INVESTIGATION ON LOESS DEPOSITS OF GHAPAN AND NAHARKHORAN VALLEY DISTRICTS OF GOLESTAN PROVINCE FROM VIEWPOINT OF MORPHOSCOPY AND CHEMICAL PROPERTIES AND SEDIMENTATION CONDITIONS ANALYSIS

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SANAEI ARDAKANI S.

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Paper Information

Journal: IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE) Year:2006 | Volume:37 | Issue:4 Page(s): 627-635

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Title

INVESTIGATION ON LOESS DEPOSITS OF GHAPAN AND NAHARKHORAN VALLEY DISTRICTS OF GOLESTAN PROVINCE FROM VIEWPOINT OF MORPHOSCOPY AND CHEMICAL PROPERTIES AND SEDIMENTATION CONDITIONS ANALYSIS

Author(s)

SANAEI ARDAKANI S. | Issue Writer Certificate

Keywords

LOESSQ3

MORPHOSCOPICAL STUDYQ3

QUARTZQ3

SURFACE TEXTUREQ2

Abstract

Eolian sediments are comprised of two groups of LOESS and eolian sands. They, in distances close to origin, are exposed as sand dunes and then become apparent in the form of LOESS. LOESS sediments are usually yellow but grizzly and contain silt size materials. Iran LOESSes, have mostly been located in its northeast regions. The purpose of this research his to investigate their morphoscopical properties and also, to determine the continuity among the layers of studied sections in which the sedimentation conditions. Have probably been different The selections, are located in two types of climates of the Ghapan region (semiarid and humid) in southern Gorgan. The different stages of this research consist of field operations, chemical tests, brief identification of LOESS components in sand part (greater than 53 microns) and a MORPHOSCOPICAL STUDY of QUARTZ grains. Investigation concerning the components of LOESSes in Ghapan region indicates that gypsy-clayey aggregates and the primary minerals are abundant, where as in the southern Gorgan regions, secondary calcareous-clayey aggregates are the dominant. Morphoscopy research concerning QUARTZ mineral indicates that a high percentage of the samples (greater than 70 percent) fall in angular to semi angular class which indicates that these sediments have not been moved a far distance from their source regions. From the view point of SURFACE TEXTURE, QUARTZ grains are mainly (about 75 percent) aureole and partially (about 25 percent) blur. The form of their aureole (in a high part of the sediments) indicates that they have originated from ancient river beds and have not been transported so far a distance from their origins. Their blurring is generally caused by color blending by Sesquioxides and secondary calcareous effect. That indicates a relatively long time of sediment accumulation as well as the effect of varied climatic conditions, along with salts leaching from the upper horizons and their being deposited in lower horizons.

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APA: Copy

SANAEI ARDAKANI, S.. (2006). INVESTIGATION ON LOESS DEPOSITS OF GHAPAN AND NAHARKHORAN VALLEY DISTRICTS OF GOLESTAN PROVINCE FROM VIEWPOINT OF MORPHOSCOPY AND CHEMICAL PROPERTIES AND SEDIMENTATION CONDITIONS ANALYSIS. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), 37(4), 627-635. SID. https://sid.ir/paper/8385/en

Vancouver: Copy

SANAEI ARDAKANI S.. INVESTIGATION ON LOESS DEPOSITS OF GHAPAN AND NAHARKHORAN VALLEY DISTRICTS OF GOLESTAN PROVINCE FROM VIEWPOINT OF MORPHOSCOPY AND CHEMICAL PROPERTIES AND SEDIMENTATION CONDITIONS ANALYSIS. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)[Internet]. 2006;37(4):627-635. Available from: https://sid.ir/paper/8385/en

IEEE: Copy

S. SANAEI ARDAKANI, “INVESTIGATION ON LOESS DEPOSITS OF GHAPAN AND NAHARKHORAN VALLEY DISTRICTS OF GOLESTAN PROVINCE FROM VIEWPOINT OF MORPHOSCOPY AND CHEMICAL PROPERTIES AND SEDIMENTATION CONDITIONS ANALYSIS,” IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), vol. 37, no. 4, pp. 627–635, 2006, [Online]. Available: https://sid.ir/paper/8385/en

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