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First known Terrestrial Impact of a Binary Asteroid from a Main Belt Breakup Event

Ormoe, Jens; Sturkell, Erik; Alwmark, Carl LU and Melosh, Jay (2014) In Scientific Reports 4.
Abstract
Approximately 470 million years ago one of the largest cosmic catastrophes occurred in our solar system since the accretion of the planets. A 200-km large asteroid was disrupted by a collision in the Main Asteroid Belt, which spawned fragments into Earth crossing orbits. This had tremendous consequences for the meteorite production and cratering rate during several millions of years following the event. The 7.5-km wide Lockne crater, central Sweden, is known to be a member of this family. We here provide evidence that Lockne and its nearby companion, the 0.7-km diameter, contemporaneous, Malingen crater, formed by the impact of a binary, presumably 'rubble pile' asteroid. This newly discovered crater doublet provides a unique reference for... (More)
Approximately 470 million years ago one of the largest cosmic catastrophes occurred in our solar system since the accretion of the planets. A 200-km large asteroid was disrupted by a collision in the Main Asteroid Belt, which spawned fragments into Earth crossing orbits. This had tremendous consequences for the meteorite production and cratering rate during several millions of years following the event. The 7.5-km wide Lockne crater, central Sweden, is known to be a member of this family. We here provide evidence that Lockne and its nearby companion, the 0.7-km diameter, contemporaneous, Malingen crater, formed by the impact of a binary, presumably 'rubble pile' asteroid. This newly discovered crater doublet provides a unique reference for impacts by combined, and poorly consolidated projectiles, as well as for the development of binary asteroids. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Scientific Reports
volume
4
publisher
Nature Publishing Group
external identifiers
  • wos:000343595600001
  • pmid:25340551
  • scopus:84961290850
ISSN
2045-2322
DOI
10.1038/srep06724
language
English
LU publication?
yes
id
3f6cbd20-e929-44bb-8c87-0f8453d12f31 (old id 4780772)
date added to LUP
2014-11-20 09:27:26
date last changed
2017-01-01 06:10:14
@article{3f6cbd20-e929-44bb-8c87-0f8453d12f31,
  abstract     = {Approximately 470 million years ago one of the largest cosmic catastrophes occurred in our solar system since the accretion of the planets. A 200-km large asteroid was disrupted by a collision in the Main Asteroid Belt, which spawned fragments into Earth crossing orbits. This had tremendous consequences for the meteorite production and cratering rate during several millions of years following the event. The 7.5-km wide Lockne crater, central Sweden, is known to be a member of this family. We here provide evidence that Lockne and its nearby companion, the 0.7-km diameter, contemporaneous, Malingen crater, formed by the impact of a binary, presumably 'rubble pile' asteroid. This newly discovered crater doublet provides a unique reference for impacts by combined, and poorly consolidated projectiles, as well as for the development of binary asteroids.},
  articleno    = {6724},
  author       = {Ormoe, Jens and Sturkell, Erik and Alwmark, Carl and Melosh, Jay},
  issn         = {2045-2322},
  language     = {eng},
  publisher    = {Nature Publishing Group},
  series       = {Scientific Reports},
  title        = {First known Terrestrial Impact of a Binary Asteroid from a Main Belt Breakup Event},
  url          = {http://dx.doi.org/10.1038/srep06724},
  volume       = {4},
  year         = {2014},
}