Categories
vol-21SEASONAL VARIATIONS IN CHEMICAL AND MINERALOGICAL
PROPERTIES OF QARUN LAKE SEDIMENTS
BY
R. M. N. ElJ-REGAL,*
*National Institute of Oceanogr. & Fisheries, AL-Kanater AI-Khayria, Egypt.
Key Words: Chemical, Mineralogical and Sediments.
ABSTRACT
Values of pH , salinity (as EC) calcium and magnesium ( Mg+ 2)
were increased westwards in the bottom sediments ofthe investigated
Lake . The highest pH values were recorded in the Spring and the lowest
in Summer, while the highest values of EC ,Mg+2, Chloride (Cl-f) and
Sulphate( S04-2 ) were recorded in Summer. Soluble (S04-2) and Cl-1
in the western sector were higher than those ofthe eastern side. Lake
sediment samples were rich in organic matter content attaining relatively high value in Spring, except for the middle sector, where the
highest values were recorded in Summer.
Montmorillonite was the dominant clay mineral (31-69%),
however it decreased westwards. Vermiculite, Illite and Kaolinite were
also found but with a less occurrence. Calcite, Quartz and Feldspars
were dominant among the non-clay minerals.
