|
Northwest Africa 11996 | |||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 11996 This is an OFFICIAL meteorite name. Abbreviation: NWA 11996 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: 960 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 651 approved meteorites (plus 1 unapproved name) classified as CO3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 9 Oct 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11996 (NWA 11996) (Northwest Africa) Purchased: 2017 Apr Classification: Carbonaceous chondrite (CO3) History: Bought from an African mineral dealer in Alicante, Spain Petrography: (K. Metzler, IfP) Chondrules, chondrule fragments, and CAIs, embedded in a fine-grained brownish matrix (about 20 vol% matrix). The vast majority of chondrules belong to chemical type I. Mean apparent chondrule size: 180 ±120 µm (70-930 µm; n=95). Geochemistry: Mineral compositions and geochemistry: Random measurements of olivine grains revealed Fa36.0±8.0 (Fa6.0-40.5); n=25. Random measurements of low-Ca pyroxene grains revealed Fs5.7±3.1Wo2.8±1.4 (Fs2.0-14.0Wo1.0-5.0); n=21. Classification: CO chondrite based on CAI occurrence, small chondrule size, chondrule-matrix ratio, and mineral chemistry. Petrologic type 3.7 estimated from chemical variation of olivine and pyroxene (PMD-Fa = 22.2). | ||||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||
Institutions and collections |
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012) |
||||||||||||||||||||||||||||||
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.
|