DBPapers
DOI: 10.5593/SGEM2014/B52/S20.027

DYNAMICS OF SEDIMENTATION IN THE BIG TAMBUKAN SULFIDE LAKE ACCORDING TO THE RESULTS OF 137CS AND 210PB SPECIFIC ACTIVITY MEASUREMENT

A.N. Kuznetsov,Yu. A. Fedorov, I.V. Dotsenko, K. A. Afanasiev.
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-18-6 / ISSN 1314-2704, June 19-25, 2014, Book 5, Vol. 2, 201-206 pp

ABSTRACT
A series of complex scientific expeditions were carried out. The samples of water and
bottom sediments of the Big Tambukan Lake were taken. In these samples the specific activities of natural and anthropogenic radio-isotopes including Cesiun-137 and Lead- 210 were measured. Due to the results of analysis of cesiun-137 and lead-210 vertical distribution in the sediment cores the sedimentation rate in the Big Tambukan Lake is estimated at 3.2 to 3.5 mm per year. The data on the Lead-210 excessive activity is used to study the temporal fluctuations of sedimentation rates. The data present in the report of regular observations of the lake level shows that these fluctuations of sedimentation rates are conditioned by dramatic changes in the lake level.

Keywords: sedimentation rate, sulfide lake, the Big Tambukan Lake, radioisotopes,
specific activity.