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Northwest Africa 11398 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11398 This is an OFFICIAL meteorite name. Abbreviation: NWA 11398 Observed fall: No Year found: 2016 Country: Algeria Mass: 340 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 628 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 15 Aug 2017 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 106:
Northwest Africa 11398 (NWA 11398) Algeria Purchased: 2016 Aug Classification: Carbonaceous chondrite (CV3) History: Purchased from Abdeltif Mechaguen in Mauritania in August 2016. Physical characteristics: The 27 g specimen is unfractured, with homogeneous appearance, no fusion crust, having rounded and rough surfaces. Petrography: Around twenty AOA were observed at each cm2 with size 0.35 -1.6 mm. Several CAIs were also present, together comprising 22% of the sample. Chondrules with roughly the same spatial density as the CAIs are present, average size 0.8 mm (0.3-1.9 mm, 34% of the sample); matrix is about 45%. Main minerals: olivine and pyroxene, with accessories feldspar, melilite, spinel, and perovskite. void-filling alteration products: iron oxides, carbonates (calcite, ankerite, siderite-rhodocrosite), sulfates (barite, mixed coelestine); opaque minerals <3% in the sample: troilite, pentlandite, magnetite. At the S3 shock level the minerals are fractured and mechanical twins are present in pyroxenes, but the olivines do not show mosaicism. 70-90% of troilite and metal in opaque chondrules are oxidized, opaque veins are transformed to iron oxides (W3). Geochemistry: Fa8.2±6.7 (Fa0-26.1, N=44), Fs7.7±8.1Wo30.9±8.1 (Fs2.6-29.0Wo13.5-41.0, N=13) Classification: CV3, S2 Specimens: Many specimens, in all 340 g. 27 g at CSFK, remainider with owner Zs. Kereszty, private collection. | ||||||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
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Institutions and collections |
CSFK: Research Center for Astronomy and Earth Sciences, H-1121 Budapest, Konkoly Thege Miklós út 15-17.l Hungary, Hungary (institutional address; updated 7 Apr 2015) |
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Catalogs: |
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References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography: |
Statistics: This is 1 of 1336 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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