3
The Chicama-Yanacocha Structural Corridor corre-
sponds to a 30 to 40 km wide and at least 200 km long
strip that begins at the Chicama River and port and extends
in a N 40° E direction, passing through Guzmango and
Contumazá, Cajamarca, La Encañada, Yanacocha and
Hualgayoc, extending even further to the West. It con-
tains faults that are transversal to the Andean trend (trans-
Andean), magmatic events aligned in the same direction,
as well as hydrothermal alteration phenomena and metallic
mineralization (Chira et al., 2007).
MATERIALS AND METHODS
Satellite Data
The satellite remote sensing data employed in this investi-
gation comprised ASTER multispectral data. ASTER, an
integral component of the Terra platform within the Earth
Observing System (EOS), encompasses three distinct sub-
systems, collectively yielding 14 bands of data (Hiroyuki,
1995, cited in Geng Zhang et al., 2024). ASTER data
including three VNIR (visible near-infrared: spatial resolu-
tion: 15 m) bands (0.520–0.860 µm), six SWIR (short-
wave infrared spatial resolution: 30 m) bands (1.600–2.430
µm) and five TIR (thermal infrared spatial resolution 90
m) bands (8.125–11.65 µm). The ASTER data covers 60 ×
60 km2 making it effective for geological and mineral map-
ping at the local level (Safianou et al., 2024).
The ASTER image utilized in this study suited for the
extraction of mineralization information within this spe-
cific area.
Methodology
The research process was carried out in three stages, as
shown in Figure 3.
Regarding the methodology used to determine areas
with hydrothermal alteration minerals, it consists of five
general processes such as: 1. Obtaining the satellite image
of the study area 2. Pre-processing of the satellite image 3.
Processing of the satellite image with the Envi 5.6 software
4. Comparison of spectral techniques and 5. Preparation
of the map with the zoning of hydrothermal alterations
(Figure 4).
ALTERATION MINERAL MAPPING
SPECTRAL TECHNIQUES
In the present research project, four spectral techniques
were applied to estimate areas with hydrothermal alteration
and their respective mineralogical assemblages. It is worth
mentioning that with each technique used, new areas of
interest were identified.
Figure 2. Regional structural geological sketch map
The Chicama-Yanacocha Structural Corridor corre-
sponds to a 30 to 40 km wide and at least 200 km long
strip that begins at the Chicama River and port and extends
in a N 40° E direction, passing through Guzmango and
Contumazá, Cajamarca, La Encañada, Yanacocha and
Hualgayoc, extending even further to the West. It con-
tains faults that are transversal to the Andean trend (trans-
Andean), magmatic events aligned in the same direction,
as well as hydrothermal alteration phenomena and metallic
mineralization (Chira et al., 2007).
MATERIALS AND METHODS
Satellite Data
The satellite remote sensing data employed in this investi-
gation comprised ASTER multispectral data. ASTER, an
integral component of the Terra platform within the Earth
Observing System (EOS), encompasses three distinct sub-
systems, collectively yielding 14 bands of data (Hiroyuki,
1995, cited in Geng Zhang et al., 2024). ASTER data
including three VNIR (visible near-infrared: spatial resolu-
tion: 15 m) bands (0.520–0.860 µm), six SWIR (short-
wave infrared spatial resolution: 30 m) bands (1.600–2.430
µm) and five TIR (thermal infrared spatial resolution 90
m) bands (8.125–11.65 µm). The ASTER data covers 60 ×
60 km2 making it effective for geological and mineral map-
ping at the local level (Safianou et al., 2024).
The ASTER image utilized in this study suited for the
extraction of mineralization information within this spe-
cific area.
Methodology
The research process was carried out in three stages, as
shown in Figure 3.
Regarding the methodology used to determine areas
with hydrothermal alteration minerals, it consists of five
general processes such as: 1. Obtaining the satellite image
of the study area 2. Pre-processing of the satellite image 3.
Processing of the satellite image with the Envi 5.6 software
4. Comparison of spectral techniques and 5. Preparation
of the map with the zoning of hydrothermal alterations
(Figure 4).
ALTERATION MINERAL MAPPING
SPECTRAL TECHNIQUES
In the present research project, four spectral techniques
were applied to estimate areas with hydrothermal alteration
and their respective mineralogical assemblages. It is worth
mentioning that with each technique used, new areas of
interest were identified.
Figure 2. Regional structural geological sketch map