|
Northwest Africa 11947 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 11947 This is an OFFICIAL meteorite name. Abbreviation: NWA 11947 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 70 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 595 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 15 Sep 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11947 (NWA 11947) (Northwest Africa) Purchased: 2018 Classification: HED achondrite (Eucrite) History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco. Physical characteristics: Dark greyish individual with some fusion crust. Petrography: The meteorite is a coarse-grained breccia composed of up to 1 cm sized basaltic clasts set into a clastic matrix. Mineral phases are predominantly up to 1 mm sized pyroxene and lath shaped calcic plagioclase. Pyroxene is compositionally zoned with rims being more Fe- and Ca-rich than cores indicating a low degree of thermal metamorphism. Minor phases include silica, ilmenite, chromite, troilite, zircon and fayalite. No metallic iron has been detected. Geochemistry: pyroxene cores: Fs34.2±4.4Wo9.3±3.1 (Fs30.0-40.1Wo6.7-14.3, n=12, FeO/MnO=26-30); pyroxene rims: Fs60.7±6.7Wo24.5±3.2 (Fs42.0-66.2Wo20.5-30.4, n=12, FeO/MnO=29-41); calcic plagioclase: An85.5±2.5 (An81.0-88.7, n=13) | ||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
|
||||||||||||||||||||||||||||
Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) Stehlik: Harald Stehlik, 1220 Wien, Austria (private address) |
||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|