Elemental Depth Profiles of Peat Columns from Tunguska Region

On June 30th 1908 the Tunguska area of the Siberian taiga was hit by the catastrophic impact of the so called Tunguska Cosmic Body (TCB) whose nature has not been clarified yet. The present study is aimed to find out traces of the effects produced as well as remnants of the fallen cosmic body using...

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Bibliographic Details
Main Authors: Daniele Ceccato, Maria Crista Buoso, Mario De Poli, TOSITTI, LAURA, Marcella Mingozzi, FORLANI, LUISA, SANDRINI, SILVIA, BALDACCI, DANIELA, LONGO, GIUSEPPE
Other Authors: Maria-Crista Buoso, Laura Tositti, L. Forlani, S. Sandrini, D. Baldacci, G. Longo
Format: Conference Object
Language:English
Published: s.n 2004
Subjects:
PEAT BOG
TUNGUSKA
PIXE ANALYSIS
taiga
Siberia
Online Access:http://hdl.handle.net/11585/19041
Description
Summary:On June 30th 1908 the Tunguska area of the Siberian taiga was hit by the catastrophic impact of the so called Tunguska Cosmic Body (TCB) whose nature has not been clarified yet. The present study is aimed to find out traces of the effects produced as well as remnants of the fallen cosmic body using the well known behaviour of sphagnum peat bogs as environmental archives and applying PIXE technique. Moreover, the obtained data are valuable to identify atmospheric composition variations in Siberia during the last century. Sampled peat columns were divided into slices and analysed by means of PIXE technique at the INFN-National Laboratories of Legnaro. A precise dating was performed using excess 210Pb geochronology and pollen/charcoal counting. Tests of a μ-PIXE search for TCB micro-remnants are undergoing. The elemental composition profile of the peat layers is presented and the results discussed.

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