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现代地质 ›› 2023, Vol. 37 ›› Issue (06): 1553-1566.DOI: 10.19657/j.geoscience.1000-8527.2023.048

• 矿床学与区域成矿学 • 上一篇    下一篇

广西崇左市那渠地区土壤地球化学特征及找矿前景

罗海怡1,2(), 罗先熔1(), 刘攀峰1, 马明亮2, 陆显盛2, 蒋小明2, 鲍官桂2, 蒋羽雄1   

  1. 1.桂林理工大学地球科学学院隐伏矿床预测研究所,广西 桂林 541004
    2.广西壮族自治区三○五核地质大队,广西 柳州 545005
  • 收稿日期:2022-09-15 修回日期:2023-05-26 出版日期:2023-12-10 发布日期:2024-01-24
  • 通讯作者: 罗先熔,男,教授,博士生导师,1953年出生,地球化学专业,主要从事地质与地球化学研究工作。Email:lxr811@glut.edu.cn
  • 作者简介:罗海怡,男,硕士研究生,1994年出生,地球化学专业,从事地质及环境地球化学研究工作。Email:874436135@qq.com
  • 基金资助:
    广西科技计划项目(2022DXNSFBA035548);广西科技计划项目(2021JJA150037);桂林理工大学科研启动基金项目(GUTQDJJ2019166)

Soil Geochemical Characteristics in the Naqu Area,Chongzuo City, Guangxi,and Their Mineral Prospecting Applications

LUO Haiyi1,2(), LUO Xianrong1(), LIU Panfeng1, MA Mingliang2, LU Xiansheng2, JIANG Xiaoming2, BAO Guangui2, JIANG Yuxiong1   

  1. 1. School of Geoscience,Institute of Concealed Deposit Prediction,Guilin University of Technology,Guilin,Guangxi 541004,China
    2. 305 Nuclear Geological Brigade of Guangxi Zhuang Autonomous Region,Liuzhou,Guangxi 545005,China
  • Received:2022-09-15 Revised:2023-05-26 Online:2023-12-10 Published:2024-01-24

摘要:

广西那渠地区铀成矿潜力巨大,与铀共生的钼矿也达到可综合利用的程度。然而目前该区钼矿系统的勘查工作依然缺乏,致使钼矿的找矿勘查依据不足。为了优选那渠地区钼矿找矿靶区,在该区开展了1:10000土壤地球化学测量工作。系统采集了3295件土壤样品,分析了土壤中Au、Ag、As、Bi、Hg、W、Mo、Cu、V和Ti共10 种元素的含量。多元统计分析显示Mo是该地区主成矿元素之一。运用统计学软件SPSS 22对原始数据进行R型聚类分析和R型因子分析,划分出Ag-Cu-V、Bi-Ti-W、As-Mo、Au和Hg五组成矿元素组合。采用衬度异常法计算各元素和元素组合的异常下限,运用Geochem Studio 3.5软件将各成矿元素组合衬度数据处理并绘制成异常图,结合地质条件共预测圈出3 个找矿靶区。对Ⅰ号找矿靶区进行探槽和钻探工程验证,发现了一个工业钼矿体,钼品位0.11%~0.15%,平均值0.112%。对Ⅱ号找矿靶区开展探槽工程验证,通过刻槽取样分析,显示钼品位均达到了矿化标准。研究结果指示那渠地区钼的成矿潜力较大。

关键词: 土壤地球化学特征, 衬度异常法, 找矿前景, 那渠地区, 广西崇左市

Abstract:

The Naqu area has significant potential for uranium mineralization,and the molybdenum ore found in association with uranium has considerable value for comprehensive utilization.However,there has been a lack of systematic exploration work on the molybdenum occurrence in this area,hampering the regional molybdenum ore prospecting.To facilitate regional molybdenum ore prospecting,we conducted a 1:10,000 soil geochemical survey.In the survey,we systematic collected 3,295 soil samples,which were analyzed for 10 elements,including Au,Ag,As,Bi,Hg,W,Mo,Cu,V,and Ti.Multi-variant analysis indicates that Mo is a significant ore-forming element in the study area.The original data were conducted to R-type cluster analysis and R-type factor analysis using the SPSS 22 statistical software.The results yield five ore-forming element assemblages: Ag-Cu-V,Bi-Ti-W,As-Mo,Au,and Hg.The contrast anomaly method was utilized to determine the anomalous lower limit of each individual element and their assemblage.Subsequently,the contrast data of each ore-forming element assemblage were processed with the Geochem Studio 3.5 software,which created an anomaly map.Basing on the geological conditions,we proposed three potential prospecting targets,which were then delineated for further investigation.Engineering verification was conducted on the No.1 target through trenching and drilling,revealing the presence of an industrial-grade molybdenum deposit with a Mo grade of 0.11%-0.15%(average 0.112%).Verification of trench engineering was performed in the No.2 target,and analysis of sampled trenches indicates the presence of mineralized molybdenum grade.These findings point to a substantial molybdenum mineralization potential in the Naqu region.

Key words: soil geochemical characteristics, lining value anomaly method, prospecting potential, Naqu area, Chongzuo city of Guangxi

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