Geochemical exploration techniques for metals

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  • Geochemical exploration techniques for metals
    • Steam sediment survey
      • Stream sediment downstream of the source will have anomalous metal values
      • Stream sediment upstram of the source will have normal metal values
      • The size of the anomaly decreases downstream from dilution by surface water run off and sediment entering the river downsteam
      • Catastrophic dilution occurs where tributaries meet
    • Soil survey
      • Used for local follow up surveys in target areas where theres lack of outcrop
      • Taken using a systemic grid sampling strategy
      • Samples on top and down slope of the source will have anomalous values
      • Samples up slopes of the source will have a normal metal value
    • Involves collecting samples to analyse and find anomalies
      • Relies on the metals in ores undergo dispersion by weathering, erosion and transportation
      • Gives a good idea of how particular metals travel round the surface in the rock cycle
    • Samples of rock, soil, stream sediment, drill core, water and even vegetation or atmospheric gasses

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