Abstract
This contribution presents the composition of the dust aerosol sampled during dust storms in the territory of the weather station Ayvaj, southern Tajikistan, in 2007-2015. High concentrations of the compounds quartz SiO2 (44.3%), calcite CaСO3 (17%), potassium mica KAl2([AlSi3O10](OH,F)2 (12.8%) were found. The statistical characteristics of measured compounds is determined and the correlation coefficients between certain compounds are calculated. A significant correlation is observed between quartz with albite (r=0.65), clinochlore with dolomite-2 (r=0.43), and quartz with dolomite (r=0.40).
Highlights
The Republic of Tajikistan is located in the global dust belt, on the way of transportation of dust from sources such as the Sahara, drying Aral Sea Aralkum, Kyzyl-Kum and Kairakum, the Iranian deserts Dashti Kabir and Dashti Lut, the Takla-Makan Desert and Gobi
The relevance of the studies is related to the need to study the mineralogical composition of the dust aerosol, the dynamics of its change during the invasion of dust storms into the territory of Tajikistan
Quantitative determination of the content of minerals in the dust aerosol during dust storms was carried out using the Bruker D2 PHASER diffractometer
Summary
The Republic of Tajikistan is located in the global dust belt, on the way of transportation of dust from sources such as the Sahara, drying Aral Sea Aralkum, Kyzyl-Kum and Kairakum, the Iranian deserts Dashti Kabir and Dashti Lut, the Takla-Makan Desert and Gobi. Dust, rising in these deserts, invades the territory of Tajikistan through its southern and western borders in the form of dust haze (DH) or dust storm (DS) [1,2,3]. The most severe dust storms, which can carry fine particles over thousands of kilometers, originate in such great desert regions as the Sahara and Northwest China [10].
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