Geological and mineralogical characterization of “San José” and “La Arenosa” veins, in Santa Marianita mine of Malvas parish, Zaruma district El Oro province. Revista Científica Ciencias Naturales y Ambientales, [S. l.], v. 13, n. 2, 2019. DOI: 10.53591/cna.v13i2.1195. Disponível em: https://revistas.ug.edu.ec/index.php/cna/article/view/1556. Acesso em: 5 dec. 2025.