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Northwest Africa 12195
Basic information Name: Northwest Africa 12195
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12195
Observed fall: No
Year found: 2018
Country: Algeria
Mass:help 61 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 409 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 9 Nov 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12195 (NWA 12195)

Algeria

Purchased: May 2018

Classification: HED achondrite (Eucrite, polymict)

History: Found north of Tindouf, Algeria, February 2018. Purchased by Darryl Pitt in Mauritania, May 2018.

Physical characteristics: Single stone, partial dark fusion-crusted exterior. Saw cut reveals a light-gray fragmental breccia.

Petrography: (C. Agee) Microprobe examination of a polished mount shows a mixture of unequilibrated, zoned pyroxenes with a population of equilibrated pyroxenes with exsolution lamellae and a clear compositional separation between low-Ca and high-Ca pyroxenes, leading to the conclusion that there are at least two distinct eucrite lithologies present.

Geochemistry: (C. Agee, UNM) Pyroxene Fs42.6±11.4Wo9.8±9.1, Fe/Mn=30±2, n=12; plagioclase An87.1±3.5, n=6.

Classification: Polymict eucrite

Specimens: 12.5 g including a probe mounts on deposit at UNM, DPitt holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P May 2018
Mass (g):61
Pieces:1
Class:Eucrite-pmict
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):42.6±11.4
Wollastonite (mol%):9.8±9.1
Classifier:C. Agee, UNM
Type spec mass (g):12.5
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MVCH-356; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1358 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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