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| Northwest Africa 10881 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 10881 This is an OFFICIAL meteorite name. Abbreviation: NWA 10881 Observed fall: No Year found: 2015 Country: (Northwest Africa) Mass:  835 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 22 approved meteorites classified as CO3.0. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 1 Jul 2017 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 106:
Northwest Africa 10881 (NWA 10881) (Northwest Africa) Purchased: 2015 Classification: Carbonaceous chondrite (CO3.0) History: Purchased by Mohammed Hmani in 2015. Physical characteristics: Single stone. Weathered fusion crust exterior. A saw cut reveals many very small chondrules and a few small CAIs set in a dark brown matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous chondrules, many fragmental or irregular, most in the size range 50-200 μm. Scattered matrix olivines and CAIs were observed throughout. Fine grained matrix makes up approximately 50% of this meteorite. The metal abundance is low. The CAIs are small and scattered. Geochemistry: (C. Agee and M. Spilde, UNM) All olivine Fa11.0±15.3, n=30; coarse ferroan olivine Fa28.7±11.6, Fe/Mn=119±66, Cr2O3=0.38±0.08 (wt%), n=11; enstatite Fs2.4±1.9Wo1.3±0.7, n=8; diopside Fs3.6±3.8Wo41.4±6.0, n=3; (K. Ziegler, UNM) Oxygen isotope mean values of analyses on 3 acid-washed fragments of bulk sample, 1.2, 1.5, 1.5 mg, gave δ17O= -7.053, -4.062, -4.822, δ18O= -2.269, 1.814, -0.062, Δ17O= -5.855, -5.020, -4.789, (linearized, all permil). One of the fragments had O-isotopes near the CO field, the other two were more in the CV/CK field. Classification: Carbonaceous chondrite (CO3.0), type 3.0 based on mean value and sigma of Cr2O3 in ferroan olivine (Grossman and Brearley, 2005), the values are similar to ALHA77307. Specimens: 29.8 g including a probe mount on deposit at UNM, Mohammed Hmani holds the main mass. | ||||||||||||||||||||||||||||||
| Bibliography: |
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| Data from: MB106 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||
| Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address) |
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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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| Photos: |
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| Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
| Crosslinks: |
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| Revision history: |
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