INVESTIGATION ON COMPOSITION AND EVOLUTION OF CLAY MINERALS IN THE LOESS DEPOSITS AND PALEOSOLS OF GHAPAN AREA, GOLESTAN PROVINCE

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ALMASI A.; PASHAEI AVAL A.; AYOUBI S.; JALALIAN A.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2006 | Volume:13 | Issue:3 Page(s): 10-20

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Title

INVESTIGATION ON COMPOSITION AND EVOLUTION OF CLAY MINERALS IN THE LOESS DEPOSITS AND PALEOSOLS OF GHAPAN AREA, GOLESTAN PROVINCE

Author(s)

ALMASI A. | PASHAEI AVAL A. | AYOUBI S. | JALALIAN A. | Issue Writer Certificate

Keywords

CLAY MINERALQ2

LOESSQ2

PALEOSOLQ4

X-RAY DIFFRACTIONQ4

Abstract

The CLAY MINERALogy is useful to understand the soil genesis and weathering processes. This study was conducted to investigate the composition and evolution of CLAY MINERALs in the LOESS deposits and PALEOSOLs of Ghapan region in Golestan province. Through field observations and identification of trench, all horizons in these soils were selected for mineralogical studies. Soil and parent material samples were analyzed by XRD, after necessary pretreatments. The results revealed that in the parent material of the surface section did not detected, while smectite and mixed mica-smectite were observed in the soil samples, due to high weathering in PALEOSOL samples. These expanding minerals have formed by transformation of illite, according to decrease of illite in soil sample, compared to parent material. Presence of palygorskite in the 7th section, in spite of its absence in the LOESS, indicated in situ formation of this CLAY MINERAL under high pH and Mg/Ca ratio conditions. Smectite, in 14th section, has formed ontogenetically, and also inherited from parent material, whereas in the other sections inherited from parent materials and by transformation of illite. High amount of smectite in buried PALEOSOLs compared to LOESS deposits probably indicates moisture regime through interglacial compared to glacial periods.

Cites

بررسی کانی شناسی نهشته های لسی کواترنری در استان گلستان، ایران

References

شناسایی و نحوه تشکیل کانی های رسی در خاک های منطقه فرخ شهر، استان چهارمحال و بختیاری

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APA: Copy

ALMASI, A., PASHAEI AVAL, A., AYOUBI, S., & JALALIAN, A.. (2006). INVESTIGATION ON COMPOSITION AND EVOLUTION OF CLAY MINERALS IN THE LOESS DEPOSITS AND PALEOSOLS OF GHAPAN AREA, GOLESTAN PROVINCE. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 13(3), 10-20. SID. https://sid.ir/paper/9221/en

Vancouver: Copy

ALMASI A., PASHAEI AVAL A., AYOUBI S., JALALIAN A.. INVESTIGATION ON COMPOSITION AND EVOLUTION OF CLAY MINERALS IN THE LOESS DEPOSITS AND PALEOSOLS OF GHAPAN AREA, GOLESTAN PROVINCE. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2006;13(3):10-20. Available from: https://sid.ir/paper/9221/en

IEEE: Copy

A. ALMASI, A. PASHAEI AVAL, S. AYOUBI, and A. JALALIAN, “INVESTIGATION ON COMPOSITION AND EVOLUTION OF CLAY MINERALS IN THE LOESS DEPOSITS AND PALEOSOLS OF GHAPAN AREA, GOLESTAN PROVINCE,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 13, no. 3, pp. 10–20, 2006, [Online]. Available: https://sid.ir/paper/9221/en

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