Sísmica Rasa e Imageamento Acústico Aplicados em Sistema Fluvial: Análise Qualitativa e Identificação de Fácies Arquiteturais Diamantíferos do Rio Araguaia – Mato Grosso

This work presents a geophysical analysis applied to riverbed architectural fácies. Shallow seismic reflection and acoustic imaging were used to determine superficial and shallow distribution of hydrosedimentological features, attempting to find specific sites related to gravels (possibly diamondiferous) and sand bars in Rio Araguaia Basin. Survey lines were run along longitudinal transects parallel to the river channel with acoustic equipments: side-scan sonar and sub-bottom profiler. This combination provided a helpful tool used for accurate mapping of sub-superficial reflectors possibly related to diamondiferous deposition.