Análise estatística aplicada a Prospecção geoquímica de ouro na área designada 5246AD

Abstract

Soils have been one of the most widely used sampling media in geochemical mapping, serving as a reference for geological mapping, mineral prospecting and metallogenic studies due to its foundation, which is based on the fact that is based on the fact that soils reflect the composition of the parent rock. The geochemical data processed and interpreted is the result of fieldwork carried out by the Instituto Nacional de Minas (INAMI) in Designated Area 5246 AD to identify areas favorable to the areas favorable to the occurrence of Gold in the Changara District, Tete Province between July 7 and August 1, 2018. August 01, 2018. During this activity, 135 stream sediment samples were collected in the Designated Area 5246 AD previously defined for studies in an area of 6 461.01 hectares. The samples were sent for chemical analysis of a total of 15 chemical elements (K,Ca, Ti,V,Sc,Cr, Ni, Cu, Zn, Co, Au, Fe, Sb, Pb and Mn), which were extracted using the Bulk cyanide Leach (BCL) technique. In order to understand the variables studied, univariate statistics were applied for the post-selection of and geochemical anomalies was applied, culminating in the preparation of maps of distribution maps. Bivariate statistics allowed the variables to be grouped according to their geochemical geochemical affinity, allowing three groups to be distinguished with a weak, medium and strong positive correlation. strong. And the factorial analysis applied in the multivariate study enabled five factors to be distinguished Ti-V-Mn-Fe-Zn association forming factor 1, K-Au-Pb association representing factor 2, the Cr-Ni-Cu association forming factor 3, factor 4 formed by Ca-Sc-Co and factor 5 formed by Sb alone. only Sb. Using statistical analysis techniques (univariate, bivariate and multivariate) and geostatistics, this project scientific project aims to identify and characterize the areas of occurrence of these elements sampled in soils in area 5246AD, geological map 1ː5000, of sheet 684. Translated with DeepL.com (free version). (TRADUÇAO NOSSA)