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Vertaling bekijkenNWA 869 Meteoriet, L3-6. De bekendste chondriet. - 47.71 g
Nr. 89685089
Northwest Africa 869
Find: 2000 or 2001
Physical characteristics: Most samples are individual meteorites but some fragments (mostly >1 kg) also occur. In most cases the fusion crust has been polished or ablated by wind erosion. Many samples are more severely affected and show faces with deep wind erosion features. Fracture faces, formed by ground collision, show a typical gray-green color and sometimes visible brecciation (light and/or dark clasts). Due to the coarseness of this breccia, there are some stones that consist of only a single lithology.
Petrography: This chondritic breccia consists of about 75 vol% matrix with unequilibrated and equilibrated L-chondrite clasts (up to 5.5 cm), some of which display shock-darkening. Impact melt-rock clasts, themselves either clast-free or clast-poor, also occur and are strongly depleted in Fe,Ni metal and sulfide.
Geochemistry: Northwest Africa 869 is a regolith breccia, containing solar noble gases and preirradiated lithologies. Olivine in lithic clasts: Fa0.2-49.2; olivine in matrix: Fa10.3-29.3; low-Ca pyroxene in lithic clasts: Fs2.1-35.9; low-Ca pyroxene in matrix: Fs7.0-23.9. Bulk oxygen isotopes: δ17O = 3.52; δ18O = 4.67; Δ17O = 1.09 per mil. Terrestrial age: 4.4 ± 0.7 ka. Preatmospheric meteoroid size and mass: 225 ± 25 cm, 120-230 T.
Classification: Because NWA 869 contains unequilibrated clasts, its classification is revised to L3-6.
This lot comes with certificate of authenticity.
Thanks for your interest.
Northwest Africa 869
Find: 2000 or 2001
Physical characteristics: Most samples are individual meteorites but some fragments (mostly >1 kg) also occur. In most cases the fusion crust has been polished or ablated by wind erosion. Many samples are more severely affected and show faces with deep wind erosion features. Fracture faces, formed by ground collision, show a typical gray-green color and sometimes visible brecciation (light and/or dark clasts). Due to the coarseness of this breccia, there are some stones that consist of only a single lithology.
Petrography: This chondritic breccia consists of about 75 vol% matrix with unequilibrated and equilibrated L-chondrite clasts (up to 5.5 cm), some of which display shock-darkening. Impact melt-rock clasts, themselves either clast-free or clast-poor, also occur and are strongly depleted in Fe,Ni metal and sulfide.
Geochemistry: Northwest Africa 869 is a regolith breccia, containing solar noble gases and preirradiated lithologies. Olivine in lithic clasts: Fa0.2-49.2; olivine in matrix: Fa10.3-29.3; low-Ca pyroxene in lithic clasts: Fs2.1-35.9; low-Ca pyroxene in matrix: Fs7.0-23.9. Bulk oxygen isotopes: δ17O = 3.52; δ18O = 4.67; Δ17O = 1.09 per mil. Terrestrial age: 4.4 ± 0.7 ka. Preatmospheric meteoroid size and mass: 225 ± 25 cm, 120-230 T.
Classification: Because NWA 869 contains unequilibrated clasts, its classification is revised to L3-6.
This lot comes with certificate of authenticity.
Thanks for your interest.
- 198
- 3
- 0
All perfect.
Vertaling bekijkenWonderful transaction, beautiful pieces, great seller!
Vertaling bekijkenDziękuję za ekspresową dostawę
Vertaling bekijkenThanks very muchfir zending the stone
Vertaling bekijkenAlways very nice specimens, good price, good service!
Vertaling bekijkenFast shipping , item as described thank you.
Vertaling bekijkenDie Lieferung erfolgte zeitnah. Das angebotene Zertifikat für das Produkt fehlt! Somit ist das Produkt nicht vollständig.
Vertaling bekijkenParfait. Merci.
Vertaling bekijkenbien emballé bien reçu je suis satisfaite MERCI
Vertaling bekijkenGreat quality. Thank you for the good care! kind regards. David van Ooijen
Vertaling bekijkenFast delivery, very well packaged. Quality of product as promised. Very satisfied with purchase.
Vertaling bekijkenEnvoi très rapide, vendeur très professionnel. Je recommande vivement!
Vertaling bekijkenAll perfect. 100% professionnal.
Vertaling bekijkenPerfectly package, the meteorites are beautiful and very clean , all good thank you
Vertaling bekijkenExcelente!!
Vertaling bekijkenNice object and it was very well packed
Vertaling bekijkenEverything arrived very good item as described thank you.
Vertaling bekijkenAll as described.
Vertaling bekijkenJe recommande, merci 👌🏻
Vertaling bekijkenExcelent very good very recommened++++ Muy recomendado+++
Vertaling bekijkenVery happy with this very nice specimen!
Vertaling bekijkengreat seller
Vertaling bekijkenEverything went smoothly, extremly fast shipping
Vertaling bekijken- 198
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Muy contento con el vendedor, envío rápido, embalaje perfecto y articulo idéntico al de las fotos. Repetiría sin dudarlo.
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