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Northwest Africa 5738
Basic information Name: Northwest Africa 5738
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5738
Observed fall: No
Year found: 2009
Country: Morocco
Mass:help 2.2 kg
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 224 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 25 May 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 5738 (NWA 5738)

Morocco

Found: 2009

Classification: HED achondrite (Eucrite, brecciated)

Physical characteristics: Almost entirely fusion-crusted.

Petrography: Brecciated eucrite with glassy shock-melt veins. Pyroxene FeO/MnO (avg. wt. ratio) 32.9. Monomict status is shown by pyroxne data: 62 analyses all along a single tie-line on pyroxene quadrilateral. Compositionally, shock-melt vein glasses resemble bulk rock.

Geochemistry: Oxygen isotopic composition (B-G. Choi and I. Ahn, using CO2 laser-fluorination at KOPRI): δ18O = 3.59, δ17O = 1.62 and Δ17O = -0.27 (all per mil). Bulk-rock INAA and EPMA data (e.g., Fe/Mn, Ga/Al) confirm it is a eucrite.

Classification: Brecciated eucrite.

Data from:
  MB100
  Table 1
  Line 1278:
Place of purchase:Tucson
Date:2009
Mass (g):2200
Pieces:1
Class:Eucrite-br
Shock stage:moderate
Weathering grade:Light
Ferrosilite (mol%):65-29
Wollastonite (mol%):2-43
Classifier:P. Warren, UCLA
Type spec mass (g):24
Type spec location:UCLA
Main mass:Nick Gessler
Comments:Submitted by Paul Warren; number of stones corrected 25 Sept 2012
Plots: O isotopes:  
Institutions
   and collections		 UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016)
KOPRI: Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon, Korea, 406-840, South Korea; Website (institutional address; updated 20 Dec 2014)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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