An Archaean heavy bombardment from a destabilized extension of the asteroid belt

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10129176" target="_blank" >RIV/00216208:11320/12:10129176 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1038/nature10967" target="_blank" >http://dx.doi.org/10.1038/nature10967</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/nature10967" target="_blank" >10.1038/nature10967</a>

Result language
angličtina
Original language name
An Archaean heavy bombardment from a destabilized extension of the asteroid belt
Original language description
The barrage of comets and asteroids that produced many young lunar basins (craters over 300 kilometres in diameter) has frequently been called the Late Heavy Bombardment(1) (LHB). Many assume the LHB ended about 3.7 to 3.8 billion years (Gyr) ago with the formation of Orientale basin(2,3). Evidence for LHB-sized blasts on Earth, however, extend into the Archaean and early Proterozoic eons, in the form of impact spherule beds: globally distributed ejecta layers created by Chicxulub-sized or larger cratering events(4). At least seven spherule beds have been found that formed between 3.23 and 3.47 Gyr ago, four between 2.49 and 2.63 Gyr ago, and one between 1.7 and 2.1 Gyr ago(5-9). Here we report that the LHB lasted much longer than previously thought, with most late impactors coming from the E belt, an extended and now largely extinct portion of the asteroid belt between 1.7 and 2.1 astronomical units from Earth. This region was destabilized by late giant planet migration(10-13). E-belt
Czech name
—
Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Project
<a href="/en/project/GA205%2F08%2F0064" target="_blank" >GA205/08/0064: The Yarkovsky and YORP effects in translational and rotational dynamics of asteroids</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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