بازسازی آب‌و‌هوای کواترنر پسین در بخشی از شمال ایران (لُس های نکا) با استفاده از ‏داده‌های مغناطیسی و ژیوشیمیایی

The study area is situated at about 8 km away of neka city, on the main road of sari-behshahr, in mazandaran province, north of iran. it is ‎bounded by alborz fault in the south and caspian sea coast line in the north. we applied new environmental magnetism technique and ‎methods including magnetic susceptibility, magnetic mineralogy, irm and s-irm to reconstruct the past 50 ka climate conditions and also ‎investigate relationship between climate change and magnetic variations. we also compared the geochemistry and magnetic analysis of the ‎loess/palaeosol deposits and the results were used to correlate these variations with climate change in the study area. the pattern of variation ‎of geochemical data shows similarity with those of magnetic one. the increase/decrease in magnetic susceptibility is coinciding with ‎palaeosol/loess sequences. plotting magnetic susceptibility variation versus lithological column of kolet section enabled us to recognize ‎short period of climatically cycles known as stadials/interstadials in loess/palaeosol sequences. we recognized 4 stadials for upper palaeosol, ‎single stadial for lower palaeosol, 6 interstadials for upper loess and one interstadial for lower loess deposites‎