Shergottites
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2018
Mass
1150 g
[Museum Collection]
(1) 0.51g
• 分類：火星隕石 シャーゴッタイト • 発見隕石：2018年 • 落下国：アルジェリア • 発見総重量：1150 g • 同分類の隕石数：335個 • Martian (shergottite) • Found 2018 • Algeria • Found 1150 g • one of 335 meteorites in this classification
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2018
Mass
3.29 kg
[Museum Collection]
(1) 2.79g (2) 1.26g
History: Purchased in Ouarzazate, Morocco by Mohamed Aid in July 2018. Petrography: (A. Irving and S. Kuehner, UWS; P. Carpenter, WUSL) Medium-grained with diabasic texture and some small, dark glassy shock melt pockets. Composed predominantly of zoned clinopyroxene and maskelynite with accessory fine grained intergrowths of hedenbergite+fayalite+silica, Fe-Ti oxide (finely exsolved), merrillite and pyrrhotite. Geochemistry: Subcalcic augite (Fs28.5-30.6Wo28.2-23.7, FeO/MnO = 30, N = 2), pigeonite (Fs41.3Wo15.5, FeO/MnO = 31), ferropigeonite (Fs71.1-83.4Wo17.1-11.3, FeO/MnO = 38-45, N = 4), maskelynite (An50.9-52.1Or2.1, N = 2). Classification: Martian (shergottite, diabasic) Specimens: 26.3 g including one polished thin section at UWB; remainder with Aaronson.
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2018
Mass
1679 g
[Museum Collection]
(1) 7.02g (2) 1.34g
History: Purchased in Ouarzazate, Morocco by Mohamed Aid in July 2018. Petrography: (A. Irving and S. Kuehner, UWS; P. Carpenter, WUSL) Relatively fine grained with intersertal texture. Composed predominantly of zoned clinopyroxene and maskelynite (some exhibiting a curved, narrow lath-like habit) with accessory fine grained intergrowths of hedenbergite+fayalite+silica, Fe-Ti oxides, merrillite and pyrrhotite. Geochemistry: Subcalcic augite (Fs24.8-41.8Wo31.4-24.3, FeO/MnO = 30-33, N = 3), ferropigeonite (Fs66.9-73.0Wo16.6-16.5, FeO/MnO = 41-43, N = 2), maskelynite (An51.9-53.1Or1.3-1.2, N = 2). Classification: Martian (shergottite, fine-intersertal) Specimens: 20.5 g including one polished thin section at UWB; remainder with Mr. Aaronson.
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2018
Mass
150 g
[Museum Collection]
(1) 9.59g (2) 0.97g (3) 0.82g
History: Found in Algeria in 2018 and purchased from a Moroccan dealer by Huapei Wang in 2018 Physical characteristics: These stones are (partially) covered by black fusion crust and appear to be very fresh and unaltered. Numerous vesicles are seen in the fusion crust. The interior is composed of yellow green grains with interstitial pale gray grains. Petrography: The rock has a medium-grained subophitic texture. It consists of elongated prismatic pyroxene (up to 1.5 mm in length) and lath-like plagioclase (up to 1.8 mm in length), with accessory titanomagnetite, ilmenite, silica polymorph, merrillite, pyrrhotite, fayalite. Pyroxenes show patchy zoning from Mg-rich core to Mg-poor rim, with irregular boundaries. Ilmenite occurs as thin lamellae intergrown with titanomagnetite. Geochemistry: Pyroxenes are zoned from augite cores (En45.3Wo25.6, FeO/MnO = 28.5) and pigeonite cores (En40.3Wo19.6 FeO/MnO = 32.3) to ferropigeonite rims (En8.4Wo14.5 FeO/MnO = 41.1). Plagioclase is characterized by homogeneous compositions of An52 Or1.4. Titanomagnetite (TiO2 29.4 wt%, FeO 65.5 wt%, Al2O3 1.3 wt%); ilmenite (TiO2 48.9 wt%, FeO 49.8 wt%).
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2019
Mass
1600 g
[Museum Collection]
(1) 3.0g
History: Purchased by Mark Lyon in September 2019 from a Moroccan dealer. Some of this material was subsequently sold to Mike Fleeman and Roberto Vargas. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Diabasic texture. Composed predominantly of zoned clinopyroxene and maskelynite with accessory ulvöspinel (some Cr-bearing), ilmenite, silica polymorph, merrillite, pyrrhotite and minor secondary calcite. Geochemistry: Subcalcic augite cores (Fs20.3-23.3Wo36.2-32.0, FeO/MnO = 28-29, N = 4), ferroan pigeonite rims (Fs52.4-59.2Wo14.2-19.7, FeO/MnO = 36-39, N = 4), maskelynite (An50.5-57.2Or1.9-0.7, N = 3). Classification: Shergottite (diabasic). Specimens: 20.1 g including one polished thin section at UWB; remainder held by Mr. M. Lyon, Mr. M. Fleeman (550 g) and Mr. R. Vargas (50 g).
