Modern dolomite deposition in continental, saline lakes, western Victoria, Australia

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Geology; (United States)

DOI:https://doi.org/10.1130/0091-7613(1988)016<0029:MDDICS>2.3.CO;2· OSTI ID:5366914

De Deckker, P; Last, W M

Microcrystalline dolomite forms a major constituent of Holocene sediments of numerous continental, saline playa lakes in southeastern Australia. The lake waters are highly supersaturated with respect to dolomite as well as other Mg carbonates, but undersaturated or near saturation with respect to calcite and aragonite. The dolomite shows no replacement textures and most likely formed by direct precipitation. Conditions in these lakes that appear conducive to the precipitation of dolomite are (1) high salinity, (2) high Mg/Ca ratios, and (3) high alkalinity. The moderate sulfate levels of the brines do not seem to be inhibiting carbonate precipitation.

• Research Organization: Monash Univ., Clayton (Australia)
• OSTI ID: 5366914
• Journal Information: Geology; (United States), Journal Name: Geology; (United States) Vol. 16:1; ISSN GLGYB
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
&amp; Exploration
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
AUSTRALASIA
AUSTRALIA
CALCIUM
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
DEPOSITION
DOLOMITE
ELEMENTS
GEOLOGIC DEPOSITS
LAKES
MAGNESIUM
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
METALS
MINERAL RESOURCES
MINERALS
ORIGIN
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
PH VALUE
PRECIPITATION
QUANTITY RATIO
RESOURCES
ROCKS
SALINITY
SEDIMENTARY ROCKS
SEDIMENTS
SEPARATION PROCESSES
SURFACE WATERS
VICTORIA