单元则为该元素的成矿有利找矿靶区;(3)研究区内圈定的14种1∶50 000土壤单元素异常分别为Au 19处、Ag 31处、Cu 35处、Pb 29处、Zn 19处、W 20处、Sn 27处、Mo 24处、As25处、Sb 23处、Bi 25处、Hg 26处、Co 16处、Ni 20处;(4)对研究区内圈定的各单元素异常按套合程度确定为组合异常,共圈定了1∶50 000土壤组合异常30处,其中,位于大门德力林场东北部的Ht-6组合异常由Sb、Bi、As、Ag、Cu、Pb、Mo、Sn、W等单元素异常组成,为研究区内钼矿最有利的找矿靶区。上述分析对于该区进一步开展多金属矿找矿勘探工作有一定的借鉴价值。
In order to provide the prospecting basis for Damendeli forestry station region in Hulunbeier City,1∶ 50 000 soil geochemical survey is conducted in the area. Firstly,the relative element characteristic parameters of the 8 740 soil samples are obtained by 1∶ 50 000 soil geochemical survey work; then,the study area is divided into 7 geological sub-areas based on the difference of geological background of the study area,the relative element characteristic parameters of the soil samples of each geological sub-areas are conducted statistics and analysis; finally,the single element anomalies and association anomalies are delineated. The study results show that：（1）the study area is the important metal metallogenic region of Cu,Pb,Zn,Mo,Bi and W,the Manitu Group of Upper Jurassic and Baiyingaolao Group of Lower Cretaceous are the important metallogenic unit of Mo and Bi,Xinghuadukou Group of Palaeoproterozoic is the significant metallogenic unit of Pb,Cu,Bi and Mo,the intrusive rocks of Late Carboniferous Epoch and Late Jurassic Epoch are the significant metallogenic unit of Pb and Bi;（2）elements of Cu,Pb,Zn,Mo,Sb,W and Bi have some certain degree of enrichment in the above 7 geological sub-areas,so,the elements of Cu,Pb,Zn,Mo,Sb,W and Bi can be regarded as the main metallogenic elements in the study area,the corresponding geological sub-areas are the favorable prospecting target areas of the metallogenic of each elements in the study area;（3）the 1∶ 50 000 soil signal element anomalies of 14 elements in the study area are delineated,they are 19（ Au）,31（ Ag）,35（ Cu）,29（ Pb）,19（ Zn）,20（ W）,27（ Sn）,24（ Mo）,25（ As）,23（ Sb）,25（ Bi）,26（ Hg）,16（ Co） and 20（ Ni）;（4）according to the degree of nested of single element anomalies delineated in the study area,the association anomalies are determined,so,the 30 1 ∶50 000 soil association anomalies are delineated,among them,the Ht-6 association anomaly existed in northeast part of Damendeli forestry station are composed of the single elements anomalies of Sb,Bi,As,Ag,Cu,Pb,Mo,Sn and W,it can be taken as the most favorable prospecting target area of molybdenum deposit in the study area. The above analysis results can provide some reference for the further prospecting work of polymetallic deposits in the study area.
作者
王春宇
吴经纬
王东彬
Wang Chunyu Wu Jingwei Wang Dongbin(School of Mining Engineering, Heilongjiang University of Science ＆ Technology School of Geosciences, Chengdu University of Technology)
出处
《现代矿业》
CAS
2017年第4期1-5,17,共6页
Modern Mining
基金
国家自然科学基金项目(编号:51374097)
中国博士后科学基金项目(编号:2014M561384)
关键词
土壤地球化学特征
成矿单元
单元素异常
组合异常
找矿靶区
Soil geochemical characteristics
Metallogenic unit
Single element anomaly
Association anomaly
Prospecting target area
