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dc.contributor.authorRudraswami, N.G.
dc.contributor.authorFernandes, Dafilgo
dc.contributor.authorPandey, M.
dc.date.accessioned2020-12-31
dc.date.accessioned2021-02-09T10:13:10Z
dc.date.available2020-12-10
dc.date.available2021-02-09T10:13:10Z
dc.date.issued2020
dc.identifier.citationMeteoritics and Planetary Science, vol.55(10); 2020; 2256-2266
dc.identifier.issn1086-9379
dc.identifier.otherhttps://onlinelibrary.wiley.com/doi/10.1111/maps.13574
dc.identifier.urihttps://doi.org/10.1111/maps.13574
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/8376
dc.descriptionIF2019 - 2.863
dc.description.abstractMicrometeorites (MMs) are extraterrestrial dust particles, in the size range of tens of �m to mm, recovered from the Earth�s surface primarily from deep-sea sediments, Antarctica, and also from space. The present collection of MMs (>50��m) obtained by melting ~50�t of ice near the Maitri station, Antarctica, has allowed us to investigate the abundance and properties of the particles by an unbiased collection technique. The collection reveals a large quantity of extraterrestrial material in the ~80-140��m size range. Previous collections have shown an abundance of particles at diameter ~200��m, which is in contrast to our findings. This can either be explained by movement of material within the ice or a recent influx of smaller particles. The smaller particles (<80��m) typically undergo atmospheric entry heating, contrary to earlier observations, which have suggested that they reach the Earth�s surface unmelted. Chondrules and refractory inclusions are rare in the collected MMs indicating that their contribution is only a small percentage. The Maitri station collection does not have a well-constrained ice accumulation rate and terrestrial age. Nevertheless, based on matching the previous well-documented flux calculation of Antarctica, we suggest a slow ice accumulation rate of <1.0�g�cm-2�yr-1 near Maitri station.
dc.languageen
dc.publisherUniversity of Arkansa
dc.relation.ispartofMeteorit Planet Sci
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleProbing the nature of extraterrestrial dust reaching the Earth�s surface collected from the Maitri station, Antarctica
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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