Österplana 065 (Öst 65)

[karmaka]

Etwas Neues zu Österplana 065:

A new type of solar-system material recovered from Ordovician marine limestone

B. Schmitz, Q. -Z. Yin,   M. E. Sanborn,M. Tassinari,C. E. Caplan   & G. R. Huss   

Nature Communications7,
Article number:ncomms11851
doi:10.1038/ncomms11851
Published 14 June 2016

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"From mid-Ordovician ~470 Myr-old limestone >100 fossil L-chondritic meteorites have been recovered, representing the markedly enhanced flux of meteorites to Earth following the breakup of the L-chondrite parent body. Recently one anomalous meteorite, Österplana 065 (Öst 65), was found in the same beds that yield L chondrites. The cosmic-ray exposure age of Öst 65 shows that it may be a fragment of the impactor that broke up the L-chondrite parent body. Here we show that in a chromium versus oxygen-isotope plot Öst 65 falls outside all fields encompassing the known meteorite types. This may be the first documented example of an ‘extinct’ meteorite, that is, a meteorite type that does not fall on Earth today because its parent body has been consumed by collisions. The meteorites found on Earth today apparently do not give a full representation of the kind of bodies in the asteroid belt ~500 Myr ago."

[Shemesh]

Hier noch ein Bericht zu diesem fossilen Meteoriten:

http://www.geologypage.com/2017/01/rare-meteorites-challenge-understanding-solar-system.html#ixzz4WiRV5m51

Kennt ihr andere Meteoriten dieser art? Wüsste nicht nach was suchen in Metbul...
Und zudem: Metbul bezeichnet Österpkana 065 als 'Relict' aber versteht unter "Relict" eher Mineralien die sich aufgrund von Mets gebildet haben. Und nicht die versteinerung von rein extraterrestrischem Material - was der Österplana ja ist.