INVESTIGATION ON SEDIMENTOLOGY OF LOESS DEPOSITS OF GHAPAN AND NAHAR- KHORAN DISTRICTS AND THE ORIGIN ESTIMATING, GOLESTAN PROVINCE

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SANAEI ARDAKANI S.; PASHAEI A.; AYOUBI SH.A.; EKHTESASI M.R.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2007 | Volume:13 | Issue:5 Page(s): 38-48

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Title

INVESTIGATION ON SEDIMENTOLOGY OF LOESS DEPOSITS OF GHAPAN AND NAHAR- KHORAN DISTRICTS AND THE ORIGIN ESTIMATING, GOLESTAN PROVINCE

Author(s)

SANAEI ARDAKANI S. | PASHAEI A. | AYOUBI SH.A. | EKHTESASI M.R. | Issue Writer Certificate

Keywords

LOESSQ2

SILTQ2

GRANULOMETRYQ3

MORPHOSCOPYQ3

QUARTZQ3

Abstract

In general, LOESS sediments are one of the most widespread forms of eolian sediments. These sediments are usually yellow but grizzly and approximately 70 to 90 percent of their formation is SILT materials. Iran LOESSes often are located in northeast region and in this research, sedimentology properties of LOESSes in Ghapan (semiarid climate) and Naharkhoran valley (humid climate) regions have been studied. The stages of this research consist of field operations, brief identification of LOESS components in sand part, MORPHOSCOPY study of QUARTZ grains and GRANULOMETRY operations. In our reading concerning GRANULOMETRY, the different components of sand with using wet sieve method and SILT and clay components with the help of pipette method were separated and their weight percent were measured. The conclusions of this research concerning sediments indicated that, median diameters is between 4 to 11 microns and mean diameter is between 3 to 8 microns. Their sorting, skewness and kurtosis are very poorly sorted, fine skewed and platy kurtic respectively. The statistical conclusions indicate that the sediments which are found in Ghapan and the ones, which are found in southern Gorgan, have significant difference in median and mean diameters and sorting. Consequently the Ghapan LOESSes are coarser and their sorting is better, but they are equal from sight of skewness and kurtosis. Our investigation concerning the components of LOESSes in Ghapan region indicates that gypsy-clayey aggregates and some of the primary minerals are abundant, whereas in the southern Gorgan regions, secondary calcareous-clayey aggregates are great. MORPHOSCOPY research concerning QUARTZ mineral indicates that these samples are located in angular to semi angular class and they have not been moved much distance from their source locations. From the point of surface texture, QUARTZ grains are mainly aureole and partially blur. The form of their aureole indicates that they have been taken from ancient rivers bed and have been deposited in eolian sedimentary environment and their blurring shows wind abrasion, color blending by Sesquioxids and secondary calcareous effect.

Cites

THE ORIGIN OF YELLOW SEDIMENTARY SPOTS IN BAYAZEH

References

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

Cite

APA: Copy

SANAEI ARDAKANI, S., PASHAEI, A., AYOUBI, SH.A., & EKHTESASI, M.R.. (2007). INVESTIGATION ON SEDIMENTOLOGY OF LOESS DEPOSITS OF GHAPAN AND NAHAR- KHORAN DISTRICTS AND THE ORIGIN ESTIMATING, GOLESTAN PROVINCE. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 13(5), 38-48. SID. https://sid.ir/paper/9423/en

Vancouver: Copy

SANAEI ARDAKANI S., PASHAEI A., AYOUBI SH.A., EKHTESASI M.R.. INVESTIGATION ON SEDIMENTOLOGY OF LOESS DEPOSITS OF GHAPAN AND NAHAR- KHORAN DISTRICTS AND THE ORIGIN ESTIMATING, GOLESTAN PROVINCE. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2007;13(5):38-48. Available from: https://sid.ir/paper/9423/en

IEEE: Copy

S. SANAEI ARDAKANI, A. PASHAEI, SH.A. AYOUBI, and M.R. EKHTESASI, “INVESTIGATION ON SEDIMENTOLOGY OF LOESS DEPOSITS OF GHAPAN AND NAHAR- KHORAN DISTRICTS AND THE ORIGIN ESTIMATING, GOLESTAN PROVINCE,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 13, no. 5, pp. 38–48, 2007, [Online]. Available: https://sid.ir/paper/9423/en

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