Abstract. A significant geographical feature in Qatar is
represented by aeolian sand dunes, which cover approximately 12 % of the
country's total surface area and are well-developed in the southern region.
This study aims to enhance our understanding of Qatari sand dunes by
investigating their textural parameters, chemical composition, mineralogy,
potential sources of sediment, and transportation mechanisms. To assess the
physical and chemical characteristics of the sand dunes being examined,
various experimental techniques were employed, including grain size
analyses, X-ray fluorescence, X-ray diffraction, scanning electron
microscopy, and energy dispersive spectrometry. The analysis of the studied
sand dunes indicates a combination of calcareous and siliceous materials.
These dunes predominantly consist of quartz, protoenststite, calcite, and
feldspar minerals, with clay minerals being relatively scarce. The chemical
composition of the sand samples shows high levels of silicon oxide,
significant concentrations of calcium, magnesium, and aluminum oxides, along
with smaller amounts of iron, chlorine, potassium, and sulfur oxides.
Furthermore, trace elements such as titanium, strontium, chromium, and
scandium oxides were found in negligible quantities. Based on the physical
and chemical properties observed in the studied sand dunes, it can be
inferred that they originate from the Mesopotamian plain, Zagros Mountains,
and the calcareous coast of the Arabian Gulf are likely of aeolian origin.
The findings derived from our examination of Qatari sand dunes have been
compared with published data from the Arabian deserts situated along the
Mediterranean Sea. The primary objective of this comparative analysis is to
highlight both the common features and distinctive variations in their
composition and origins. This comparative assessment suggests that Qatari
sand dunes exhibit lower maturity levels in terms of silicon content and may
have an origin distinct from those in the Mediterranean region.