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2015 | 6 | 23-25
Article title

Kopalne ordowickie chondryty – przegląd danych

Title variants
Fossil ordovician chondrites – a review
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The largest group of fossil meteorites are L type chondrites, found in the Middle Ordovician limestones in Sweden. Until now, 101 specimes were discovered. Probably, they come from collisions in the asteroid belt. They are completely altered, except the chromite grains.
Physical description
  • Uniwersytet Śląski, Wydział Nauk o Ziemi
  • Uniwersytet Śląski, Wydział Nauk o Ziemi
  • Bogard D.D., 2011, K–Ar ages of meteorites: clues to parent-body thermal histories, Chem. Erde – Geochem., 71, s. 207–226.
  • Cronholm A., Schmitz B., 2010, Extraterrestrial chromite distribution across the mid-Ordovician Puxi River section, central China: evidence for a global major spike in flux of L-chondritic matter, Icarus, 208, s. 36–48.
  • Heck P.R., Schmitz B., Baur H., Wieler R., 2008, Noble gases in fossil micrometeorites and meteorites from 470Myr old sediments from southern Sweden and new evidence for the L chondrite parent body breakup event, Meteorit. Planet. Sci., 43, s. 517–528.
  • Heck P.R., i in., 2010, A single asteroidal source for extraterrestrial Ordovician chromite grains from Sweden and China: high-precision oxygen three-isotope SIMS analyses, Geochim. Cosmochim. Acta, 74, s. 497–509.
  • Kyte F.T., Shukolyukov A., Hildebrand A.R., Lugmair G.W., Hanova J., 2011, Chromium-isotopes in Late Eocene impact spherules indicate a likely asteroid belt provenance, Earth Planet. Sci. Lett., 302, s. 279–286.
  • Lindskog A., Schmitz B., Cronholm A., Dronov A., 2012, A Russian record of a Mid-dle Ordovician meteorite shower: extraterrestrial chromite at Lynna River, St. Petersburg region, Meteorit. Planet. Sci., 47, s. 1274–1290.
  • Schmitz B., 2013, Extraterrestrial spinels and the astronomical perspective on Earth’s geological record and evolution of life, Chem. Erde – Geochem., 73, s. 117–145.
  • Schmitz B., Tassinari M., Peucker-Ehrenbrink B., 2001, A rain of ordinary chondritic meteorites in the early Ordovician, Earth Planet. Sci. Lett., 194, s. 1–15.
  • Schmitz B., Tassinari M., Häggström T., 2003, Sediment-dispersed extraterrestrial chromite traces a major asteroid disruption event, Science, 300, s. 961–964.
  • Schmitz B., i in., 2014, A fossil winonaite-like meteorite in Ordovician limestone: A piece of the impactor that broke up the L-chondrite parent body?, Earth and Planetary Science Letters, 400, s. 145–152.
  • Swindle T.D., Kring D.A., Weirich J.R., 2014, 40Ar/39Ar ages of impacts involving ordinary chondrite meteorites, Geol. Soc. Spec. Publ., 378, s. 333–347.
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