Meteorite: Martian Nakhlite Hassi Messaoud 001 Whole individual 0.258 grams #661

Description

Meteorite: Martian Nakhlite Hassi Messaoud 001 Whole individual
0.258 grams #661
On Offer:
0.258
grams whole individual of Hassi Messaoud 001
Type:
Martian (nakhlite)
SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW:
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:
75 g
Classification
history:
Recommended:
Martian (nakhlite)
This is 1 of 28 approved meteorites classified as Martian (nakhlite).
Search for other: Martian meteorites
Comments:
Approved 21 Feb 2021
Revised 4 Apr 2021: Fixed misspelled name
Writeup
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 (Fa
73.3±1.0
, range Fa
72.6-74.5
, Fe/Mn = 50±1, n=3), Augite (Fs
30.1±4.7
Wo
38.4±1.4
, range Fs
22.8-37.9
Wo
34.9-40.3
, Fe/Mn = 32±4, n=47), Pigeonite (Fs
58.6±4.9
Wo
9.9±3.8
, range Fs
53.3-62.9
Wo
6.6-14.0
, Fe/Mn = 31±2, n=5), Low-Ca Pyroxene (Fs
64.5±4.1
Wo
3.1±0.9
, range Fs
61.1-70.2
Wo
3.0-5.3
, Fe/Mn = 35±2, n=8), Plagioclase (An
37.2±1.3
Or
2.9±0.5
, range An
35.3-39.4
Or
2.0-4.0
, 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.
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