8.315g Nakhlite, Martian Meteorite, NWA 13669
On Offer: 8.315g Nakhlite, Martian Meteorite, NWA 13669
Class: Martian Meteorite (Nakhlite)
Subclass: Nakhlite
Origin: MARS
Official name: NWA 13669
Description: A 8.315 gram piece of Mars. This is a martian meteorite, ejected by a meteorite impacting the surface of Mars and hurling it to Earth. A lovely 8.315 gram specimen of a very rare member of SNC group of martian meteorites known as "Nakhlite" NWA 13669
What you get: 8.315 gram NWA 13669 Martian Meteorite Specimen as Shown, Membrane Storage/Display Box, signed 5x7 double sided color Certificate of Authenticity
SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW
| Northwest Africa 13669 | |||||
|---|---|---|---|---|---|
| Basic information |
Name: Northwest Africa 13669 This is an OFFICIAL meteorite name. Abbreviation: NWA 13669 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: 139.2 g |
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| Classification history: |
This is 1 of 23 approved meteorites classified as Martian (nakhlite). |
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| Comments: | Approved 18 Jan 2021 | ||||
| Writeup |
Writeup from MB 110:
Northwest Africa 13669 (NWA 13669) (Northwest Africa) Purchased: 2020 Dec Classification: Martian meteorite (Nakhlite) History: Purchased in December 2020 by Said Yousfi from a dealer near the Morocco-Algeria border and then acquired jointly by Mendy Ouzillou and Dustin Dickens. Physical characteristics: This somewhat friable specimen was found in several pieces (total weight 139.2 g, comprising stones of 66.1 g and 21.4 g plus other smaller fragments). The two larger stones are partially covered by black fusion crust as are some of the fragments. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen has a cumulate texture with a mean grainsize of ~1.2 mm. It is composed of zoned augite, olivine, zoned ferropigeonite (with ferrosilite rims) and plagioclase together with accessory titanomagnetite (with octahedral ilmenite exsolution lamellae), chlorapatite, pyrrhotite and intercumulus mesostasis (consisting of K-rich glass with ferropigeonite microlites plus subhedral grains of titanomagnetite and chlorapatite). Olivine contains veinlets of very fine grained, inhomogeneous Fe-rich "iddingsitic" material with oxide sums ~89 wt.%, and augite contains rare glassy melt inclusions (surrounded by radial cracks). Geochemistry: Augite (Fs22.8-37.6Wo40.5-34.9, FeO/MnO = 31-35, N = 5), olivine (Fa72.3-74.5, FeO/MnO = 47-48, N = 3), ferropigeonite (Fs56.4-61.8Wo11.6-6.5, FeO/MnO = 33-34, N = 2), ferrosilite rim (Fs70.9Wo3.0, FeO/MnO = 34), plagioclase (An34. |
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