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Hassi el Biod 002
Basic information Name: Hassi el Biod 002
     This is an OFFICIAL meteorite name.
Abbreviation: HeB 002
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 10 kg
Classification
  history:
Recommended:  Pallasite, ungrouped    [explanation]

This is 1 of 9 approved meteorites classified as Pallasite, ungrouped.   [show all]
Search for other: Metal-rich meteorites, Pallasites
Comments: Approved 24 Jul 2021
Writeuphelp
Writeup from MB 110:

Hassi el Biod 002 (HeB 002)        28.6284, 4.7276

Ouargla, Algeria

Purchased: 2021

Classification: Pallasite (ungrouped)

History: Purchased in 2021 by Mark Lyon from a meteorite dealer in Mauritania.

Physical characteristics: Five identically appearing masses (total 10 kg) found together. Saw cut surface shows angular cm-sized dark-orange olivine grains set in metal. There are also smaller scattered olivines set in the host metal. The modal abundances are approximately 60% metal, 38% olivine, 2% troilite.

Petrography: (A. Ross and C. Agee, UNM) Electron microprobe analysis and imaging reveal the presence of magnesian olivine, kamacite, and minor troilite. No other phases were detected with both EPMA and SEM searches.

Geochemistry: (A. Ross, UNM) Olivine Fa7.7±0, Fe/Mn=24±1, n=6; metal Fe=95.4±0.4, Ni=5.2±0.1 wt%, n=5. Oxygen isotopes (K. Ziegler, UNM): 3 acid-washed fragments analyzed by laser fluorination gave δ18O= 2.820, 3.390, 3.386; δ17O= 0.338, 0.440, 0.650; Δ17O= -1.151, -1.350, -1.138 (linearized, all per mil, TFL slope=0.528).

Classification: Pallasite, ungrouped. This is a unique pallasite type both in terms of olivine composition and oxygen isotopes. Along with Milton, this meteorite is the only other ungrouped that is not a pyroxene pallasite, however Milton and this meteorite are not paired and do not have olivine compositions and oxygen isotopes that are similar.

Specimens: 25.7 g on deposit at UNM, Mark Lyon holds the main masses.

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Ouargla
Place of purchase:Mauritania
Date:P 2021
Latitude:28.6284
Longitude:4.7276
Mass (g):10000
Pieces:5
Class:Pallasite, ungrouped
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):7.7±0.2
Classifier:C. Agee, UNM
Type spec mass (g):25.7
Type spec location:UNM
Main mass:Mark Lyon
Comments: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. 110, in preparation (2021)
Find references in NASA ADS:
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Photos:
CreditPhotos
Public domain photographs:
Carl Agee      
Geography:

Algeria
Coordinates:
     Recommended::   (28° 37' 42"N, 4° 43' 39"E)

Statistics:
     This is 1 of 34 approved meteorites from Ouargla, Algeria
     This is 1 of 1140 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)
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