Abstract
The results on the effectiveness of five 2D electrical resistivity tomography (ERT) survey profiles for Ag-Pb-Zn, fluorite, and barite exploration Mississippi Valley Type (MVT) and on the magmatic deposits of northeast Mexico, are presented. The profiles were made in areas with mining activities or mineralization outcrops. Schlumberger, dipole-dipole, and Wenner array configurations were used on the measurements. The results showed that electric resistivity can be used to distinguish between mineralized zones. In magmatic-type Pb-Zn and MVT Pb-Zn deposits, resistivity values are shown as low. In magmatic-type fluorite and MVT fluorite deposits, as well as the MVT barite deposit, low-resistivity values are related to Fe sulfides and clays. With these results it is possible to connect observed surface mineralization with underground mineralization. New mineralized zones are also found and their geometries, extensions, and dipping are reported. Therefore, lower resistivity values can be linked to mineral bodies with higher Ag-Pb-Zn contents, as well as bodies enriched in Fe sulfides, Fe oxides, and clays in the fluorite and barite mineralizations. In most ERT models, fractures and faults are identified, indicating a structural control on mineralization. From the geoelectric patterns we can infer the magmatic and MVT origin of these mineral deposits.
Highlights
Mexico is an important producer of silver, celestine, fluorite, lead, zinc, barite, antimony, manganese, and gold [1]
The aim of this study is to show the preliminary contribution of electrical resistivity The aim of this study is to show the preliminary contribution of electrical resistivity tomography to locate and characterize Ag-Pb-Zn, fluorite, and barite Mississippi Valley Type (MVT) and magmatic tomography to locate and characterize Ag-Pb-Zn, fluorite, and barite MVT and magmatic deposits in northeast Mexico (Figure 1)
Electrical resistivity models were obtained in these mineralized zones
Summary
Mexico is an important producer of silver, celestine, fluorite, lead, zinc, barite, antimony, manganese, and gold [1]. Barite, celestine, and Pb-Zn deposits occur in northeastern Mexico, within Mesozoic carbonates [2]. These deposits belong to a wide variety of ore deposit types, such as epithermal, skarn and MVT [3]. Zn-Pb and associated celestine, fluorite, and barite deposits in the state of Coahuila and neighboring areas in northeastern Mexico. These deposits define a metallogenic province, named the MVT province of northeastern Mexico [2,4]
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