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Northwest Africa 10252 | |||||||||||||||||||||||||||
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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: ![]() | ||||||||||||||||||||||||||
Classification history: |
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![]() |
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: MB104 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||
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) |
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Catalogs: |
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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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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |