Environmental Aspects of a Major ARD Source at El Indio Au-Cu-As District, North-Central Chile

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dc.contributor.authorOyarzún, Jorge
dc.contributor.authorMaturana, Hugo
dc.contributor.authorPaulo, Andrzej
dc.contributor.authorLillo, Javier
dc.contributor.authorPasten Gonzalez, Pablo Arturo
dc.contributor.authorNúñez, Jorge
dc.contributor.authorDuhalde, Denisse
dc.contributor.authorGonzález, Cinthya
dc.contributor.authorPortilla, Adriana
dc.contributor.authorOyarzún, Ricardo
dc.date.accessioned2022-11-25T15:41:56Z
dc.date.available2022-11-25T15:41:56Z
dc.date.issued2022
dc.description.abstractEl Indio, an Au-Cu-As deposit with outstanding gold grades, was mined in the Andes of the Coquimbo region, Chile, between 1975 and 2002. Sediment and water sampling of the rivers in the 2000 s found exceptional As and metal levels in modern and old sediments. The studies also revealed that acid rock drainage (ARD) has been present in the district for nearly 10,000 years and the effect that the mining of the district had in terms of geochemical anomalies. The convergence of mineralogical, structural, and hydrologic conditions has generated a metal-rich ARD, a process followed by transference of metals to the f ine sediments. In this context, the study also deals with the risk of metal and metalloid transfers from the sediments to the river waters as a consequence of eventual physical-chemical changes, due for example, to climatic-driven conditions. Water and sediment samplings were carried out to provide materials for selective extraction tests under acidic, acid-reducing, and acid-oxidizing conditions. The different behavior of metals and metalloids was revealed and highlighted the refractory character of As. Additionally, the study included the characterization of the sediment’s mineralogy, and allowed the detection of new geochemical anomalies of Cu, Zn, Co, and Y in the Incaguaz River, along with high dissolved Li concentrations in the Toro and Turbio rivers..
dc.format.extent15 páginas
dc.fuente.origenSIPA
dc.identifier.doi10.1007/s10230-021-00804-z
dc.identifier.eissn1616-1068
dc.identifier.issn1025-9112
dc.identifier.urihttps://doi.org/10.1007/s10230-021-00804-z
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/65762
dc.information.autorucEscuela de Ingeniería ; Pasten Gonzalez, Pablo Arturo ; 0000-0002-9961-9342 ; 10645469
dc.issue.numero41
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final224
dc.pagina.inicio210
dc.revistaMine Water and the Environmentes_ES
dc.rightsacceso restringido
dc.subjectCoquimbo regiones_ES
dc.subjectElqui valleyes_ES
dc.subjectHydrothermal Lies_ES
dc.subjectCu-Zn-Co-Y-Anomalieses_ES
dc.subjectARDes_ES
dc.subjectSequential extractionses_ES
dc.titleEnvironmental Aspects of a Major ARD Source at El Indio Au-Cu-As District, North-Central Chilees_ES
dc.typeartículo
dc.volumen41
sipa.codpersvinculados10645469
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