Meteoritical Bulletin: Entry for Northwest Africa 7116

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Northwest Africa 7116

Basic information

Name: Northwest Africa 7116
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7116
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 12.1 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	EL6
Recommended:			EL6 [explanation]

This is 1 of 129 approved meteorites classified as EL6. [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites

Comments:

Approved 8 Mar 2012

Writeup

help

Writeup from MB 100:

Northwest Africa 7116 (NWA 7116)

(Northwest Africa)

Purchased: 2011

Classification: Enstatite chondrite (EL6)

History: Purchased by Giorgio Tomelleri at a market in Erfoud, Morocco.

Physical characteristics: Seven fragments total 12.1 g, without fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP) The thin section displays rare indistinct chondrules set in a fine-grained matrix, consisting of pyroxene, with minor plagioclase. Several subparallel 200 μm-wide veinlets filled with iron oxides/hydroxides present. Chondrules (0.4 to 0.8 mm) are mainly RP type, with minor GP. Opaque phases are mainly kamacite and troilite, almost completely weathered to iron oxides. Accessory phases are alabandite and daubreelite as blades in troilite. The presence of alabandite, An content of plagioclase and Si content of kamacite point to a classification as EL chondrite.

Geochemistry: Orthopyroxene (Fs_0.8Wo_1.4), plagioclase (An_14.7Or_4.4); Si in kamacite = 0.7 wt.%, Ti in troilite = 5.9 wt.%

Classification: Enstatite chondrite (EL6); S2; W2

Specimens: A total of 12.1 g specimen and one thin section is on deposit at MSP (MSP 5192). An anonymous person holds the main mass.

Data from:
  MB100
  Table 1
  Line 1644:

Place of purchase:	Erfoud
Date:	P 2011
Mass (g):	12.1
Pieces:	1
Class:	EL6
Shock stage:	S2
Weathering grade:	W2
Ferrosilite (mol%):	0.8
Wollastonite (mol%):	1.4
Classifier:	V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP
Type spec mass (g):	2.92
Type spec location:	MSP
Main mass:	Unknown
Finder:	Automatic
Comments:	Inv.# MSP5192; submitted by Vanni Moggi Cecchi

Institutions
and collections

MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Franco Vignato

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9092 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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