Dolomite occurrence in Coorong region, South Australia

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5966162

Rosen, M; Warren, J K

Lakes in the Coorong region are filled with a diverse suite of Holocene carbonates; mineralogies include aragonite, calcite, magnesium-calcite, magnesite, hydromagnesite, and dolomite. Dolomite is the main mineral of concern in this paper, yet it makes up no more than 5% of the carbonate minerals forming surficial deposits in the coastal plain of southeast South Australia. Coorong dolomite occurs as three stratigraphically and mineralogically distinct forms. Volumetrically, the most important type of dolomite is an evaporative dolomite laid down as the last episode of sedimentation in those Coorong Lakes that contain dolomite. In most lakes, dolomite is a capstone unit no more than a meter thick, although in a few lakes, it has infilled the lakes to form dolomitic units up to 4-5 m thick. Evaporative dolomite is usually magnesian-rich. In some lakes, a calcian-rich dolomite occurs along the edges of the lake. Like the evaporative upper dolomite, this dolomite is not intergrown with other carbonate phases and appears to define areas where continental ground waters first enter the lake.

• OSTI ID: 5966162
• Report Number(s): CONF-880301-
• Resource Relation: Conference: Annual meeting of the American Association of Petroleum Geologists, Houston, TX, USA, 20-23 Mar 1988
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
DOLOMITE
MINERALOGY
LAKES
SEDIMENTATION
SOUTH AUSTRALIA
ARAGONITE
KEROGEN
ORGANIC MATTER
QUATERNARY PERIOD
STRATIGRAPHY
ALKALINE EARTH METAL COMPOUNDS
AUSTRALASIA
AUSTRALIA
BITUMINOUS MATERIALS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE MINERALS
CARBONATES
CENOZOIC ERA
GEOLOGIC AGES
GEOLOGY
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MATERIALS
MINERALS
OXYGEN COMPOUNDS
SURFACE WATERS
040200* - Oil Shales & Tar Sands- Reserves
Geology
& Exploration