Preliminary results of isotope studies of late Pleistocene mammoth of North Yakutia

During last years were collected the largest paleontological material of Mammoth fauna on the Laptev Sea surroundings. It includes a lot of woolly mammoth bones and several bones of them have small size. Morphological structure of these bones indicates that they are bones of small adult animals (Mammuthus primigenius). Isotope investigation (813Ccarb, 5 13Ccoll, 815N) achieves: big (normal size) woolly mammoth lived at the north part of Yakutia during both worm and cold periods of the Late Pleistocene (from 50 kyr to 12 kyr BP). Small woolly mammoth probably lived during worm intervals of the Late Pleistocene only; most probably in warm periods mammoths had possibility to use more wide range of food or to use food inaccessible during cold time including one with greater proportion of proteins (shrub twigs?); small and "normal" woolly mammoths inhabited at different landscape (first lived at more moister places than second). Chemical composition (35 elements) of both small and "normal" mammoths' bones was determinated by the X-Ray fluorescence spectrometry (XRF analysis).