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Pallasites

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Admire

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

1881

Mass

180 kg

[Museum Collection]

(1) 112g

This is 1 of 56 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Published in Meteoritical Bulletin, no. 37, Moscow (1966)

Brahin

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

1810

Mass

823 kg

[Museum Collection]

(1) 188.8g

This is 1 of 56 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Published in Meteoritical Bulletin, no. 44, Moscow (1968) reprinted Met. 5, 85-109 (1970)

Glorieta Mountain

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG-an

Country

Year found

1884

Mass

148 kg

[Museum Collection]

(1) 23g   (2) 27g

This is 1 of 16 approved meteorites classified as Pallasite, PMG-an. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Never published in the Meteoritical Bulletin

Fukang

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

2000

Mass

1 t

[Museum Collection]

(1) 122g   (2)105g   (3) 85g

History: An anonymous finder recovered a 1003 kg specimen near Fukang, China, in 2000. The sample was at the Tucson Gem and Mineral Show in February 2005, and seen by D. S. Lauretta of UAz. Approximately 20 kg had been removed from the main mass by the finder before the Tuscon show and the mass investigated at UAz was 983 kg. (D. S. Lauretta, D. Hill, M. Killgore, D. Della-Giustina, Y. Goreva, UAz; I. Franchi, OpenU). Petrography and Geochemistry: Olivine: Throughout the large mass, olivines vary in shape from rounded to angular; many are fractured. They range in size from <5 mm to several cm. The main pallasite contains several regions of “massive” olivine clusters up to 11 cm in diameter with thin metal veins only a few millimeters in width. Fo86.4 with molar Fe/Mg = 0.1367, Fe/Mn = 40.37, and Ni = 0.03 wt%. Zoning was not observed for Al, Cr, Ca, Mn, or Fe typical of olivines in main-group pallasites. Metal and sulfides: Groundmass is mostly kamacite with some occurrences of kamacite mantles surrounding taenite cores, rounded taenite adjacent to kamacite, and regions of “comb plessite. ” Kamacite contains an average Ni = 6.98 wt%. Schreibersite is enclosed by wide kamacite bands and as mantles adjacent to olivines. Two populations of schreibersite are present with Ni = 26 and 35 wt% near chromite. Vermicular sulfide (troilite) is present in some olivine. Thin veins of kamacite and troilite occur inside many olivines as well. Minor phases: Euhedral chromites up to 0.5 cm, rounded whitlockite adjacent to olivine, and troilite heterogeneously distributed in thin veins. Several regions, ranging from

Hassi el Biod 002

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, ungrouped

Country

Year found

2021

Mass

10 kg

[Museum Collection]

(1) 53.0g

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.

Huckitta

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG-an

Country

Year found

1924

Mass

2.3 t

This is 1 of 16 approved meteorites classified as Pallasite, PMG-an. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Search for this meteorite in the Museo Nazionale dell'Antartide database (Siena, Italy): Never published in the Meteoritical Bulletin

Imilac

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

1822

Mass

920 kg

[Museum Collection]

(1) 19.7g   (2) 13.206g   (3) 9.267g   (4)8.754g
(5) 3.892g   (6) 2.1g   (7) 1.4g   (8) 1.3g
(9) 1.3g   (10) 1.2g   (11) 1.0g   (12) 0.9g
(13) 42.3g   (14) 21.6g

This is 1 of 56 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Never published in the Meteoritical Bulletin

Jepara

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

2008

Mass

499.5 kg

[Museum Collection]

(1) 52.5g

History: Anonymous finders recovered the meteorite specimen in 2008 during excavation activities in muddy ground. Physical characteristics: The original mass of the meteorite boulder was 499.5 kg. It is spherically shaped with the shortest and longest diameter of 70 cm and 85 cm, respectively. The crust is weathered and rusty. Petrography: The interior shows a homogeneous distribution of coarse-grained rounded olivine grains (6 to 12 mm). The groundmass is composed of secondary magnetite, nickel sulfide and sulfate (nickel hexahydrite), and primary schreibersite. Modal abundances are olivine (64 vol%), magnetite (23 vol%), nickel sulfide and sulfate (8 vol%), and schreibersite (5 vol%). Geochemistry: Olivines are homogeneous in composition (Fa12-13). Sulfide is composed of NiS and may represent a replacement product of troilite, while magnetite (Fe3O4) is a weathering product of primary FeNi phases. Schreibersite has the composition (Fe1.85Ni1.15)P. Replicate analyses of oxygen isotopes were made on acid-washed samples by laser fluorination at UGött (A. Pack): δ17O (SMOW) 1.862, 1.367, 1.380; δ18O (SMOW) 3.820, 3.011, 3.160; and Δ17O -0.130 -0.200, -0.280 (all per mil). Classification: Main group pallasite, extensively weathered, fresh olivine Specimens: Type specimens of 230 g and 20 g with surface areas of 190 cm2 and 20 cm2, respectively, and one thin section are on deposit at UJena. An anonymous owner holds the main mass.

