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Northwest Africa 10603 | |||||||||||||||||||||
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Basic information | Name: Northwest Africa 10603 This is an OFFICIAL meteorite name. Abbreviation: NWA 10603 Observed fall: No Year found: 2015 Country: Mauritania Mass: ![]() | ||||||||||||||||||||
Classification history: |
This is 1 of 76 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||
Comments: | Approved 19 Apr 2016 | ||||||||||||||||||||
Writeup![]() |
Writeup from MB 105:
Northwest Africa 10603 (NWA 10603) Mauritania 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: MB105 Table 0 Line 0: |
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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) Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address) |
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Catalogs: |
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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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Geography:![]() |
Statistics: This is 1 of 193 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters) |