![]() |
||
|
Northwest Africa 12747 | |||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 12747 This is an OFFICIAL meteorite name. Abbreviation: NWA 12747 Observed fall: No Year found: 2006 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 602 approved meteorites (plus 1 unapproved name) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 27 Jul 2019 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 12747 (NWA 12747) (Northwest Africa) Purchased: 2006 June Classification: Carbonaceous chondrite (CV3) History: Purchased from a Moroccan mineral dealer at the meteorite show in Ensisheim, France Petrography: (K. Metzler, IfP) Chondrules, CAIs and AOAs are embedded in a fine-grained dark matrix (about 30 vol% matrix). Most chondrules have apparent diameters between 0.3 and 1.5 mm, some up to 3 mm. No type II chondrules were found. Several chondrules show reddish staining due to terrestrial weathering. CAIs with sizes up to 9 mm. Geochemistry: Mineral compositions and geochemistry: Random measurements of olivine grains revealed Fa4.9±4.0 (0.6-18; n=x); n=23. Random measurements of low-Ca pyroxene grains revealed Fs1.3±0.5 Wo1.1±0.5 (Fs0.5-2.8Wo0.6-3.0; n=22). Classification: CV chondrite based on CAI and AOA occurrence, size of chondrules and CAIs, chondrule-matrix ratio, and mineral chemistry. Petrologic type 3 based on the chemical variation of olivine and pyroxene. | ||||||||||||||||||||||||||||||
Data from: MB108 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
| ||||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |