METAL PARTITIONING IN ACID HYPERSALINE SEDIMENTS - LAKE TYRRELL, VICTORIA, AUSTRALIA

被引：10

作者：

FEGAN, NE

LONG, DT

LYONS, WB

HINES, ME

MACUMBER, PG

机构：

[1] MICHIGAN STATE UNIV,E LANSING,MI 48824

[2] UNIV NEW HAMPSHIRE,INST EARTH OCEANS & SPACE,DURHAM,NH 03824

[3] DEPT WATER RESOURCES,MELBOURNE,VIC 3000,AUSTRALIA

来源：

CHEMICAL GEOLOGY | 1992年 / 96卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0009-2541(92)90127-Q

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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 Fe-oxides. 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.

引用

页码：167 / 181

页数：15

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