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Northwest Africa 11504
Basic information Name: Northwest Africa 11504
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11504
Observed fall: No
Year found: 2017
Country: Algeria
Mass:help 1869 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 21 Nov 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11504 (NWA 11504)

Algeria

Find: 15 Apr 2016

Classification: HED achondrite (Eucrite, monomict)

History: Reportedly fell in western Algeria on April 15, 2016, however no coordinates or other information are available. Purchased by Michael Farmer in Morocco, 2017.

Physical characteristics: Several identical appearing pieces found together, shiny black fusion crust exterior, broken surfaces reveal a very fresh, fine-grained breccia of white and gray grains.

Petrography: (C. Agee, UNM) This meteorite is a fine-grained breccia of primarily pyroxene and plagioclase grains.

Geochemistry: (C. Agee, UNM) pigeonite Fs60.0±2.0Wo4.7±2.2, Fe/Mn=33±2, n=11; high Ca pyroxene Fs35.5Wo33.1, Fe/Mn=34, n=1; plagioclase An86.2±5.0Ab12.9±4.5Or0.9±0.5, n=3.

Classification: Monomict eucrite

Specimens: 23 g including a probe mount on deposit at UNM, 4.15 g on deposit at PSF, MFarmer holds 1 kg, Aaronson holds 700 g, Aras Jonikas holds 142 g.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:15 Apr 2016
Mass (g):1869.14
Pieces:Several
Class:Eucrite-mmict
Shock stage:High
Weathering grade:Low
Ferrosilite (mol%):60.0±2.0
Wollastonite (mol%):4.7±2.2
Classifier:C. Agee, UNM
Type spec mass (g):27.14
Type spec location:UNM, PSF
Main mass:Michael Farmer, Adam Aaronson, Aras Jonikas
Comments:Submitted by C. Agee
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
DCOM   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 974 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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