Study of the Extraterrestrial Materials in Antarctica (VI) : Cosmic Dust Collected from the Glacier Ice of the Meteorite Ice Field, Yamato Mountains

Black spherical microparticles, glassy microparticles and other irregular-shaped particles were collected from the glacier ice, sampled in December 1974, of the Meteorite Ice Field, Yamato Mountains. Their chemical and physical properties were compared with those of previously collected cosmic dust...

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Bibliographic Details
Main Authors: Sadayo YABUKI, Keizo YANAI, Makoto SHIMA
Format: Article in Journal/Newspaper
Language:English
Published: National Institute of Polar Research 1976
Subjects:
geo
Online Access:https://doi.org/10.15094/00007877
https://doaj.org/article/d0472488a0914bb7bf6cd5f31859ba58
Description
Summary:Black spherical microparticles, glassy microparticles and other irregular-shaped particles were collected from the glacier ice, sampled in December 1974, of the Meteorite Ice Field, Yamato Mountains. Their chemical and physical properties were compared with those of previously collected cosmic dust at various places in the world, and the relationship of these particles to the Yamato meteorites fall was also studied. Any specific particles associated with the Yamato meteorites were not confirmed. The annual accretion rate of black spherical microparticles on the whole earth is estimated at 2.9 to 5.0×l0^4t/year. This value agrees with the annual fall rate of cosmic dust collected from the Antarctic ice near Syowa Station.