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Rafsa 001
Basic information Name: Rafsa 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2019
Country: Algeria
Mass:help 127.6 g
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 289 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 9 Feb 2020
Writeup from MB 109:

Rafsa 001        28.736°N, 7.607°W

Tindouf, Algeria

Find: 2019 Feb

Classification: Martian meteorite (Shergottite)

History: A 70.9 g stone was found by a group of camel herders near Bou Akba in northwestern Algeria in February 2019. Some time later they found an identical-appearing 56.7 g stone about 700 m from the first one. In September 2019, both stones were purchased by Ben Hoefnagels through an American agent for the finders.

Physical characteristics: Both stones lack fusion crust and have weathered exteriors. Saw cuts reveal that both have thin weathering rinds, but the fresh interiors exhibit dark olivine phenocrysts in a fine-grained lighter-colored groundmass and sparse dark melt pockets containing vesicles (some partly filled with secondary terrestrial minerals).

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Euhedral to subhedral, zoned olivine phenocrysts (up to 2mm; with interior regions of orange-brown staining) are set in a groundmass composed mainly of polysynthetically-twinned, prismatic clinopyroxene and maskelynite with accessory orthopyroxene (as cores to some groundmass pyroxene grains), merrillite, Ti-chromite, Ti-free chromite, ilmenite, pyrrhotite and pentlandite. Sparse dark shock melt pockets (with swirly texture and secondary calcite in vesicular cavities) are present.

Geochemistry: Olivine (cores Fa28.8-30.4, FeO/MnO = 47-54, N = 5; rims Fa32.4-35.2, FeO/MnO = 50-54, N = 5), orthopyroxene core (Fs21.8Wo3.8, FeO/MnO = 29), pigeonite (cores Fs23.7-23.9Wo8.6-10.4, FeO/MnO = 28-30, N = 4; rims Fs27.6-30.7Wo9.0-10.3, FeO/MnO = 25-32, N = 4), high-Ca pyroxene (Fs16.8-17.6Wo36.1-30.5, FeO/MnO = 25-29, N = 3), maskelynite (An62.6-64.9Or0.3-0.5, N = 3).

Classification: Shergottite (olivine-phyric).

Specimens: 21 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Bou Akba
Place of purchase:Wisconsin
Date:2019 Feb
Mass (g):127.6
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Fayalite (mol%):28.8-35.2
Ferrosilite (mol%):21.8; 23.7-30.7; 16.8-17.6
Wollastonite (mol%):3.8; 8.6-10.4; 36.1-30.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21
Type spec location:UWB
Main mass:B. Hoefnagels
Comments:Work names DL1002&1003; BH222; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     Recommended::   (28° 44' 10"N, 7° 36' 25"W)

     This is 1 of 50 approved meteorites from Tindouf, Algeria (plus 1 impact crater)
     This is 1 of 1270 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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