Calcium Oxalates in Soils within Disturbed Landscapes and Rock on the Territory of Yakutia (Russia), Formation Conditions in a Sharply Continental Cryoarid Climate

The formation of oxalates in soils and rocks under conditions cryoarid climate, permafrost taiga vegetation was studied. Whewellite weddellite were found four areas associated with the mining industry: on kimberlite deposit Daldyn territory, lower reaches Markha River Central Yakut Plain, coastal outcrop Allah-Yun Sellah-Khotun ore cluster. upper organic horizon Skeletic Cryosol (Thixotropic) (sample 151) as a film surface plant remains Humic Fluvisols 1663). Weddellite an extensive encrustation soil cover Stagnic Cryosols Reductaquic 984) siltstone KM-6-21). Calcium identified by X-ray phase analysis, photographs samples taken polarizing microscope, crystal morphology studied scanning electron microscope. To determine chemical composition rocks, classical wet-chemical method used; physical properties using pH meter, photoelectric colorimetric method, synchrotron thermal analysis device. source calcium for salts is parent layers soils, represented carbonate clastic which cause neutral slightly alkaline environments. High humidity, provided seasonal thawing permafrost, has key role Yakutia sharply continental climate. Based studies, it that first two are products lichen activity, third fourth at stage initial micromycetes. In addition, these oxalates, our opinion, result protective function vegetation, cases, sharp increase load lichens technogenic impact, second when favorable arise formation, but toxic content heavy metals arsenic.