THE STUDY OF LATERAL VARIATION OF GRAIN SIZE AND MINERALOGY IN ORDER TO
DETERMINE PREVAILING WINDS DIRECTION IN THE FORMATION OF LOESS SEDIMENTS OF GOLESTAN PROVINCE

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KHADJEH M.; GHAYOUMIAN J.; FAIZNIA S.

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Journal: Desert Year:2004 | Volume:9 | Issue:2 Page(s): 293-306

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Title

THE STUDY OF LATERAL VARIATION OF GRAIN SIZE AND MINERALOGY IN ORDER TO DETERMINE PREVAILING WINDS DIRECTION IN THE FORMATION OF LOESS SEDIMENTS OF GOLESTAN PROVINCE

Author(s)

KHADJEH M. | GHAYOUMIAN J. | FAIZNIA S. | Issue Writer Certificate

Keywords

LOESSQ2

GRAIN SIZEQ4

QUARTZQ4

LASER GRANULOMETRYQ4

Abstract

A large part of Golestan Province is covered with LOESS sediments. Although there are many evidence that these sediments are eolian, there still are many discussions about their source, mode of formation and prevailing wind direction. The changing" trend of GRAIN SIZE and QUARTZ abundance in lateral direction determines not only prevailing wind flow direction, but also their source: GRAIN SIZE and QUARTZ abundance decrease in wind flow direction. In this research, it was confirmed that these sediments are eolian and lateral variations of grains size and mineralogical composition, especially QUARTZ were used to determine prevailing winds direction. Afterwards LOESS distribution map in the Province of Golestan was prepared by satellite data (ETM) and with help of Ilwis software. LOESSes and weathered losses were sampled from the depth of 4 meters, to eliminate the effect of weathering. The samples were studied by LASER GRANULOMETRY and XRD. According to the results, average GRAIN SIZE and amount of QUARTZ considerably decrease from north-east to south-west: GRAIN SIZE changes from 6.66φ to 4.97φ and QUARTZ mineral abundance from56.2% to 45.5%. Therefore, according to the obtained results, prevailing winds direction during formation of these sediments was from north-east to south-west and south.

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APA: Copy

KHADJEH, M., GHAYOUMIAN, J., & FAIZNIA, S.. (2004). THE STUDY OF LATERAL VARIATION OF GRAIN SIZE AND MINERALOGY IN ORDER TO DETERMINE PREVAILING WINDS DIRECTION IN THE FORMATION OF LOESS SEDIMENTS OF GOLESTAN PROVINCE. DESERT (BIABAN), 9(2), 293-306. SID. https://sid.ir/paper/5372/en

Vancouver: Copy

KHADJEH M., GHAYOUMIAN J., FAIZNIA S.. THE STUDY OF LATERAL VARIATION OF GRAIN SIZE AND MINERALOGY IN ORDER TO DETERMINE PREVAILING WINDS DIRECTION IN THE FORMATION OF LOESS SEDIMENTS OF GOLESTAN PROVINCE. DESERT (BIABAN)[Internet]. 2004;9(2):293-306. Available from: https://sid.ir/paper/5372/en

IEEE: Copy

M. KHADJEH, J. GHAYOUMIAN, and S. FAIZNIA, “THE STUDY OF LATERAL VARIATION OF GRAIN SIZE AND MINERALOGY IN ORDER TO DETERMINE PREVAILING WINDS DIRECTION IN THE FORMATION OF LOESS SEDIMENTS OF GOLESTAN PROVINCE,” DESERT (BIABAN), vol. 9, no. 2, pp. 293–306, 2004, [Online]. Available: https://sid.ir/paper/5372/en

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