31.09g LL3.5 Type 3 Chondrite End Piece
| Northwest Africa 7981 | |||||||||||||||||||||||||||||
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| Basic information |
Name: Northwest Africa 7981 This is an OFFICIAL meteorite name. Abbreviation: NWA 7981 Observed fall: No Year found: 2013 Country: Morocco Mass:  110.9 g |
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| Classification history: |
This is 1 of 22 approved meteorites classified as LL3.5. |
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| Comments: | Approved 12 Sep 2013 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 102:
Northwest Africa 7981 (NWA 7981) Morocco Purchased: 2013 Classification: Ordinary chondrite (LL3.5) History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to Sean Tutorow for classification, 2012. Physical characteristics: Single stone, dark weathered fusion crust, saw cut reveals many chondrules of variable size, some up to 5 mm, set in a reddish brown matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated porphyritic chondrules, most with glass or mesostasis. Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa26.8±8.5, Fe/Mn=73±21, Cr2O3=0.08±0.19 wt%, range Cr2O3=0.01-0.96 wt%, CaO=0.08±0.06 wt%, n=29; low-Ca pyroxene Fs20.0±7.5Wo2.7±2.8, Fe/Mn=31±18, n=17. Classification: Ordinary chondrite (LL3.5). Weathering grade W2. Specimens: 20.9 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. |
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| Data from: MB102 Table 0 Line 0: |
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| Institutions and collections |
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; (institutional address; updated 12 Feb 2015) | ||||||||||||||||||||||||||||
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