RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 7, ES3004, doi:10.2205/2005ES000173, 2005
[2] Lake sediments act as natural archives providing information for changes in the environment for the last 104 to 106 years in the annual to millennial scales [Evans and Heller, 2003]. The recent greatest project of studying the Baikal Lake sediments provided information for climate and tectonic activity variations for the period of more than 10 million years [Kashiwaya et al., 2001; Prokopenko et al., 2002]. The low rate of sediment accumulation in large lakes does not allow one to get high-resolution records. Moreover, the existence of breaks and abrupt changes in the sediment accumulation rates preclude the creation of adequate time scales for the sedimentary rock cores. Variations in the deposition rate of the sediments are controlled not only by regional and global climatic and tectonic conditions but also by local factors, such as bottom water flows and turbidites.
[3] Proceeding from the study of the magnetic properties of sediments in the Khubsugul Lake, we determined the nature of the magnetic minerals of these sediments and proved the possibility of recording abrupt changes in the conditions and rate of sedimentation. The results of our study can be used to derive time scales for the sediment cores and to reconstruct environmental changes in the region for the last several million years.
Citation: 2005), The origin of magnetic minerals in the Lake Khubsugul sediments (Mongolia), Russ. J. Earth Sci., 7, ES3004, doi:10.2205/2005ES000173.
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