Meteoritical Bulletin: Entry for Northwest Africa 8114

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Northwest Africa 8114

Basic information

Name: Northwest Africa 8114
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8114
Observed fall: No
Year found: 2013
Country: Western Sahara
Mass: 1.9 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	Martian (basaltic breccia)
	MB 107	(2018)	Martian (polymict breccia)
Recommended:			Martian (polymict breccia) [explanation]

This is 1 of 18 approved meteorites classified as Martian (polymict breccia). [show all]
Search for other: Martian meteorites

Comments:

Approved 10 Dec 2013
Revised 16 Nov 2018: Updated class; see NWA 7034)

Writeup

help

Writeup from MB 102:

Northwest Africa 8114 (NWA 8114) 24°04’45.8’’N, 14°47’12.4’’W

Western Sahara

Found: Feb 2013

Classification: Martian meteorite (basaltic breccia)

History: Purchased from a Moroccan meteorite dealer, Mohammed Aid.

Physical characteristics: Fusion crusted stone, 1.8 cm length. The meteorite contains some terrestrial carbonate veining visible on the surface and in thin section. Some clasts also show through the fusion crust.

Petrography: The sample has a clastic texture with augite and pigeonite (En_32-69Fs_19-44Wo_1.5-38), predominantly andesine plagioclase but also K-rich feldspar (An_15-60Ab_38-76Or_1.8-10and Ab_22-41Or_59-78), Cl-apatite and Ti-magnetite. These composition ranges are very similar to those reported by Agee et al. (2013) for pyroxene in NWA 7034. Like NWA 7034, the new sample contains zoned and rounded basaltic mineralogy and monomineralic (pyroxene, feldspar) clasts.

Geochemistry: (R. Greenwood, OU) Oxygen isotopes: δ¹⁷O = 4.36; δ¹⁸O = 7.25; Δ¹⁷O = 0.59 per mil. Although the δ¹⁸O value is at the high end of the Agee et al. (2013) analyses of NWA 7034, both have similar (unique) Δ¹⁷O.

Classification: SNC, basaltic breccia, likely paired with NWA 7034.

Specimens: 1.9 g at ULei

Bibliography:

Agee C.B., Wilson N.V., McCubbin F.M., Ziegler K., Polyak V.J., Sharp Z.D., Asmerom Y., Nunn M.H., Shaheen R., Thiemens M.H., Steele A., Fogel M.L., Bowden R., Glamoclija M., Zhang Z., and Elardo S.M. (2013) Unique meteorite from Early Amazonian Mars: water-rich basaltic breccia Northwest Africa 7034. Science 1228858, Published online 3 January 2013 DOI:10.1126/science.1228858] (link)

Data from:
  MB102
  Table 0
  Line 0:

State/Prov/County:	Rio de Oro
Date:	Feb 2013
Latitude:	24°04'45.8''N
Longitude:	14°47'12.4''W
Mass (g):	1.9
Pieces:	1
Class:	Martian (basaltic breccia)
Shock stage:	low
Weathering grade:	medium
Ferrosilite (mol%):	19-44
Wollastonite (mol%):	1.5-38
Classifier:	J. Bridges, ULei
Type spec mass (g):	1.9
Type spec location:	ULei
Main mass:	ULei
Comments:	Submitted by John Bridges

Plots:

O isotopes:

Institutions
and collections

OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
ULei: University of Leicester, United Kingdom (institutional address; updated 10 May 2016)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

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Geography:

Western Sahara

Western Sahara

Coordinates:
Recommended::	(24° 4' 46"N, 14° 47' 12"W)

Statistics:
This is 1 of 47 approved meteorites from Rio de Oro, Western Sahara
This is 1 of 265 approved meteorites from Western Sahara (plus 20 unapproved names)

Proximity search:

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