Lacustrine sediments provide excellent continental records of past variations in environment and biological activities. The radiocarbon dating using accelerator mass spectrometer is indispensable to perform paleo-environmental studies. Lake Baikal (Russia) and Lake Khubsugul (Mongolia) are one of the largest lakes in East Eurasia, and Lake Erhel is saline lake (S=20permil) in Mongolia. Radiocarbon ages of the lake sediments were measured by Tandetoron accelerator mass spectrometer at the Center for Chronological Research, Nagoya University. The linear sedimentation rate is estimated to be 18.2 cm/kyr for the Ver99G12 sediment core from Lake Baikal, based on the conventional 14C ages. AMS 14C ages of total organic materials in the HDP04 sediment core (Lake Khubsugul) do not become progressively older with depth, which suggest that sedimentary layers were disturbed by piston coring. The linear sedimentation rates of Lake Erhel sediment core are 5.2 cm/kyr for cool period (ca.11-24kyr BP) and 9.1-34.6 cm/kyr for warm period (ca.3-9kyr BP).
See more of Poster Session II
See more of The 10th International Conference on Accelerator Mass Spectrometry (September 5-10, 2005)