摘要
为优选介拉斯台盆地草根台地区的找矿有利地段,在初步了解该区地质特征的基础上进行了1∶10000的土壤地球化学测量。对Cu、Pb、Zn、Ni、W、Mo、U、Th、Au、Ag、Sn11种微量元素的含量特征及分形特征分析显示,Mo、Ag、Pb和Zn元素为区内成矿有利元素。使用统计学软件SPSS 22对11种元素数据进行降维,划分出Ag-Pb-Zn、U-Th-W、Cu-Ni、Mo-Sn 4组元素组合,对单元素平面异常图进行套合,结合异常特征及地质成矿条件共圈定出5个预测区。成矿前景评价表明,A-1和B-2预测区是寻找Ag-Pb-Zn的重点勘查区,B-1预测区是寻找Cu多金属矿的重点勘查区,A-1预测区多金属矿床成因为热液蚀变带型,B-1预测区多金属矿床成因为火山岩型。
Based on the full understanding of the geological characteristics of the area,a 1∶10000 scale soil geochemistry survey was carried out in order to optimize the favorable areas for prospecting in Caogentai area of Kelastai basin.Some 2500 soil samples related to element characteristic parameters were obtained.The content and fractal characteristics of Cu,Pb,Zn,Ni,W,Mo,U,Th,Au,Ag,Sn micronutrient indicated that Mo,Ag,Pb and Zn are favorable elements for mineralization.The 1:10000 soil signal element anomaly of 11 elements in the study area were delineated,they are 3(Ag),3(Cu),4(Mo),4(Pb),2(U)and 3(Zn),Ag,Mo,Pb,Zn have III concentration bands.By using SPSS 22 statistical software,the data dimension of 11 kinds of elements was reduced,and four groups of element combinations of Ag-Pb-Zn,U-TH-W,Cu-Ni and Mo-Sn,were divided.The content-frequency fractal method was employed to process data of single element.The anomaly lower limits of element associations were calculated by using the cumulative frequency method.Based on the superimposition of anomaly maps of single element,element associations and the combination of element anomaly characteristics and geological ore-forming conditions,5 prediction areas were delineated.The evaluation of metallogenic prospect shows that the ore-forming potential of Mo,Ag,Pb and Zn in Caogentai area is high.Based on the ore-forming geological characteristics,it was considered that the NE-trending tectonic alteration zone is favorable for ore-forming,the late intrusive rhyolite porphyry dykes are favorable intrusions for mineralization,and the A-1 and B-2 prediction areas are the key exploration areas for Ag-Pb-Zn,and the B-1 prediction area is the key exploration area for cu-polymetallic deposits,the polymetallic deposits in the A-1 prediction area are of hydrothermal alteration belt type,and the polymetallic deposits in the B-1 prediction area are of volcanic rock type.The result shows that the soil geochemical anomaly in the soil geochemical anomaly in the area has a good indicative effect on reprospecting and is an important prospecting indicator.The prospecting effect in the exploration area has been greatly improved through the effective combination of geological investigation and soil geochemical survey.
作者
王广婷
张小勇
房冬昱
WANG Guangting;ZHANG Xiaoyong;FANG Dongyu(Research Institute No.240,CNNC,Shenyang 110135,China)
出处
《世界核地质科学》
CAS
2024年第2期321-333,共13页
World Nuclear Geoscience
基金
中国核工业地质局《内蒙古乌兰浩特市五岔沟-明水地区铀矿资源调查评价》项目(编号:202109)资助。
作者简介
第一作者:王广婷,女,1989年生,工程师,硕士,主要科研方向为铀矿勘查。E-mail:ting770707@126.com。
