Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s00254-003-0870-6
Volltext Shareable Link
Titel (primär) Surface water quality and sediment geochemistry in the Gualaxo do Norte basin, eastern Quadrilátero Ferrifero, Minas Gerais, Brazil
Autor Costa, A.T.; Nalini jr., H.A.; deLena, J.C.; Friese, K.; Mages, M.
Quelle Environmental Geology
Erscheinungsjahr 2003
Department SEEFO; FLOEK
Band/Volume 45
Heft 2
Seite von 226
Seite bis 235
Sprache englisch
Abstract

This paper describes the geochemistry of water and sediment samples downstream from two iron mines in the Gualaxo do Norte River basin, north of Mariana city, Minas Gerais state, Brazil. Electric conductivity, total dissolved solids, pH, Eh, Na, K, Ca, Mg and trace elements (Fe, Mn, Al, Cd, Ni, Cr, Zn, As, Pb, Co, Sb, Cu, Mo, Rb, Sr, Ti, V, Y, Zr and Ba) have been analysed in water and sediments. The observed Na anomalies are mainly associated with the iron mine processing plants. Enriched concentrations of iron and manganese were only observed in rudimentary gold exploitation areas (prospectors) and where supergenic alteration of the banded iron formation has occurred. Iron and manganese background values are in some places higher than the limits established by Brazilian legislation. Mn, As, Sb and Ba anomalies have been observed in sediments. Their main source is associated with the sulphide-rich mineral deposits in the spring of the Gualaxo, do Norte River and not directly related to the present iron exploitation in the region. Background values are proposed for the studied region.

dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=4768
Costa, A.T., Nalini jr., H.A., deLena, J.C., Friese, K., Mages, M. (2003):
Surface water quality and sediment geochemistry in the Gualaxo do Norte basin, eastern Quadrilátero Ferrifero, Minas Gerais, Brazil
Environ. Geol. 45 (2), 226 - 235 10.1007/s00254-003-0870-6