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A Direct Measurement of the Terrestrial Mass Accretion Rate of Cosmic Dust
Abstract
The mass of extraterrestrial material accreted by the Earth as submillimeter particles has not previously been measured with a single direct and precise technique that samples the particle sizes representing most of that mass. The flux of meteoroids in the mass range 10 –9 to 10 –4 grams has now been determined from an examination of hypervelocity impact craters on the space-facing end of the Long Duration Exposure Facility satellite. The meteoroid mass distribution peaks near 1.5 × 10 –5 grams (200 micrometers in diameter), and the small particle mass accretion rate is (40 ± 20) × 10 6 kilograms per year, higher than previous estimates but in good agreement with total terrestrial mass accretion rates found by geochemical methods. This mass input is comparable with or greater than the average contribution from extraterrestrial bodies in the 1-centimeter to 10-kilometer size range.
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Cites
Cometary Delivery of Organic Molecules to the Early Earth
Chyba, C. F., Thomas, P. J., Brookshaw, L., & Sagan, C. (1990) · Science · doi:10.1126/science.11538074 · Cited by 577
Pre-biotic organic matter from comets and asteroids
Anders, E. (1989) · Nature · doi:10.1038/342255a0 · Cited by 421
Cited by
Burton, A. S., Stern, J. C., Elsila, J. E., Glavin, D. P., & Dworkin, J. P. (2012) · Chemical Society Reviews · doi:10.1039/c2cs35109a · Cited by 398
A Hydrogen-Rich Early Earth Atmosphere
Tian, F., Toon, O. B., Pavlov, A. A., & De Sterck, H. (2005) · Science · doi:10.1126/science.1106983 · Cited by 390
The marine osmium isotope record
Peucker‐Ehrenbrink, B., & Ravizza, G. (2000) · Terra Nova · doi:10.1046/j.1365-3121.2000.00295.x · Cited by 371
The Mesosphere and Metals: Chemistry and Changes
Plane, J. M. C., Feng, W., & Dawkins, E. C. M. (2015) · Chemical Reviews · doi:10.1021/cr500501m · Cited by 344
The Search for Chiral Asymmetry as a Potential Biosignature in our Solar System
Glavin, D. P., Burton, A. S., Elsila, J. E., Aponte, J. C., & Dworkin, J. P. (2020) · Chemical Reviews · doi:10.1021/acs.chemrev.9b00474 · Cited by 293
Metadata
- Authors
- Love, S. G., & Brownlee, D. E.
- Venue
- Science
- Published
- 1993-10-22
- Volume
- 262
- Issue
- 5133
- Pages
- 550-553
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2014239858
- Cited by
- 879
- References
- 2
- FWCI
- 17.98
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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