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Details van artikel 3 van 9 gevonden artikelen
| Titel: |
Geochemical evolution of Lake Deborah East, prototype salt lake in the relict drainage of the Yilgarn River of Western Australia |
| Auteur: |
Salama, R. Barber, C. Hosking, J. Briegel, D. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 39 (1992) nr. 5 pagina's 577-590 |
| Jaar: |
1992-12 |
| Inhoud: |
Lake Deborah East is a playa lake in the relict drainage of the Yilgarn River. Its surface is covered by a thick salt crust underlain by stratified lacustrine deposits of unconsolidated evaporite minerals intercalated with clay and sand. Halite has formed from groundwater and surface water sources through a continuous process of salt recycling accompanied by rejection of bromide by the crust, and high bromide and bitterns have built up in the brines. The lower part of the sequence was deposited during the Late Tertiary and the top 2 m during the Quaternary. The salt budget indicates prolonged arid periods during which no salt has been added to the lake and suggests additional losses by deflation and overflow during other periods. The distinct layering in the lake, the presence of gypsum and salt layers within the lake sediment, supersaturation of the brines with respect to gypsum and halite at depth, and the distinct pattern of groundwater discharge into the lake, suggest that the mudstone layers at the bottom of the lake form a permeability barrier preventing the brines from migrating downward. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 9 gevonden artikelen
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