Universität zu Köln

Sharifigarmdareh, J., Khormali, F., Scheidt, S., Rolf, C., Kehl, M. and Frechen, M. (2020). Investigating soil magnetic properties with pedogenic variation along a precipitation gradient in loess-derived soils of the Golestan province, northern Iran. Quat. Int., 552. S. 100 - 111. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-4553

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Abstract

In the Golestan province in northern Iran extensive loess deposits, and widespread loess-derived soils crop out. While a strong precipitation gradient (200-700 mm per year) from North to South is characteristic, temperature differences are negligible (17-18 degrees C per year). Recently, many studies on loess-derived palaeosols and modern soils from this region were published; However, in these publications only limited information on the magnetic properties of loess and loess-derived soils is given, nor the potential of these properties to be applied as proxies for palaeoclimate reconstruction. In order to study soil magnetic properties along the precipitation gradient in the Golestan province, six pedons of modern soils were selected. The physicochemical properties, the clay mineralogy and magnetic parameters of soil samples were analysed. Susceptibility measurements (20.2-130.77 x 10(-8) m(3)kg(-1)), ARM susceptibility values (0.00489-0.068 m(3)kg(-1)), IRM values (0.0027-0.0105 Am(2)kg(-1)), and hysteresis measurements provide significant evidences for an increase of the content of fine grained ferromagnetic minerals with increasing mean annual precipitation. Simultaneously, the amount of SP sized particles increase. Magnetite, maghemite, and hematite are the major magnetic minerals in the studied samples, whereby magnetite seems to be dominant in the soils of the loess plateau of northern Iran. By presenting data from this region of the northern Iran for the first time, another example is provided for the application of magnetic properties as proxies for the reconstruction of the paleoclimate. The results are compared to data of the Chinese loess plateau, the Russian steppe and loessic soils from the midwestern United State with similar relations of pedogenic susceptibility and MAP.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sharifigarmdareh, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Khormali, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Scheidt, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rolf, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kehl, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Frechen, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-328770
DOI:	10.1016/j.quaint.2019.11.022
Journal or Publication Title:	Quat. Int.
Volume:	552
Page Range:	S. 100 - 111
Date:	2020
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-4553
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHINESE LOESS; PALEOSOL SEQUENCE; GRAIN-SIZE; SUSCEPTIBILITY; ENHANCEMENT; CLIMATE; RECONSTRUCTIONS; DEPENDENCE; SIGNATURE; SEDIMENTS Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/32877