Prospección de placeres aluviales en el río Kalaglás ubicado en la parroquia Gualaquiza, cantón Gualaquiza, provincia de Morona Santiago.

Abstract

The objective of this technical project ‘Alluvial placers prospecting’ was to identify areas of alluvial auriferous anomalies in the Kalaglás river located in Gualaquiza Canton, by means of gravimetric (panning) and geochemical (fire assay) techniques, in order to know the gold enrichment potential of the study area. Forty samples were collected and sent to the ALBEXXUS CIA. LTDA. laboratory to determine the Au concentration. Statistical calculations were performed using Excel software and geostatistics was carried out in ArcGIS, including the exploratory análisis of the Au data (ppb), in which 11 interpolation models (simple Kriging/cokriging) were generated and then evaluated qualitatively and quantitatively. The Spherical model presented the best representative distribution according to the grades (ppb), and as for it, the zone of auriferous enrichment was delimited, ehich is located to the Southeast in the points PWS007 (5.33 g/t), PWS008 (5.63 g/t), PWS010 (21.75 g/t) and with the Modified Lepeltier method, geochemical parameters of Background (1.48 g/t), Threshold (5.02 g/t), Subanomaly (8.55 g/t) and anomaly (12.09 g/t) were determined, based on which the mapo f distribution of auriferous anomalies was elaborated. In conclusion, the geostatistical analysis allowed to identify an anomalous zone to the South of the study area that apparently follows a NE-SW trend marked by the effects of the flat relief in this zone. A detailed exploratory and laboratory analysis is recommended to follow up on the zones of higher concentration (21.75 g/t). In the case of the lower (0.03 g/t) gold concentration, a more advanced study should be carried out considering structural and stratigraphic aspects of the study área to verify and / or discard possible zones of gold potential.