Mount Vernon

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

1868

Mass

159 kg

[Museum Collection]

(1) 81g

This is 1 of 56 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Never published in the Meteoritical Bulletin

Quijingue

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

1984

Mass

59 kg

[Museum Collection]

(1) 45.1g

This is 1 of 56 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG. Search for specimens in the Smithsonian Institution collection (U.S.): Published in Meteoritical Bulletin, no. 83, MAPS 34, A169-A186 (1999)

Sericho

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite

Country

Year found

2016

Mass

2.8 t

[Museum Collection]

(1) 7215g   (2) 888g   (3) 1041g   (4) 481g

History: In 2016, two brothers were searching for their camels and came across several large, dense stones west of the village of Habaswein and south of Sericho, Kenya. There are no rocks in this area, so they decided they were meteorites. They spent several weeks collecting them with engine hoists and moving them to their homes in Habaswein. Though recognized as meteorites in 2016, the masses had been known to camel-herders for decades. One village elder said that as a child, he and his brothers would play on top of the stones. In early January 2017, Michael Farmer received an email showing a photo of “giant pallasite” weighing 107 kg. He traveled to Nairobi and purchased this stone. Two weeks later he returned to Kenya with Moritz Karl and traveled to Habaswein. Here they were shown more than one ton of specimens stacked in the courtyards of two house compounds. To date, more than 2800 kg has been found. Physical characteristics: To date, masses ranging from 45 km long, starting several km west of Habaswein and south of Sericho in Isiolo County. The smaller pieces were found nearer to Habaswein, but still in Isiolo County. The villagers continue to find pieces, mostly on the surface. The majority of the pieces are >50 kg. The meteorites found on the surface show minimal weathering, with patches of fusion crust on the metal. Most stones are blocky, exhibiting a few broad regmaplypts. Several flight-oriented specimens were found, including a 129 kg and two 16 kg stones. Petrography: Slices from several stones show similar metal/olivine ratio, averaging near 70 areal% olivine and 1600 kg with Michael Farmer, Thomas Strope, and Moritz Karl; 143 g, 129 kg, and 23 kg stones at the Maine Mineral and Gem Museum; 1344 g at MNHNP (two stones of 694 and 650 g); another 82 kg with an anonymous owner.

Seymchan

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

1967

Mass

323.3 kg

[Museum Collection]

(1)26.0kg   (2)1.914kg   (3)2.322kg   (4)322.8g
(5)461.9g   (6)163.5g   (7)155.7g   (8)563g
(9)226.8g   (10)139.9g   (11)115.7g   (12)64g
(13)61g   (14)38g   (15)35.2g   (16)20.6g
(17)19.8g   (18)17.5g   (19)14.6g   (20)14.4g

(21)14.3g   (22)13.6g   (23)13.3g   (24)11.3g
(25)11.2g   (26)10.4g   (27)10.1g   (28)10g
(29)10g   (30)9.9g   (31)8.7g   (32)8.1g
(33)7.9g   (34)7.6g   (35)12.9g   (36)12.8g
(37)11.4g   (38)8.5g   (39)6.1g   (40)5.7g

(41)4.5g   (42)3.0g   (43)7.46g

This is 1 of 56 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG. Search for specimens in the Smithsonian Institution collection (U.S.): Published in Meteoritical Bulletin, no. 43, Moscow (1968) reprinted Met. 5, 85-109 (1970)

Springwater

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG-an

Country

Year found

1931

Mass

67.6 kg

[Museum Collection]

(1) 228.5g

This is 1 of 16 approved meteorites classified as Pallasite, PMG-an. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Never published in the Meteoritical Bulletin

NWA 7853

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite

Country

Year found

2009

Mass

1100 g

[Museum Collection]

(1) 106.58g

This is 1 of 78 approved meteorites classified as Pallasite. Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

NWA14492

Name

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Structure Class

Stony-Iron

Chemical Class

Pallasite, PMG

Country

Year found

2021

Mass

5.26 kg

[Museum Collection]

(1) 54.9g

History: Robert Cucchiara and Ruben Garcia purchased several kilos of this material from Adam Aaronson at the April gem show in Tucson 2021. Physical characteristics: The meteorite consists of nine pieces: 1710, 1313, 962, 411, 376, 180, 148, 99, and 60 g. The surface is irregular, with visible cm-scale olivine crystals. Terrestrial alteration is evident on the surface and along grain boundaries extending into the interior. Petrography: (C. Herd and P. Hill, UAb) Optical examination of polished slices show angular to subrounded olivine grains ranging from sub-mm to cm in size irregularly distributed in a homogenous metal phase. Sulfide inclusions were noted but not analyzed. Standfieldite was identified by EDS during electron microprobe examination. Geochemistry: (C. Herd and A. Locock, UAb) Data obtained by EMP examination of carbon-coated polished section: Olivine Fa10.8±0.1 (n=17). ICP-MS data obtained from metallic portion, using sample of North Chile (Filomena) as standard (C. Herd, P. Hill, and S. DuFrane UAb): Ni = 10.2, Co = 0.366 (both wt%); Ir = 0.04, Ga = 11.2, As = 10, Sb = 0.16, Ru = 0.6, Pt = 1.1, Cu = 117, Au = 0.37 (all μg/g). W concentration was below detection (

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