摘要
土壤地球化学测量工作对发现土壤中与成矿有关的地球化学异常进而对指导找矿具有重要的意义.内蒙古白音诺尔铅锌矿床是我国北方一个典型的矽卡岩型矿床,具有大而富的特点.选取内蒙古白音诺尔铅锌矿区某已开采矿体上方6号土壤垂直剖面、以及距离6号剖面分别约1.0km和4.5km的非矿土壤垂直剖面3和8,垂向上通过每隔10cm取样,进行了系统的土壤磁化率测试和与成矿有关的部分微量元素的总量测试分析.结果显示,尽管近矿剖面6和远矿剖面3中磁化率与土壤深度之间呈良好的负相关关系,但剖面6中9种元素含量均显示"顶底低中间高"的"倒C型"分布,而远矿剖面3和8中元素含量多呈动荡波动.这些研究思路与结论可为覆盖区表生土壤地球化学测量及矿产预测研究提供借鉴,对系统模拟和研究地球化学组分在矿区及周边残积土剖面中的迁移演化规律及其影响因素亦具有指示意义.
Geochemical soil survey is of great significance to find the geochemical soil anomalies related to ore deposits.Baiyinnuoer lead-zinc deposit in Inner Mongolia is one typical Skarn deposit in North China and detailed geological mining survey had been done in this area to prospect ore-bodies.In this study,3typical vertical soil profiles had been sampled to study the geochemical vertical transportation modes and then to further explore new ideas for mineral resource prospecting.Soil profile 6was collected upon one Pb-Zn ore-body.Profile 3and Profile 8were 1km and 4.5km away from Profile 6,respectively.Along Profile 6and Profile 3,soil magnetic susceptibility values decrease significantly with the depth of the soil samples increasing.The distribution patterns of all the 9geochemical elements along Profile 6display a similar trend which shows the concentrations are lower in both topsoil layer and half-weathered rock layer,but higher in residual subsoil layer,showing as＂C-shape＂,which are quite different from those patterns for profile 3and profile 8,since the element concentration values do fluctuate violently without a similar trend as shown in Profile 6.The research approach and results of this paper could be useful references for evaluating mineral resources in covered areas from the surface geochemical soil surveys and it also could provide new avenues for detecting the geochemical mechanisms for vertical transportation.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2012年第6期1140-1148,共9页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金(No.40972205)
中国地调局项目(Nos.1212010633910
1212011121101)
"863"项目(No.2009AA06Z110)
关键词
覆盖区
白音诺尔矿区
土壤剖面
磁化率
元素纵向迁移
成矿预测
矿床
covered area
Baiyinnuoer Pb-Zn deposit area
soil profile
magnetic susceptibility
elemental vertical transportation
ore prospecting
ore deposits
