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Northwest Africa 11897
Basic information Name: Northwest Africa 11897
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11897
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 43.9 g
Classification
  history:
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 76 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 2 Sep 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11897 (NWA 11897)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased in March 2018 by Craig Zlimen and Dustin Dickens from a Moroccan meteorite dealer.

Physical characteristics: Fusion crusted exterior; sawcut reveals a fine-grained, gray interior.

Petrography: (C. Agee, UNM) This meteorite is a porphyritic basalt with pigeonite phenocrysts set in a groundmass of fine-grained quench crystals of pyroxene, plagioclase, silica, chromite, and Fe-sulfide. Pigeonite phenocrysts show igneous zoning.

Geochemistry: (C. Agee, UNM) pigeonite Fs45.5±8.4Wo5.2±2.0, Fe/Mn=36±2, n=16.

Classification: Unequilibrated, porphyritic eucrite; unbrecciated

Specimens: 8.9 g including a probe mount on deposit at UNM, Craig Zlimen and Dustin Dickens hold the main mass.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):43.9
Pieces:1
Class:Eucrite-unbr
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):45.5±8.4
Wollastonite (mol%):5.2±2.0
Classifier:C. Agee, UNM
Type spec mass (g):8.9
Type spec location:UNM
Main mass:Craig Zlimen and Dustin Dickens
Comments:Field name DD-24; submitted by C. Agee, UNM
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6416 approved meteorites from (Northwest Africa) (plus 2023 unapproved names)

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