the Siahkuh playa is one of the greatest deserts in Yu.d province
and is located in the north-north eastern of Ardakan city. In playa regions,
different sub-environments with different mineral potentials can be
recognized. In Siahkuh playa, various evaporite minerals such as gypsum in
different form (sugery, nodular and euhedral crystals), halite (fibrous,
cylindrical, hopper-shaped crystals and ball-shaped), and sodium sulfate
were indentified. Sodium su lfate (Thenardite) is a commercial chemical
compound which is formed in playas environments. This compound was also
found for the first time in mud flat sub-environment of SW of Siahkuh
playa. In brine waters of salt lakes sub-environment of Siahkuh playa.
various elements such as lithium, magnesium, calcium, potassium and
sodium were detected.