Инд. авторы:	Xuan P.T., Van Pho N., Gas'kova O.L., Bortnikova S.B.
Заглавие:	Geochemistry of surface waters in the vicinity of open pit mines at the Cay Cham deposit, Thai Nguyen province, northern Vietnam
Библ. ссылка:	Xuan P.T., Van Pho N., Gas'kova O.L., Bortnikova S.B. Geochemistry of surface waters in the vicinity of open pit mines at the Cay Cham deposit, Thai Nguyen province, northern Vietnam // Geochemistry International. - 2013. - Vol.51. - Iss. 11. - P.931-938. - ISSN 0016-7029. - EISSN 1531-8397.
Внешние системы:	DOI: 10.1134/S0016702913110062; SCOPUS: 2-s2.0-84892880071; WoS: 000326105200007;
Реферат:	eng: This study provides an assessment of the environmental impact of open pit mining operations at the Cay Cham titanomagnetite-ilmenite deposit (northern Vietnam). The results of surface water sampling indicate the formation of acid mine drainage and contamination of adjacent areas by heavy metals (Cu, Zn, Ni, and Mn). The acid mine drainage is produced by oxidation leaching of sulfide minerals associated with primary mineralization owing to the low neutralization potential of the natural waters in the humid environment of tropical rainforest. The study showed that alternating dry and wet seasons typical of this climatic region promote the generation of stored acidity leading to a sharp decrease in pH of drainage water during the wet season and result in the negative impacts of this mine on both flowing and stagnant surface waters. © 2013 Pleiades Publishing, Ltd.
Ключевые слова:	oxidation of sulfides; stored acidity; surface waters; titanomagnetite-ilmenite deposit; Acid mine drainage; Viet Nam; Thai Nguyen; water chemistry; titanomagnetite; surface water; sulfide; oxidation; open pit mine; leaching; ilmenite; environmental impact assessment; acidity; acid mine drainage; Surface waters; Open pit mining; Natural water geochemistry; Ilmenite; Heavy metals; Environmental impact; Deposits; Copper; Tropical rain forest; Oxidation of sulfides; Mining operations; Humid environment; Humid climates; Dry and wet seasons; humid climate; Climatic regions;
Издано:	2013
Физ. характеристика:	с.931-938