Earth’s Cryosphere, 2012, vol. XVI, No. 2, с. 9–22
STRUCTURE AND GENESIS OF THE UNDERGROUND ICE IN THE NEOPLEISTOCENE-HOLOCENE SEDIMENTS OF MARRE-SALE CAPE, WESTERN YAMAL
E.A. Slagoda1, O.L. Opokina1, V.V. Rogov2, A.N. Kurchatova3
1 Earth Cryosphere Institute, SB RAS, 625000, Tyumen, P/O box 1230, Russia; eslagoda@ikz.ru
2 Lomonosov Moscow State University, Department of Geography, 119991, Moscow, Leninskie Gory, 1, Russia
3 Tyumen State Oil and Gas University, 625000, Tyumen, Volodarskogo str., 38, Russia
In 2008–2010 the polygonal ice wedges and massive ground ice were observed in the sections of coastal cliff of Marre-Sale cape. The upper ice layer was complicated by laccolites, stocks and fissures, the lower massive ice – by anticlinal folds. Analyses of lithology and deformations of the inclosing sediments, interrelation between polygonal and massive ice, chemical and isotope composition, ice structure have been carried out. The repeatedinjection genesis of the upper massive ice with laccolites and segregation genesis of the lower ice layer have been established. It has been ascertained that the formation of the upper massive ice had occurred in the Holocene during talik freezing in the khasyreys.
Key words: Massive ice, polygonal ice wedges, repeated ice injection, deformations of the sediments, Western Yamal.