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| Bordj Badji Mokhtar 001 | |||||||||||||||||||||||||||||||||||
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| Basic information | Name: Bordj Badji Mokhtar 001 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2021 Country: Algeria Mass:  733 g | ||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 13 approved meteorites classified as Pallasite, ungrouped. [show all] Search for other: Metal-rich meteorites, Pallasites | ||||||||||||||||||||||||||||||||||
| Comments: | Approved 16 May 2022 | ||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Bordj Badji Mokhtar 001 23°11’57.7"N, 1°01’15.0"W Adrar, Algeria Find: 2021 Classification: Pallasite (ungrouped) History: Found in Algeria, 2021. Purchased by Jay Piatek from Habib Naji in March 2021. Physical characteristics: Single piece with irregular-shaped exterior covered in black fusion crust. Sawcut surface of the deposit sample shows approximately 60% olivine (with opx and other silicate and oxide phases) and 35% metal. Olivine crystals are up to ~1 cm in size with subhedral to rounded shapes with a few fragmental and have predominantly green cores with orange rims. Petrography: (A. Ross, C. Agee, UNM, D. Dickens NMMS) Electron microprobe analysis reveals the presence olivine, orthopyroxene, kamacite, taenite, troilite, chromite, schreibersite, silica, and merrillite. Orthopyroxene occurs primarily as 100-200 µm grains aggregated around and mantling large olivines and forming boundaries between metal domains and olivine grains. Olivine to orthopyroxene abundance ratio is variable throughout the section ranging from 2:1 to 20:1. Geochemistry: (A. Ross, UNM) Olivine Fa14.1±0.2, Fe/Mn=39±1, Fe/Mg=0.16±0.00, n=6; low-Ca pyroxene Fs12.7±0.1Wo0.5±0.1, Fe/Mn=24±0, n=6; kamacite Ni=6.3±0.1, Co=0.50±0.06 (wt%), n=2; taenite Ni=21.2±7.8, Co=0.31±0.02 (wt%), n=2. Oxygen isotopes (K. Ziegler, UNM): 3 acid-washed fragments analyzed by laser fluorination gave δ18O= 3.712, 3.362, 3.779; δ17O= 1.731, 1.533, 1.768; Δ17O= -0.229, -0.242, -0.227 (linearized, all per mil, TFL slope=0.528). Classification: Pallasite ungrouped. This is a pyroxene pallasite with oxygen isotopes that plot below the Main Group, and within the HED and mesosiderite arrays. This pyroxene pallasite has similar oxygen isotopes to the pyroxene pallasite NWA 10019, but with lower Fa values similar to the pallasite main group and lacking feldspar which is present in NWA 10019. Specimens: 23.9 g including a probe mount on deposit at UNM, Jay Piatek holds the main mass. | ||||||||||||||||||||||||||||||||||
| Data from: MB111 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) |
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| References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:
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Statistics: This is 1 of 210 approved meteorites from Adrar, Algeria (plus 1 unapproved name) This is 1 of 1402 approved meteorites from Algeria (plus 33 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||||
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