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Northwest Africa 10252
Basic information Name: Northwest Africa 10252
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10252
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 660 g
Meteoritical Bulletin:  MB 104  (2015)  Pallasite, PMG-an
Recommended:  Pallasite, PMG-an    [explanation]

This is 1 of 16 approved meteorites classified as Pallasite, PMG-an.   [show all]
Search for other: Main group pallasites, Metal-rich meteorites, and Pallasites
Comments: Approved 3 Oct 2015
Writeup from MB 104:

Northwest Africa 10252 (NWA 10252)

(Northwest Africa)

Purchased: April 2015

Classification: Pallasite (Main group, anomalous)

History: Purchased by Darryl Pitt from Moroccan meteorite dealer in April 2015.

Physical characteristics: Irregular exterior, dark metallic patina, slight oxidation. Polished saw cuts show angular orange-brown-green, translucent olivines set in fresh, unoxidized metal.

Petrography: (C. Agee, UNM) Olivine is the only silicate phase present. Approximately 98% of the metal consists of very fine-grained (<1 μm) plessite, with kamacite occuring as a thin mantling around olivine crystals. Accessory schreibersite, chromite, Ni-rich sulfide, and Ca-Mg phosphates were observed.

Geochemistry: (C. Agee and N. Muttik, UNM Olivine Fa13.3±0.1, Fe/Mn=47±3, n=10; plessite Fe=82.9±5.7, Ni=15.9±5.8, Co=0.60±0.08 (all wt%), n=10; kamacite Fe=94.4±1.0, Ni=5.9±0.9, Co=0.83±0.05 (all wt%), n=10; schreibersite Fe=59.3±2.6, Ni=25.3±2.6, Co=0.28±0.04, P=14.2±0.2 (all wt%), n=4. Oxygen isotopes (K. Ziegler, UNM) laser fluorination of acid-washed bulk subsamples gave (mean of 3), respectively, δ17O = 1.351, δ18O = 3.049, Δ17O = -0.258 permil (linearized).

Classification: Pallasite, main group anomalous based on oxygen isotopic composition, likely paired with NWA 10023.

Specimens: 22.6 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P April 2015
Mass (g):660
Class:Pallasite, PMG-an
Shock stage:low
Weathering grade:low
Fayalite (mol%):13.3±0.1
Classifier:C. Agee, UNM
Type spec mass (g):22.6
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MAC 135; submitted by C. Agee, UNM
Plots: O isotopes:  
   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)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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