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Remote sensing techniques for tracking changes caused by illegal gold mining in Madre de Dios, Peru

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26 sept. 2021
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Figure 1

Location of the area of interestSource: Own elaboration
Location of the area of interestSource: Own elaboration

Figure 2

The appearance of the mine site revealed on satellite images. Left: 30 August 2001 (Landsat 7 imagery); right: 24 July 2017 (Sentinel-2 imagery)Source: Own elaboration
The appearance of the mine site revealed on satellite images. Left: 30 August 2001 (Landsat 7 imagery); right: 24 July 2017 (Sentinel-2 imagery)Source: Own elaboration

Figure 3

Vegetation loss visible through the NDVI ratio. Left: 30 August 2001 (Landsat 7 imagery); right: 24 July 2017 (Sentinel-2 imagery)Source: Own elaboration
Vegetation loss visible through the NDVI ratio. Left: 30 August 2001 (Landsat 7 imagery); right: 24 July 2017 (Sentinel-2 imagery)Source: Own elaboration

Figure 4

Zoomed part of the area of interest with ferrous iron index mineral group (ferrous iron – coarse-grained ferric iron – moist soils – fire ashes) highlightedSource: Own elaboration
Zoomed part of the area of interest with ferrous iron index mineral group (ferrous iron – coarse-grained ferric iron – moist soils – fire ashes) highlightedSource: Own elaboration

Figure 5

Zoomed part of the Rio Huaypetue mine site with ferrous iron index mineral group (ferrous iron – coarse-grained ferric iron – moist soils – fire ashes) highlightedSource: Own elaboration
Zoomed part of the Rio Huaypetue mine site with ferrous iron index mineral group (ferrous iron – coarse-grained ferric iron – moist soils – fire ashes) highlightedSource: Own elaboration

Figure 6

Zoomed part of the area of interest with ferric iron index mineral group (minor ferric iron) highlightedSource: Own elaboration
Zoomed part of the area of interest with ferric iron index mineral group (minor ferric iron) highlightedSource: Own elaboration

Figure 7

Zoomed part of the area of interest with clay-sulphate-mica-marble index mineral group (minor ferric iron) highlightedSource: Own elaboration
Zoomed part of the area of interest with clay-sulphate-mica-marble index mineral group (minor ferric iron) highlightedSource: Own elaboration
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Anglais
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Sujets de la revue:
Géosciences, Géographie, Géosciences, autres