Geochemical model of the formation of anomalous layer 1908–1910 in bottom sediments of Lake Peyungda (Tunguska Nature Reserve) according to the data of X-ray fluorescence microanalysis with synchrotron radiation

In the bottom sediments of Lake Peyungda, located 30 km from the epicenter of the Tunguska Cosmic Body (TCB) explosion in 1908, a layer with an increased concentration of chemical elements has been found. For its study, methods of scanning X-ray fluorescence microanalysis, electron microscopy, and Raman spectroscopy have been employed. In the layer corresponding to the years 1908–1910, there is an observed increase in the number of mineral grains resulting from the weathering of the surrounding rock, which is likely associated with the TCB explosion.