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Bordj Badji Mokhtar 001
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:help 733 g
Classification
  history:
Recommended:  Pallasite, ungrouped    [explanation]

This is 1 of 10 approved meteorites classified as Pallasite, ungrouped.   [show all]
Search for other: Metal-rich meteorites, Pallasites
Comments: Approved 16 May 2022
Writeuphelp
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:
State/Prov/County:Adrar
Date:2021
Latitude:23°11'57.7"N
Longitude:1°01'15.0"W
Mass (g):733
Pieces:1
Class:Pallasite, ungrouped
Shock stage:low
Weathering grade:low
Fayalite (mol%):14.1±0.2
Ferrosilite (mol%):12.7±0.1
Wollastonite (mol%):0.5±0.1
Classifier:C. Agee, UNM
Type spec mass (g):23.9
Type spec location:UNM
Main mass:Jay Piatek
Comments:Fieldname JP-3001; submitted by C. Agee
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:

Algeria
Coordinates:
     Recommended::   (23° 11' 58"N, 1° 1' 15"W)

Statistics:
     This is 1 of 171 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1194 approved meteorites from Algeria (plus 28 unapproved names) (plus 4 impact craters)
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