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Hassi Messaoud 001
Basic information Name: Hassi Messaoud 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 75 g
Classification
  history:
Recommended:  Martian (nakhlite)    [explanation]

This is 1 of 31 approved meteorites classified as Martian (nakhlite).   [show all]
Search for other: Martian meteorites
Comments: Approved 21 Feb 2021
Revised 4 Apr 2021: Fixed misspelled name
Writeuphelp
Writeup from MB 110:

Hassi Messaoud 001        31°51.11’N, 6°58.59’E

Ouargla, Algeria

Find: 2020 Mar 11

Classification: Martian meteorite (Nakhlite)

History: Found on March 11, 2020, near the town of El Borma. Later acquired in 2021 by Matthew Stream from Aziz Zad.

Physical characteristics: Specimen is grayish-brown and displays a slightly weathered, minor fusion crust.

Petrography: (D. Sheikh, FSU) Specimen displays a cumulate texture (~1.1 mm grainsize) consisting primarily of compositionally zoned, prismatic or blocky (sometimes twinned) augite (displaying Fs-rich rims), ferroan olivine, and plagioclase; modal abundances: 75% augite, 15% plagioclase, 5% olivine. Accessory phases (modal abundance: 5%) are primarily found either in the mesostasis or within melt inclusions in augite or olivine grains; these phases include ferropigeonite, low-ca pyroxene, titanomagnetite, Si-Al-Na-Fe-K-rich glass, and fluorapatite.

Geochemistry: Olivine (Fa73.3±1.0, range Fa72.6-74.5, Fe/Mn = 50±1, n=3), Augite (Fs30.1±4.7Wo38.4±1.4, range Fs22.8-37.9Wo34.9-40.3, Fe/Mn = 32±4, n=47), Pigeonite (Fs58.6±4.9 Wo9.9±3.8, range Fs53.3-62.9 Wo6.6-14.0, Fe/Mn = 31±2, n=5), Low-Ca Pyroxene (Fs64.5±4.1Wo3.1±0.9, range Fs61.1-70.2Wo3.0-5.3, Fe/Mn = 35±2, n=8), Plagioclase (An37.2±1.3Or2.9±0.5, range An35.3-39.4Or2.0-4.0, n=27).

Classification: Martian (nakhlite). Sample is a martian meteorite due to the Fe/Mn ratios of olivine and pyroxene, and due to the plagioclase composition. Sample is a nakhlite due to the high modal abundance of augite and cumulate texture observed.

Specimens: 15.2 g at UCLA, main mass with Matthew Stream.

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Ouargla
Origin or pseudonym:El Borma
Date:2020 Mar 11
Latitude:31°51.11'N
Longitude:6°58.59'E
Mass (g):75
Pieces:4
Class:Martian (nakhlite)
Shock stage:low
Weathering grade:low
Fayalite (mol%):73.3±1.0
Ferrosilite (mol%):64.5±4.1, 58.6±4.9, 30.1±4.7
Wollastonite (mol%):3.1±0.9, 9.9±3.8, 38.4±1.4
Classifier:D. Sheikh, FSU
Type spec mass (g):15.2
Type spec location:UCLA
Main mass:M. Stream
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:

Algeria
Coordinates:
     Recommended::   (31° 51' 7"N, 6° 58' 35"E)

Statistics:
     This is 1 of 41 approved meteorites from Ouargla, Algeria (plus 1 unapproved name)
     This is 1 of 1232 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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Synonymshelp: Hassi Messauod (Original misspelled name)

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