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2019
Mass
49 g
[Museum Collection]
(1) 4.3g
History: Purchased in 2019 by Miguel Angel Contreras Gomez from a meteorite dealer in Algeria. Physical characteristics: This sample has a weathered fusion crust exterior, however the interior remains fresh. Petrography: (D. Sheikh, FSU) Sample is a diabase having a predominantly subophitic texture composed of complexly zoned, tabular and prismatic (sometimes twinned) chadacrysts of subcalcic augite and pigeonite (Av. 330±50 µm, up to 1mm, 60 vol%) contained within larger oikocrysts of maskelynite (Av. 800±100 µm, up to 2 mm, 40 vol%). Accessory phases include titanomagnetite (some Cr rich), ilmenite, silica, Si-Al-K-Na rich glass, merrillite, and pyrrhotite. Geochemistry: Subcalcic augite (Fs32.3±6.6 Wo30.7±2.3, range Fs21.7-47.7 Wo25.4-35.2, FeO/MnO=34±6, n=37) pigeonite (Fs52.7±8.5 Wo14.4±2.3, range Fs30.6-72.3 Wo10.0-19.3, FeO/MnO=36±4, n=54) maskelynite (An48.9±5.1 Or1.9±1.0, range An41.4-55.7 Or0.3-3.8, n=43). Classification: Martian (shergottite, diabasic) Silicate chemistry, the presence of maskelynite, FeO/MnO ratios of pyroxenes, and magnetic susceptibility provide support for classification as shergottite. Average grain sizes of pyroxenes and maskelynite larger than that of basaltic shergottites, but smaller than gabbroic shergottites, hence diabasic. Specimens: 10.02 grams at UCLA; main mass with Miguel Angel Contreras Gomez.
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2020
Mass
346 g
[Museum Collection]
(1)20.529g (2)10.515g (3)4.461g (4)3.613g
(5)3.609g (6)3.178g (7)3.144g (8)2.531g
(9)2.445g (10)1.982g (11)1.860g (12)1.562g
(13)1.544g (14)1.408g (15)1.399g(16)1.288g (17)1.275g (18)1.260g (19)1.110g(20)1.024g (21)0.879g (22)0.858g (23)0.853g(24)0.795g (25)0.730g (26)0.717g (27)0.711g(28)0.699g (29)0.608g (30)0.566g (31)0.517g(32)0.497g (33)0.462g (34)0.451g (35)0.446g(36)0.424g
• 分類：火星隕石 シャーゴッタイト • 発見隕石：2020年 • 落下国：北西アフリカ • 発見総重量：346 g • 同分類の隕石数：335個 • Martian (shergottite) • Found 2020 • Northwest Africa • Found 346 g • one of 335 meteorites in this classification
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2020
Mass
249 g
[Museum Collection]
(1) 5.50g
History: Purchased from a Moroccan dealer in April 2020. Physical characteristics: Single stone, fusion crust, saw cuts reveals an ultramafic cumulate rock with ophitic to poikilitic textures with mm-size pale yellow and dark gray grains. Petrography: (C. Agee, UNM) Microprobe examination shows approximately 50% olivine, 40% pyroxene, and 10-5% maskelynite. Two distinct pyroxene trends are present 1) Mg-rich low calcium pyroxene trending to slightly more Fe-rich pigeonite, 2) Mg-rich augite trending to more Ca-rich augite. Ilmenite, spinel, Fe-sulfide, and merrillite are minor ubiquitous phases. Geochemistry: (C. Agee, UNM) Olivine Fa34.6±2.0, Fe/Mn=49±2, n=10; low Ca-pyroxene Fs22.5±0.5Wo4.7±0.7, Fe/Mn=29±2, n=6; augite Fs17.2±0.9Wo32.4±2.8, Fe/Mn=24±1, n=4; maskelynite An52.9±2.3Ab46.0±2.2Or1.1±0.2, n=4, fusion crust SiO2=46.5±0.6, TiO2=0.9±0.1, Al2O3=8.6±3.5, Cr2O3=0.7±0.1, MgO=18.0±3.5, FeO=15.3±0.5, MnO=0.4±0.1, Na2O=1.4±0.5 (all wt%), n=2. Classification: Martian peridotitic shergottite. Macroscopic textural appearance similar to NWA 1950 and ALHA77005. Paired with NWA 13250. Specimens: 20 g on deposit at UNM, Marcin Cimala holds the main mass.
