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Northwest Africa 10603
Basic information Name: Northwest Africa 10603
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10603
Observed fall: No
Year found: 2015
Country: Mauritania
Mass:help 300 g
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-melt breccia
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 106 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 19 Apr 2016
Writeup from MB 105:

Northwest Africa 10603 (NWA 10603)


Purchased: April 2015

Classification: HED achondrite (Eucrite, melt breccia)

History: The sample was purchased by the main mass holder in Morocco but is believed to originate from Mauritania.

Petrography: (R. Greenwood, OU) The meteorite has a clastic texture, comprising angular, fine to medium-grained basaltic fragments, up to about 4 mm diameter, enclosed in a dark, flow-banded matrix. Plagioclase grains, are up to 1 mm long, show complex deformation twinning and are often cloudy and partially altered. Pyroxene grains show mosaicism. Numerous, distinct, sub-mm sized oval vesicles are present in the matrix.

Geochemistry: Mineral compositions and geochemistry: Pyroxene consists of a low-Ca pyroxene host, Fs59.4±1.0Wo5.4±1.1En35.2±0.1(±1σ, n=2), with well-developed exsolution lamellae of augite, Fs29.3±2.6Wo41.5±2.5En29.2±0.2 (±1σ, n=3)). Plagioclase compositions are in the range An88.3-91.5 (n=6). Accessory minerals include silica, chromite, zircon and ilmenite. Oxygen isotopes: (Laser-assisted fluorination) δ17O = 1.865‰; δ18O = 4.030‰; Δ17O = -0.247‰ (Δ17O calculated using method of Miller (2002), GCA 66, 1881-1889.

Classification: This meteorite is a brecciated eucrite with a significant impact melt component. It shows moderate weathering May be paired with NWA 10602. However, the texture observed in polished section is fairly distinct from that of NWA 10602.

Specimens: A type specimen mass of 21.86 g is held at OU. The main mass is held by Mohammed Hmani.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P April 2015
Mass (g):299.8
Class:Eucrite-melt breccia
Classifier:R. Greenwood, OU
Type spec mass (g):21.86
Type spec location:OU
Main mass:Mohammed Hmani
Comments:Submitted by Richard Greenwood
Plots: O isotopes:  
   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)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 224 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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