Metal partitioning in acid hypersaline sediments: Lake Tyrrell, Victoria, Australia

Metal partitioning in acid hypersaline sediments: Lake Tyrrell, Victoria, Australia

Oxic, metal-rich, low-pH groundwater enters a playa lake system at Lake Tyrrell. Partitioning of metals in the playa sediments was studied to determine the fate of the dissolved metals. Analysis of leachates from sequential extractions of sediment within the top 70 cm of the lake floor indicates tha...

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Veröffentlicht in:Chemical geology 1992-03, Vol.96 (1), p.167-181
Hauptverfasser: Fegan, N.E., Long, D.T., Lyons, W.B., Hines, M.E., Macumber, P.G.
Format: Artikel
Sprache:eng
Schlagworte:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochemical exploration, methodology, general
Geochemistry
Metallic and non-metallic deposits
Mineralogy
Silicates
Water geochemistry
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container_end_page 181
container_issue 1
container_start_page 167
container_title Chemical geology
container_volume 96
creator Fegan, N.E.
Long, D.T.
Lyons, W.B.
Hines, M.E.
Macumber, P.G.
description Oxic, metal-rich, low-pH groundwater enters a playa lake system at Lake Tyrrell. Partitioning of metals in the playa sediments was studied to determine the fate of the dissolved metals. Analysis of leachates from sequential extractions of sediment within the top 70 cm of the lake floor indicates that most of the Cu, Pb, Zn, Fe and Mn are adsorbed onto Feoxides. Cu, and to a lesser extent Mn, are bound to organics or sulfides in discrete, thin layers, while Pb is deposited on exchangeable sites in upper layers, possibly as sulfates. Metal concentrations are not enriched in the sediments, which may be due to low pH's and/or limited sulfate reduction in the system. The Lake Tyrrell system may represent an ore-forming system before extensive precipitation of metal sulfides.
doi_str_mv 10.1016/0009-2541(92)90127-Q
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source ScienceDirect Journals (5 years ago - present)
subjects Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochemical exploration, methodology, general
Geochemistry
Metallic and non-metallic deposits
Mineralogy
Silicates
Water geochemistry
title Metal partitioning in acid hypersaline sediments: Lake Tyrrell, Victoria, Australia
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