Show simple item record

dc.contributor.authorStavinga, Drewen
dc.date2014-12-21 20:25:09.632
dc.date2014-12-22 20:46:49.218
dc.date.accessioned2014-12-23T16:28:24Z
dc.date.available2014-12-23T16:28:24Z
dc.date.issued2014-12-23
dc.identifier.urihttp://hdl.handle.net/1974/12670
dc.descriptionThesis (Master, Geological Sciences & Geological Engineering) -- Queen's University, 2014-12-22 20:46:49.218en
dc.description.abstractThe Prairie Creek Deposit is an unmined high grade Zn-Pb-Ag deposit located in the southern Mackenzie Mountains of the Northwest Territories. The site is confined within the boundaries of the Nahanni National Park Reserve and is upstream of a UNESCO World Heritage Site. The upper portion of the primary quartz-carbonate-sulphide vein mineralization has undergone extensive oxidation, forming zones rich in smithsonite (ZnCO3) and cerussite (PbCO3). This weathered zone represents a significant resource and a potential component of mine waste material. This research is focused on the characterization of the geochemical and mineralogical controls on metal mobility at Prairie Creek, with particular attention to the metal carbonates as a host for trace elements and their role in sequestering those elements in mine waste conditions. Detailed mineralogical analyses were conducted using a combination of SEM, EMP, MLA, LA-ICP-MS, and synchrotron-based µXRD, µXRF and µXANES techniques. Smithsonite was found to contain concentrations of Ca, Mg, Fe, Cu, Pb, Cd, Sb, Hg, As, Mn, Ag and Se in approximately decreasing order, whereas cerussite (expected to be removed as Pb concentrate) hosts Zn, Cu, Sb, Ag, Hg, Fe, Ca, Cd, As, Mn and Se. A significant proportion of the trace metals may also be attenuated by other secondary minerals. This study has identified previously unreported minor phases, including cinnabar (HgS), acanthite (Ag2S), bindheimite (Pb2Sb2O6(O,OH)), and multiple metal arsenates. Anglesite (PbSO4) may be present in greater proportions than is indicated by previous work. Ore processing will remove most Pb and Zn sulphides as well as cerussite; however, smithsonite will remain in tailings as a major source for most metals. Mobilized Pb may be released primarily from anglesite, with As coming from arsenates, Ag from acanthite and anglesite, Sb from bindheimite, Fe from smithsonite and goethite, Cu from smithsonite, anglesite, malachite, azurite and covellite, and Hg and Se from a combination of smithsonite, anglesite, cinnabar and arsenates. In a mine waste setting, near-neutral pH will favour precipitation and attenuation of trace metals. Regardless, oxidation, dissolution and mobilization is expected to continue at a slow rate, and changes to more acidic or reducing environmental conditions could significantly increase metal release.en
dc.language.isoengen
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectSmithsoniteen
dc.subjectCerussiteen
dc.subjectTrace Metalsen
dc.subjectOxidationen
dc.subjectTailingsen
dc.subjectCarbonatesen
dc.subjectGeochemistryen
dc.titleTrace Element Geochemistry and Metal Mobility of Oxide Mineralization at the Prairie Creek Zinc-Lead-Silver Deposit, NWTen
dc.typethesisen
dc.description.degreeM.A.Sc.en
dc.contributor.supervisorJamieson, Heather E.en
dc.contributor.departmentGeological Sciences and Geological Engineeringen
dc.degree.grantorQueen's University at Kingstonen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record