Context:

The upper basin of the Chaschuil river is found in the geomorphological provinces of the Cordillera Frontal and the Famatina System; it extends from the upper limit of the basin (26°45'6.35" S-68°2'22.15" O) to the Aguas Calientes volcano (27°13'25,81" S-68°19'5.48" O). The zone is inserted in the Pacific Ring of Fire, which is characterized by concentrating some of the most important subduction zones in the world, where intense seismic and volcanic activity is generated.

Method:

The volcanic geomorphological cartography was generated by statistical and numerical operations applied on the matrix data that make up the satellite image. For this analysis, the free software SOPI 3.0 was used to process the Landsat 7 and 8 satellite images of the years 2002 and 2015. The cartography was prepared using the free software QGIS 3.2.2 and Google Earth Pro.

Results:

The best results of digital processing were given in the visible bands and by different combinations of bands in RGB. Thirteen main volcanic systems, highly eroded and with associated pahoehoe lavas, are described, as well as secondary eruptions with rugged aa-type lavas superimposed on the more fluid lavas.

Conclusions:

The application of digital satellite image processing is an optimal tool for the study of volcanic structures, which allows their delimitation and classification.