|
Northwest Africa 1923 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 1923 This is an OFFICIAL meteorite name. Abbreviation: NWA 1923 Observed fall: No Year found: 2003 Country: Morocco Mass: 112 g | ||||||||||||||
Classification history: |
This is 1 of 603 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||
Comments: | Approved 3 Feb 2006 | ||||||||||||||
Writeup |
Writeup from MB 90:
Northwest Africa 1923 Morocco Find: March 2003 Achondrite (eucrite, gabbroic) History: DGregory purchased an extremely fresh, unbrecciated stone weighing 112 g with black fusion crust from a Moroccan dealer in March 2003. Petrography: (A. Irving and S. Kuehner, UWS) Coarse-grained, noncumulus, igneous texture with primary grain contacts. Subequal amounts anorthite and pale yellow pigeonite with minor chromite. Geochemistry: Anorthite (An95); low-Ca pyroxene grains consist of orthopyroxene (Fs37.8Wo2.9; FeO/MnO = 25.8) with sparse blades of exsolved clinopyroxene (Fs16.3Wo43.2; FeO/ MnO = 23.8). Classification: Achondrite (eucrite, gabbroic). Specimens: A 20.4 g type specimen and one polished thin section are on deposit at UWS. DGregory holds the main mass. | ||||||||||||||
Data from: MB90 Table 2 Line 8: |
|
||||||||||||||
Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
||||||||||||||
Catalogs: |
| ||||||||||||||
References: | Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
| ||||||||||||||
Geography: |
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||
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.
|