CHARACTERISTICSOFSECONDARYHALOSANDDISPERSIONPATTERNS OFAUINAFRICANTROPICALGRASSLANDLANDSCAPE
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摘要: 乍得共和国Mayokebbi省Pala地区是该国最重要的砂金矿区,多家公司先后致力于在该区域寻找岩金,然而经过大量的槽探工程施工与钻孔验证,均未发现好的矿体。为了解释地表Au异常的形成过程及原因,笔者在Pala地区针对金矿开展了地球化学勘查,对热带草原景观区Au的次生晕特征进行了讨论与总结,通过土壤垂直剖面测量分析了Au在准平原化过程中的地球化学行为,并最终解释了该区域金异常的成因。本次研究对国内企业赴非洲相同景观条件下进行金矿勘查具有指导意义。Abstract: ThePalaareaisthemostimportantminingareaforalluvialgoldinMayoKebbiRegion,Chad.Manycompaniestriedtofind rockgoldinthisarea;nevertheless,theyallfailedtofindanygoodorebodiesinspiteoflotsoftrenchinganddrillingwork.Toillus-tratetheformationprocessandoriginofgoldanomalies,theauthorsconductedgeochemicalexplorationofgoldminesinPalawiththe purposeofsummingupthecharacteristicsofsecondaryhalosofAuinAfricantropicalgrasslandlandscape.Verticalsoilprofilemeas-urementwasalsomadetoanalyzethegeochemicalbehaviorofAuduringpediplanationsoastoexplaintheoriginofgoldanomalies. TheresultsobtainedbytheauthorsareofdirectivesignificanceforgoldexplorationworkofChina'scompaniesinAfricaunderthesame landscapecondition.
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Key words:
- alluvialgold /
- soilgeochemicalsurvey /
- anomalyinspection /
- pediplanation /
- Chad
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