FOG Freiberg Online Geology FOG is an electronic journal registered under ISSN 1434-7512 2012, VOL 33 Issyk-Kul Lake, Kyrgyzstan Broder Merkel (Editor) 140 pages, 39 figures, 25 tables, 103 references i Content Investigation of the natural uranium content in the Issyk-Kul Lake, Kyrgyzstan Zheenbek Kulenbekov and Broder J. Merkel 3 Assessment of radionuclides and toxic trace elements mobility in uranium tailings by using advanced methods, Kyrgyzstan Zheenbek Kulenbekov, Sreejesh Nair, Nicolai A. Kummer, Sepp Unterricker and Broder J. Merkel 46 Danger and risk of natural and man-caused disasters in the mountains of Kyrgyzstan Torgoev I.A., Alioshin Yu.G., Aitmatov I.T. 106 Monitoring landslides in Kyrgyzstan Torgoev I, Alioshin Yu.G., Torgoev A. 130 ii 1. Investigation of the natural uranium content in the Issyk-Kul Lake, Kyrgyzstan Zheenbek Kulenbekov1 and Broder J. Merkel2 1,2Technical University Bergakademie Freiberg, Department of Hydrogeology, Gustav-Zeuner, 12, Freiberg, D-09599, Germany, email:
[email protected] 1.1. Abstract Work presented is related to investigations of the Issyk-Kul Lake that is located in the northern part of Kyrgyzstan. Issyk-Kul Lake is a mountainous, moderate salty terminal lake which contains an anomalous concentration of natural uranium. According to hydrochemical analyses the concentration of natural uranium is in the range of 62 to 65 µg/l. Aim of this study was to propose a hypothesis for the reason of the anomalous natural uranium occurrence in the Issyk-Kul Lake by means of investigating hydrogeochemical properties of the lake, rivers and sediments surrounding the Issyk-Kul Lake. All information including those who are published in Russian language and in particular about geological dating of the Issyk-Kul basin was reviewed.