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Research Article Open access CC BY 4.0

Geological Influence on Stream Sediments Geochemistry from Precambrian Terrains of Uruguay

José Maria Filippini Alba

International Journal of Environment and Climate Change · pp. 438–445 · Published 19 Jul 2025

10.9734/ijecc/2025/v15i74943

Abstract

The National Mining and Geology Directorate of Uruguay (DINAMIGE) recovered, in 2020, geochemical data of Uruguayan Precambrian terrains collected in the 80’s, involving 31,874 soil and stream sediment samples. These samples were analyzed for 22 elements (Ag, As, B, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Nb, Ni, P, Pb, Sb, Sn, V, W, Y and Zn) by direct current plasma spectrometry. Multivariate statistical methods and geographic information system (GIS) procedures applied on a set of 20786 geochemical samples, 84% of total geochemical regional sampling from Uruguay, aiming characterization of geochemical signatures. The work focused on analyzing the influence of geology on the geochemical signature, considering 34 geological formations. The Chuy Formation appeared as the most impoverished and five geological formations stood out from the rest.

Anomaly background environment geochemical exploration outliers trace elements

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