GEOSCAN, résultats de la recherche


TitreTemporal variation in discharge chemistry and portal flow from the 8-Level adit, Lynx Mine, Myra Falls Operations, Vancouver Island, British Columbia
AuteurDesbarats, A J; Dirom, G C
SourceEnvironmental Geology vol. 47, 2005 p. 445-456,
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 2003320
ÉditeurSpringer Nature
Documentpublication en série
Mediapapier; en ligne; numérique
Formatspdf (Adobe Acrobat Reader)
Lat/Long OENS-126.0000 -125.5000 49.7500 49.5000
Sujetsgisements minéraux; cuivre; plomb; zinc; gîtes sulfureux; résidus; analyses des résidus; eau souterraine; pollution de l'eau souterraine; régimes des eaux souterraines; résurgence des eaux souterraines; exhaure des acides; exhaure des mines acides; métaux de base; lessivage, métal lourd; contamination des métaux lourds; hydrographes; hydrographie; régressions; conductivité; analyses de l'eau; géochimie de l'eau; qualité de l'eau; Mine Lynx ; hydrogéologie; géologie de l'environnement
Illustrationsplots; graphs; sketch maps
Diffusé2004 10 15
Résumé(disponible en anglais seulement)
The Lynx mine, currently inactive, has produced copper and zinc concentrates from massive sulfide deposits on a lease within the rainy, mountainous interior of Vancouver Island. Tailings, used to back-fill a mined-out stope, are being leached by percolating groundwater and the resulting acidic, metal-laden drainage is discharging from the portal of the 8-Level adit. Temporal variations in the flow rate, specific conductance and temperature of the discharge were monitored continuously over a 2-year period while effluent chemistry was sampled weekly. Conductivity was relatively constant throughout most of the year but peaked with the first autumn storm events as accumulated soluble sulfide oxidation products were flushed from the workings. Concentrations of sulfate and most metals were closely correlated with conductivity as were low pH values as stored acidity was released along with dissolved species. Variations in pH controlled the speciation and partitioning of metals between dissolved and particulate phases.