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首页> 外文期刊>Geochemistry: exploration, environment, analysis >Vertical distribution of major ore-forming elements and the speciation in the semiarid system above the concealed Baiyinnuoer Pb-Zn deposit in inner Mongolia, China
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Vertical distribution of major ore-forming elements and the speciation in the semiarid system above the concealed Baiyinnuoer Pb-Zn deposit in inner Mongolia, China

机译：主要矿石成形元素的垂直分布及在中国内蒙古隐藏的白素诺矿床上以上的半干旱系统的形态

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The concealed (80 m) Baiyinnuoer Pb-Zn deposit in Inner Mongolia is atypical skarn deposit in North China and has been studied to improve geochemical exploration within the area. Two vertical soil profiles were studied in order to evaluate the vertical geochemical distribution patterns within the residual soil associated with this deposit. Soil Profile #6 is located above the Pb-Zn orebody whereas Profile #8 is located away from this deposit. To determine the dynamics of the vertical geochemical distribution patterns, concentrations and species of nine elements in samples of six different size fractions were used. The distribution patterns of all the nine elements along Profile #6 display a similar trend of lower concentrations in both the topsoil and moderately-weathered bedrock layers but higher concentrations in the residual subsoil layer, showing an inverted 1 C-shape'. The normalized concentrations (using Fe) of elements and the normalized enrichment factors also follow the same distribution patterns. A sequential extraction study of the soil showed that ore-forming and pathfinder elements were dominantly related to humic acid, Fe-Mn oxides and residual fractions. Based on the results, the recommended soil sampling depth for detecting surficial geochemical anomalies in this and similar semi-arid and thickly covered area is 2-3 m. Furthermore, Hg, Sb, As, Cu, Pb, Zn, Mn and Bi appear to be important indicators for geochemical exploration of Pb-Zn deposits. The research approach and results of this study are useful for evaluating mineral resources in similar covered areas through surface geochemical soil surveys as well as for providing insights to the dynamics of vertical geochemical patterns in soil from concealed Pb-Zn deposits.
机译：内蒙古的隐藏（＆ 80米）白细胞尼尔PB-Zn矿床是华北地区的非典型矽卡岩矿床，并已研究在该地区内提高地球化学勘探。研究了两个垂直的土壤曲线，以评估与该矿床相关的残留土中的垂直地球化学分布模式。土壤剖面＃6位于PB-Zn Orebody之上，而配置文件＃8则远离该沉积物。为了确定垂直地球化学分布模式的动态，使用六种不同尺寸级别的样品中的浓度和九种元素。沿轮廓＃6的所有九个元素的分布模式显示了表土和中度风化的基岩层中的较低浓度的相似趋势，但在残留的底层层中浓度较高，显示出倒置的1 c形。元素的归一化浓度（使用Fe）和归一化的富集因子也遵循相同的分布模式。土壤的连续提取研究表明，矿石和探测物元素与腐殖酸，Fe-Mn氧化物和残留级分具有显着相关。基于结果，用于检测该表格地球化学异常的推荐土壤采样深度和类似的半干旱和厚覆盖面积为2-3米。此外，Hg，Sb，Cu，Pb，Zn，Mn和Bi似乎是Pb-Zn沉积物的地球化学勘探的重要指标。该研究的研究方法和结果可用于通过表面地球化学土壤调查评估类似覆盖区域中的矿产资源以及对隐藏的PB-ZN沉积物的土壤中垂直地球化学模式的动态进行了解。

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