Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975avest...9..178v&link_type=abstract
Astronomicheskii Vestnik, vol. 9, July-Sept. 1975, p. 178-183. In Russian.
Astronomy and Astrophysics
Astronomy
Earth Surface, Meteorite Craters, Micrometeoroids, Tungusk Meteorite, Meteoroid Concentration, Meteoroid Dust Clouds, Particle Flux Density, Particle Size Distribution
Scientific paper
Results are presented for a study of the spherical fraction of meteoric dust detected in several layers of peatbog core samples taken from a region between the Podkamennaia and Lower Tunguska Rivers in Siberia. The cited dust fraction consists of congealed spherical microparticles with diameters between 21 and 119 microns. The mass and size distributions of the particles are calculated for different time intervals, and most of them are shown to have diameters of 35 to 63 microns. It is found that the total influx of such matter over the whole surface of the earth has not changed very much in the past 250 years. The total accretion rate is estimated to be between 2000 and 4000 tons per year.
Apanasenko V. V.
Boiarkina A. P.
Efremov Vladimir N.
Nazarenko M. K.
Vasilev V. N.
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