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Northwest Africa 7767
Basic information Name: Northwest Africa 7767
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7767
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 72.1 g
Meteoritical Bulletin:  MB 104  (2015)  L-melt rock
Recommended:  L-melt rock    [explanation]

This is 1 of 47 approved meteorites classified as L-melt rock.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Mar 2015
Writeup from MB 104:

Northwest Africa 7767 (NWA 7767)

(Northwest Africa)

Purchased: 2011

Classification: Ordinary chondrite (L, melt rock)

History: Purchased by Nicola Castellano at the Torino Mineral Show, Italy.

Physical characteristics: A single piece weighing 31 g, partially covered with fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP); The thin section displays two lithologies: an equilibrated chondritic one and a melted one. The chondritic portion has a fine-grained matrix dominated by olivine, plagioclase, and orthopyroxene. Opaque phases are metal and troilite. The melted portion shows diffuse melt features such as metal veins, μm-sized metal grains and glass.

Geochemistry: Olivine (Fa24.5, N = 20), orthopyroxene (Fs20.8En78.0Wo1.2).

Classification: Ordinary chondrite (L-melt rock).

Specimens: A total of 14.62 g of sample, one polished thin section and a block are on deposit at MSP (MSP 5235). Castellano holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Torino
Date:P 2011
Mass (g):72.1
Class:L-melt rock
Shock stage:S3
Weathering grade:W0
Fayalite (mol%):24.45
Ferrosilite (mol%):20.76
Wollastonite (mol%):1.23
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, MSP
Type spec mass (g):14.62
Type spec location:MSP
Main mass:Castellano
Comments:Inv. # MSP 5235; submitted by Vanni Moggi Cecchi
   and collections
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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