Interpretation of magnetic field and geological charts of the semidesert of Zacatecas
DOI:
https://doi.org/10.33064/iycuaa2017701822Keywords:
lithological formation, multivariate analysis, hierarchical diagrams, magnetic susceptibility, mineral structuresAbstract
The semidesert region of Zacatecas has been a major driver of economic development sustained at an industrial level by the quantity, quality and price of the minerals found in 13 stunning lithological formations in this state. The study area of approximately 3,744 km2 is characterized by rocks of basaltic composition, rhyolite, intrusive rocks such as granodiorite, monzonite of the terciary period at the beginning of the Cenozoic Era, and also low to medium grade metamorphic rocks also characterized by the type of contact metamorphism of low average degree. Multivariate analysis was used to build hierarchical diagrams (dendrograms) and maps of similarities. The main spots of high magnetic susceptibility were obtained to be in formations from the quaternary, terciary, early Creataceous and late Jurassic periods, which implies that the highest content of ferromagnetic minerals is to be found in this layers of rock and in certain deep mineral structures.
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