electrical methods case studies. pine point mineralization, northwest territories strata-bound...
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![Page 1: Electrical methods case studies. Pine point mineralization, Northwest Territories Strata-bound sulphide deposit (lead-zinc-silver in a limestone host](https://reader035.vdocument.in/reader035/viewer/2022070409/56649e845503460f94b8595f/html5/thumbnails/1.jpg)
Electrical methods case studies
![Page 2: Electrical methods case studies. Pine point mineralization, Northwest Territories Strata-bound sulphide deposit (lead-zinc-silver in a limestone host](https://reader035.vdocument.in/reader035/viewer/2022070409/56649e845503460f94b8595f/html5/thumbnails/2.jpg)
Pine point mineralization, Northwest Territories
Strata-bound sulphide deposit (lead-zinc-silver in a limestone host rock)
Background effects in limestone are very low
Resistivity pseudo-section relatively featureless
FE and MFE sections show persistent anomaly, even at very large spacing.
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Detection of clay lens in an aquiferMap of PFE detects a clay-rich lens in a sandy gravel
Clay reduces the fluid permeability
Hence the IP survey aided in the assessment of the potential of the aquifer as a reservoir
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Disseminated porphyry copper
Relatively featureless resistivity, discovery of mineralization made on the basis of the MF pseudo-section.
Discovery is ore-grade, in spite of low grade due to copper and molybdenum.
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Disseminated sulphide
Deeper deposits inferred from psuedo-section: note large spacing required to detect MF anomaly
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Gortdrum copper-silver, IrelandLimited data (one profile only, no pseudo-section)
Chargeability anomaly well defined, centered over ore body.
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Lornex copper porphyry, British Columbia
Resistivity shows only a mild increase to the east – probably due to thinning of conductive overburden
Short spacing IP shows the mineralization, relatively low grade at the east.
Long spacing IP indicates mineralization continues at depth to the west.
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Krain sulfide deposit, British Columbia
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Model study of “inversion”
Psuedo section Inversion result, or “real” section
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Model study of “inversion”
Psuedo section Inversion result, or “real” section
![Page 11: Electrical methods case studies. Pine point mineralization, Northwest Territories Strata-bound sulphide deposit (lead-zinc-silver in a limestone host](https://reader035.vdocument.in/reader035/viewer/2022070409/56649e845503460f94b8595f/html5/thumbnails/11.jpg)
Example of “inversion”, Century deposit, Australia
Pseudo-section
Inversion result, with interpretation
Predicted IP data
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Dam leakage, Mexico