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A fossil winonaite-like meteorite in Ordovician limestone: A piece of the impactor that broke up the L-chondrite parent body?

Schmitz, Birger LU ; Huss, Gary R.; Meier, Matthias LU ; Peucker-Ehrenbrink, Bernhard; Church, Ross LU ; Cronholm, Anders LU ; Davies, Melvyn B LU ; Heck, Philipp R.; Johansen, Anders LU and Keil, Klaus, et al. (2014) In Earth and Planetary Science Letters 400. p.145-152
Abstract
About a quarter of all meteorites falling on Earth today originate from the breakup of the L-chondrite parent body similar to 470 Ma ago, the largest documented breakup in the asteroid belt in the past similar to 3 Ga. A window into the flux of meteorites to Earth shortly after this event comes from the recovery of about 100 fossil L chondrites (1-21 cm in diameter) in a quarry of mid-Ordovician limestone in southern Sweden. Here we report on the first non-L-chondritic meteorite from the quarry, an 8 cm large winonaite-related meteorite of a type not known among present-day meteorite falls and finds. The noble gas data for relict spinels recovered from the meteorite show that it may be a remnant of the body that hit and broke up the... (More)
About a quarter of all meteorites falling on Earth today originate from the breakup of the L-chondrite parent body similar to 470 Ma ago, the largest documented breakup in the asteroid belt in the past similar to 3 Ga. A window into the flux of meteorites to Earth shortly after this event comes from the recovery of about 100 fossil L chondrites (1-21 cm in diameter) in a quarry of mid-Ordovician limestone in southern Sweden. Here we report on the first non-L-chondritic meteorite from the quarry, an 8 cm large winonaite-related meteorite of a type not known among present-day meteorite falls and finds. The noble gas data for relict spinels recovered from the meteorite show that it may be a remnant of the body that hit and broke up the L-chondrite parent body, creating one of the major asteroid families in the asteroid belt. After two decades of systematic recovery of fossil meteorites and relict extraterrestrial spinel grains from marine limestone, it appears that the meteorite flux to Earth in the mid-Ordovician was very different from that of today. (C) 2014 The Authors. Published by Elsevier B.V. (Less)
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keywords
fossil meteorite, asteroid breakup, winonaite, ordinary chondrite, asteroid family, meteorite flux
in
Earth and Planetary Science Letters
volume
400
pages
145 - 152
publisher
Elsevier
external identifiers
  • wos:000339036800015
  • scopus:84901951646
ISSN
1385-013X
DOI
10.1016/j.epsl.2014.05.034
language
English
LU publication?
yes
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b643d3e2-8bf5-4ff6-ae62-9430a6ecc0a8 (old id 4591800)
date added to LUP
2014-09-08 08:51:46
date last changed
2017-09-24 03:05:06
@article{b643d3e2-8bf5-4ff6-ae62-9430a6ecc0a8,
  abstract     = {About a quarter of all meteorites falling on Earth today originate from the breakup of the L-chondrite parent body similar to 470 Ma ago, the largest documented breakup in the asteroid belt in the past similar to 3 Ga. A window into the flux of meteorites to Earth shortly after this event comes from the recovery of about 100 fossil L chondrites (1-21 cm in diameter) in a quarry of mid-Ordovician limestone in southern Sweden. Here we report on the first non-L-chondritic meteorite from the quarry, an 8 cm large winonaite-related meteorite of a type not known among present-day meteorite falls and finds. The noble gas data for relict spinels recovered from the meteorite show that it may be a remnant of the body that hit and broke up the L-chondrite parent body, creating one of the major asteroid families in the asteroid belt. After two decades of systematic recovery of fossil meteorites and relict extraterrestrial spinel grains from marine limestone, it appears that the meteorite flux to Earth in the mid-Ordovician was very different from that of today. (C) 2014 The Authors. Published by Elsevier B.V.},
  author       = {Schmitz, Birger and Huss, Gary R. and Meier, Matthias and Peucker-Ehrenbrink, Bernhard and Church, Ross and Cronholm, Anders and Davies, Melvyn B and Heck, Philipp R. and Johansen, Anders and Keil, Klaus and Kristiansson, Per and Ravizza, Greg and Tassinari, Mario and Terfelt, Fredrik},
  issn         = {1385-013X},
  keyword      = {fossil meteorite,asteroid breakup,winonaite,ordinary chondrite,asteroid family,meteorite flux},
  language     = {eng},
  pages        = {145--152},
  publisher    = {Elsevier},
  series       = {Earth and Planetary Science Letters},
  title        = {A fossil winonaite-like meteorite in Ordovician limestone: A piece of the impactor that broke up the L-chondrite parent body?},
  url          = {http://dx.doi.org/10.1016/j.epsl.2014.05.034},
  volume       = {400},
  year         = {2014},
}