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2021
Mass
4 kg
[Museum Collection]
(1) 0.91g
History: Purchased January, 2021 by Mark Lyon from a Northwest African dealer Physical characteristics: Four identical appearing stones with desert weathered exteriors. Saw cut reveals a medium grained cumulate with light and dark crystals, with the darker crystals coinciding with areas that appear to be shock darkened. Numerous black shock melt pockets are present. Petrography: (A. Ross, UNM; D. Dickens, NMMS; C. Agee, UNM) Examination of a polished microprobe mount shows ~50% igneous-zoned subcalcic augite and ~45% maskelynite, with ubiquitous Ti-magnetite, ilmenite, merrillite, and troilite making up the remainder. Shock melt was observed. Geochemistry: (A. Ross, UNM) Pigeonite Fs49.4±1.9Wo13.5±1.4, Fe/Mn=35±2, n=10; augite Fs28.0±5.6Wo32.7±1.4, Fe/Mn=31±3, n=10; plagioclase An53.6±0.7Ab45.4±0.8, Or 1.0±0.1, n=6. Classification: Martian basaltic shergottite Specimens: 21.42 g including a probe mount on deposit at UNM, Mark Lyon holds the main mass.
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2023
Mass
339 g
[Museum Collection]
(1) 5.25g (2) 2.57g
History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Grayish to dark greenish fragments with patches of black fusion crust. Petrography: The meteorite shows a poikilitic texture of up to 3 mm sized pyroxenes enclosing rounded to subrounded olivines that frequently contain trapped melt inclusions. Feldspar is a minor component and has completely been transformed to maskelynite. Accessory minerals include chomite, FeS and FeNiS. Contains glassy to finely recrystallized shock melt pocket. Geochemistry: olivine: Fa27.8±0.7 (Fa26.8-28.4, FeO/MnO=44±1, n=10); orthopyroxene: Fs18.7±0.3Wo2.4±0.1 (Fs18.3-19.5Wo2.3-2.6, FeO/MnO=27±2, n=10); pigeonite: Fs24.6±1.5Wo10.6±2.3 (Fs20.4-26.6Wo7.1-13.7, FeO/MnO=26±1, n=10); maskelynite (An53.2-56.3Ab42.4-45.4Or1.3-1.5, n=10) Classification: Martian meteorite (shergottite); likely paired with NWA 10961
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2023
Mass
200 g
[Museum Collection]
(1) 2.21g (2) 1.54g
• 分類：火星隕石 シャーゴッタイト • 発見隕石：2023年 • 落下国：北西アフリカ • 発見総重量：200 g • 同分類の隕石数：335個 • Martian (shergottite) • Found 2023 • Northwest Africa • Found 200 g • one of 335 meteorites in this classification
Name
*click on the Name for more information
Structure Class
achondrites
Chemical Class
Martian (shergottite)
Country
Year found
2023
Mass
88.3 g
[Museum Collection]
(1) 1.534g
History: Purchased by Eric Twelker in January 2023 from a dealer in Guelmim, Morocco. Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) The specimen has a relatively coarse grained intergranular texture and is composed predominantly of zoned, prismatic, simply-twinned grains of clinopyroxene (up to 3 mm long) and smaller laths of maskelynite (mean size ~ 1 mm). Accessory phases include merrillite, pyrrhotite, ulvöspinel, ilmenite and symplectitic intergrowths of fayalite+hedenbergite+silica polymorph (located at the margins of strongly zoned clinopyroxene grains). Small shock melt pockets containing "swirly" glass (pale clove-brown in thin section) are present, as well as some veinlets of secondary calcite and Fe oxides. Geochemistry: Augite cores (Fs22.0-25.7Wo45.7-40.4, FeO/MnO = 24-28, N = 4), ferropigeonite rims (Fs52.9-74.4Wo8.2-18.9, FeO/MnO = 34-37, N = 4), subcalcic augite rim (Fs60.1Fs21.1, FeO/MnO = 35), maskelynite (An50.1-54.9Or2.6-1.0, N = 4), fayalite in symplectite (Fa90.1, FeO/MnO = 40), hedenbergite in symplectite (Fs53.5Wo31.9, FeO/MnO = 35). Classification: Shergottite (gabbroic). Specimens: 18.1 g including one polished thin section at UWB; remainder with Twelker.