![]() |
||
|
Northwest Africa 3212 | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 3212 This is an OFFICIAL meteorite name. Abbreviation: NWA 3212 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 587 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 8 Sep 2008 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 94:
Northwest Africa 3212 Northwest Africa Find: 2005 Achondrite (eucrite) History: A single stone of 176.6 g was found purchased in 2005 in Erfoud by M. Chinellato. Physical characteristics: The sample displays no fusion crust. Petrography: (V. Moggi Cecchi, G. Pratesi, MSP) A polymict breccia consisting of basaltic and mineral clasts set into a fine-grained matrix of exsolved pyroxene, clinopyroxene and plagioclase. The large clasts are predominantly plagioclase and exsolved pyroxene, with minor clinopyroxene. Silica and spinel ilmenite, and Al-Ti-chromite are commonly minor phases. Exsolution lamellae in pyroxene are very fine (1–2 μm width). Geochemistry: Plagioclase An89.4; pyroxene ranges Fs35.6–54.1, En37.4–43.9, Wo2.0–29.2. Oxygen isotopes (I. A. Franchi, R. Greenwood, OU) δ17O = 1.74‰, δ18O = 3.84‰, Δ17O = -0.26‰. Classification: Achondrite (eucrite) with moderate degree of shock and low degree of weathering. Possibly paired with NWA 3211. Type specimens: A total of 20 g specimen and one thin section are on deposit at MSP, Prato. MChin holds the main mass. | ||||||||||||||||||||||||
Data from: MB94 Table 2 Line 5: |
|
||||||||||||||||||||||||
Plots: | O isotopes: | ||||||||||||||||||||||||
Institutions and collections |
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022) OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011) MChin: Matteo Chinellato, Via Triestina, 126/A-30030 Tessera, Venezia, Italy; Website (private address) |
||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
| ||||||||||||||||||||||||
Photos: |
| ||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |