Eucrites
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-unbr
Country
Algeria
Year found
2013
Mass
58 kg
[Museum Collection]
(1) 50.06g
CHRISTIE'S Auction 9-23 Feb 2022 Lot#48
CHRISTIE'S Auction 9-23 Feb 2022 Lot#48
CHRISTIE'S Auction 9-23 Feb 2022 Lot#48
History: An extremely bright fireball was seen by several persons as it moved in an easterly direction over western Algeria in the vicinity of Tindouf at approximately 11 pm on July 17, 2013. No sonic phenomena were documented. Sightings were also made by residents in the Algerian village of Oum el Assel. A search for meteorites was initiated soon after the event, but it was not until April 2014 that a strewnfield was located at 27.120°N, 7.018°W. Subsequently, many fusion-crusted stones were purchased in May 2014 from the finders by Darryl Pitt. Physical characteristics: Fresh stones coated by black fusion crust with numerous anastomozing ridges. Interiors are notable for the bright internal reflections within vitreous plagioclase laths and the unusually abundant, accessory, bronze-colored sulfides. Petrography: (A. Irving and S. Kuehner, UWS) Two studied stones have a subophitic diabasic texture, and exhibit no evidence of deformation or terrestrial alteration. Composed of prismatic exsolved pigeonite grains and calcic plagioclase laths with accessory silica polymorph, Ti-rich chromite, Ti-poor chromite, troilite and ilmenite, plus rare zircon and Ni-free metal. Geochemistry: Low-Ca pyroxene host (Fs57.1-58.0Wo6.2-6.7, FeO/MnO = 29-30, N = 3), high-Ca pyroxene exsolution lamellae (Fs28.1-29.3Wo42.0-41.6, FeO/MnO = 29-31, N = 3), high-Ca pyroxene host (Fs28.1Wo42.3, FeO/MnO = 31), low-Ca pyroxene exsolution lamella (Fs57.6Wo6.4, FeO/MnO = 31), plagioclase (An93.2-94.5Or0.7-0.5, N = 4). Magnetic susceptibility, log χ (× 10-9 m3/kg) = 2.95. Classification: Eucrite (diabasic, unbrecciated). Specimens: 43 g including two polished thin sections at UWB; 51.7 kg (including a 35.9 kg mass) with DPitt and the remainder with anonymous collectors.
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-mmict
Country
Australia
Year found
1984
Mass
25 kg
[Museum Collection]
(1) 106.2g
DISCOVERY OF THE CAMEL DONGA, AUSTRALIA, STONY METEORITE Name: CAMEL DONGA Place of find: Near Camel Donga, on the Nullarbor Plain, Western Australia, Australia. 30°19'S., 126°37'E. Date of find: January, 1984 Class and type: Stone. Achondrite, Ca-rich. Eucrite. Number of individual specimens: 12 (and others) Total weight: 7.6 kg (minimum weight) Circumstances of find: The first stone weighing 503 g was found by Mrs. J.C. Campbell. A further 11 stones were found within 1 km of the original site by B. Mason and W H. Cleverly in July, 1985. Other stones have since been found. Source: W .H. Cleverly, Western Australia School of Mines, Kalgoorlie, Western Australia 6430, Australia.
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-melt breccia
Country
Libya
Year found
2022
Mass
50 kg
[Museum Collection]
(1) 138g (2) 506.7g (3) 1305g
History: Numerous fragments reportedly totalling to almost one metric ton were recovered in Northeastern Libya. Fifty kg of it were subsequently purchased by the main mass holder from a meteorite dealer in Libya. Physical characteristics: Many brownish fragments some of which with small patches of fusion crust. Petrography: Achondritic melt breccia composed of several cm-sized lithic clasts set in abundant recrystallized shock melt. Lithic clasts consist of calcic plagioclase and aggregates of fine-grained, 30-70 µm sized pigeonite crystals displaying patchy compositional zoning. The melt matrix is composed of recrystallized pigeonite displaying mottled compositional zoning and fine-grained, mostly fibrous feldspar. Minor phases include silica, Ti-chromite, ilmenite, and FeS. No metallic iron has been detected. Geochemistry: patchily zoned pigeonite: Fs50.1±1.5Wo11.6±1.7 (Fs48.1-53.4Wo6.9-13.3, FeO/MnO=27-31, n=12); calcic plagioclase: An90.2±0.7 (An88.9-91.3, n=10)
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-mmict
Country
Australia
Year found
1960
Mass
330 kg
[Museum Collection]
(1) 78g
ALL OF THE MILLBILLILLIE, WESTERN AUSTRALIA, STONY METEORITE Name: MILLBILLILLIE Place: On Millbillillie and Jundee Stations, Wiluna district, Western Australia. 26° 27'S, 120° 22'E. Date of fall: October, 1960. Day unknown, but about 1 p.m. local time (0500 GMT). Recovered 1970. Class and type: Stone. Eucrite. Number of individual specimens: At least 3 Total weight: At least 25.4 kg Circumstances of fall: Station workers, F. Vicenti and F. Quadrio, observed a fireball while opening a gate in the boundary fence on the Millbillillie - Jundee track. An object "with sparks coming off it" fell into a spinifex plain to their north. No search was initiated, but D. Vicenti and M. Finch found two stones in this plain in 1970 and 1971. Aboriginals have since found others. The largest stone (20 kg) and one smaller one (565 g) are in the Western Australian Museum. Source: Dr. R. A. Binns, Department of Geology, University of Western Australia.
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-mmict
Country
Year found
2021
Mass
1332 g
[Museum Collection]
(1) 20.892g
History: Found September 2020 by Ahmed Enaji. Purchased May 2021 by Matt Morgan. Physical characteristics: Many identical appearing stones. Tan colored, desert weathered exterior. Saw cuts reveal fragmental breccia of white and gray clasts set in a light gray groundmass. Petrography: (C. Agee and A. Ross, UNM) This meteorite is a monomict breccia with approximately 60% pyroxene and 35% plagioclase. The pyroxene compositions are uniformly consistent with a single cumulate eucrite lithology, indicating monomict eucrite. Pyroxenes are highly equilibrated with distinct high-Ca and low-Ca compositional separation. Minor phases observed were silica, Cr-spinel, ilmenite, and troilite. No metal was detected. Geochemistry: (A. Ross, UNM) Low Ca-pyroxene Fs50.8±1.5Wo3.5±1.7, Fe/Mn=31±1, n=7; high Ca-pyroxene Fs22.5±0.8Wo42.1±0.7, Fe/Mn=30±2, n=5; plagioclase An87±1.7. Classification: Cumulate monomict eucrite Specimens: 22 g including a probe mount on deposit at UNM, Matt Morgan holds the main mass.
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-pmict
Country
(Northwest Africa)
Year found
2001
Mass
6 kg
[Museum Collection]
(1) 4.5g
A. and G. Hupé (xHupé) purchased four stones totalling 2.54 kg from a Moroccan dealer in 2001 October and December, but the total weight of this material including that held by other collectors is estimated to be nearly 6 kg. The stones show distinctive white and grey mineral and lithic clasts in a light tan matrix Classification and mineralogy (A. Irving and S. Kuehner, UWS): polycrystalline clasts include basaltic eucrite (ophitic texture, variable grain size, mainly anorthite + pigeonite Wo16Fs57, FeO/MnO = 30); cumulate eucrite (coarse grained, equigranular, mainly anorthite + exsolved pigeonite with accessory silica); rare eucritic breccias and distinctive ferroan intergrowths (fayalite + hedenbergite + silica ± troilite). Mineral clasts include homogeneous pigeonite grains (Wo15Fs31, FeO/MnO = 26), pigeonite grains with clinopyroxene exsolution lamellae (FeO/MnO = 30–33), anorthitic plagioclase (Ab6-Ab10) and a silica polymorph. Accessory minerals in clasts and matrix include ilmenite, Fe metal, chromite, baddeleyite and apatite. Specimens: type specimen, 20 g, and four polished thin sections, UWS; main mass, xHupé.
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-pmict
Country
(Northwest Africa)
Year found
2010
Mass
400 g
[Museum Collection]
(1) 24.28g
Petrography: (A. Irving and S. Kuehner, UWS): Fresh fragmental breccia composed mostly of cumulate eucrite mineral debris with some polymineralic cumulate eucrite and basaltic eucrite clasts, plus sparse diogenite clasts. Geochemistry: Exsolved pigeonite (lamellae of clinopyroxene within host orthopyroxene), silica, calcic plagioclase, minor fayalitic olivine (Fa84.7-87.1), ilmenite and troilite. In most pigeonite grains the clinopyroxene lamellae are Fs11.5-12.2Wo45.2-44.7 (FeO/MnO = 19.8-24.4) and host orthopyroxene is Fs33.3-33.5Wo1.6-2.2 (FeO/MnO = 27.4-29.3), but in some more ferroan matrix grains the clinopyroxene lamellae are Fs29.0Wo42.3 (FeO/MnO = 32.4) and host orthopyroxene is Fs61.4Wo3.9 (FeO/MnO = 32.1). Orthopyroxene in diogenite clasts is Fs29.4-31.7Wo2.8-4.0 (FeO/MnO = 27.7-28.0).
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-pmict
Country
Morocco
Year found
2011
Mass
5.01 kg
[Museum Collection]
(1) 11.0g (2) 10.3g (3) 3.6g
Petrography: Contains conspicuous dark, angular, fine-grained clasts up to 3 cm across. Its constituent grains within both the groundmass and the dark clasts are finely granulated. In the groundmass, outlines of former relatively coarse crystals are typically still discernible. Geochemistry: Low-Ca pyroxenes FeO/MnO = 29, n = 8. Plagioclase An87-92, n = 8. Within the groundmass, the low-Ca pyroxenes mostly have Mg clustered at 50-51 mol% (5 of 6 analyses; the other has Mg of 44 mol%), but in one of the large dark clasts the low-Ca pyroxenes (2 analyses) have Mg of 57-58 mol%. Classification: Achondrite (polymict eucrite).
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-mmict
Country
(Northwest Africa)
Year found
2012
Mass
1216 g
[Museum Collection]
(1) 6.5g
History: Purchased from a Moroccan dealer by Gary Fujihara and Adam Bates in July 2012. Petrography: (A. Irving and S. Kuehner, UWS) Fresh monomict breccia composed of medium-grained basaltic eucrite clasts. Minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, chromite and troilite. Geochemistry: Orthopyroxene Fs61.1-62.3Wo1.7; FeO/MnO = 31), clinopyroxene exsolution lamellae (Fs26.9-27.6Wo43.2-41.8; FeO/MnO = 28-29). Classification: Eucrite (monomict breccia) Specimens: 27.9 g of sample and one polished thin section are on deposit at UWB. The remaining material is held jointly by Gary Fujihara and Adam Bates.
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-br
Country
(Northwest Africa)
Year found
2010
Mass
326 g
[Museum Collection]
(1) 4.54g (2) 1.20g
History: Numerous individuals up to several cm in size, all partly covered with fusion crust, were bought at a mineral market in Erfoud, Morocco. Petrography: The meteorite is a breccia composed of basaltic lithologies and mineral fragments set into a fine-grained melt-rich matrix. Calcic plagioclase and exsolved pyroxene are dominant minerals; accessories include SiO2 polymorphs, chromite, and troilite. The rock contains abundant recrystallized shock melt. Geochemistry: low-Ca pyroxene, Fs60±0.9Wo2.9±0.7 (Fs58.3-61.3Wo2.2-4.7, n=15, FeO/MnO=30-34); Ca-pyroxene, Fs26.3±1.1Wo43.5±0.4 (Fs23.5-27.2Wo42.9-44, n=15, FeO/MnO=29-35); calcic plagioclase, An90.5±0.7 (An89.5-91.5, n=15)
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite
Country
Year found
2010
Mass
286 g
[Museum Collection]
(1) 24.902g
History: purchased in 2010 by M. Morgan in Morocco Physical characteristics: Physical: One piece covered by thin black fusion crust with signs of weathering Petrography: (Y. Liu, JPL) Light-gray stone consists of subophitic assembly of fine-grained plagioclase and pyroxene. Large anhedral pyroxene and plagioclase grains are also present, forming locally porphyritic texture. Accessory phases include silica phase, troilite, ilmenite and chromite. Geochemistry: Low-Ca pyroxene (Fs60-59Wo2-4, FeO/MnO=30-34) contains pigeonite lamellae (Fs25-29Wo45-40, FeO/MnO=31-34) or vise versa; Plagioclase (An90.7±1.2, n=20). Classification: Eucrite Specimens: 20.9 g at UCLA. The remainder is held by by MtMorgan.
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-melt breccia
Country
(Northwest Africa)
Year found
2016
Mass
650 g
[Museum Collection]
(1) 6.87g
History: The meteorite was bought from a local meteorite dealer in Quarzazate, Morocco. Physical characteristics: Brownish individual without fusion crust. Petrography: The meteorite is a melt breccia composed of up to 5 mm sized basaltic clasts set into shock melted matrix. Basaltic clasts consist of exsolved pyroxenes and often lath shaped calcic plagioclase. The shock melt is mostly recrystallized to plagioclase and pyroxene; some regions show pronounced flow textures. Minor phases include silica, chromite, ilmenite and barite. Geochemistry: low-Ca pyroxene: Fs59.9±0.9Wo4.0±1.3 (Fs57.4-61.1Wo2.2-7.6, n=14, FeO/MnO=33-37); Ca-pyroxene: Fs27.8±1.2Wo42.1±1.2 (Fs26.2-30.1Wo39.7-43.8, n=16, FeO/MnO=33-39); calcic plagioclase: An90.6±0.8 (An89.3-91.9, n=16)
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-unbr
Country
(Northwest Africa)
Year found
2020
Mass
14 kg
[Museum Collection]
(1) 17.1g
History: Purchased January, 2020, by Mark Lyon from a Northwest African dealer Physical characteristics: Single stone with black fusion crust. Interior shows unbrecciated texture with millimeter-sized dark green pyroxenes and white plagioclase crystals. Cut and broken surfaces shows equigranular, medium grained, basaltic texture. Petrography: (A. Ross, UNM; D. Dickens, NMMS; C. Agee, UNM) Microprobe examination of a polished mount shows approximately equal amounts of pyroxene and plagioclase grains often in poikiloblastic arrangement. Some pyroxenes have exsolution. Ubiquitous silica, ilmenite, and troilite. No metal was observed. Geochemistry: (A. Ross, UNM) Low-Ca pyroxene Fs61.7±0.2Wo1.8±0.2, Fe/Mn=33±1, n=7; high-Ca pyroxene Fs29.5±5.0Wo40.0±5.8, Fe/Mn=32±2, n=5; plagioclase An84.7±4.3, n=7; Classification: Achondrite (equilibrated unbrecciated eucrite). Equilibration and clear compositional separation of low-calcium and high-calcium pyroxenes is consistent with type 6 eucrites. Specimens: 28.6 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
HED achondrites
Chemical Class
Eucrite-melt breccia
Country
(Northwest Africa)
Year found
2022
Mass
564 g
[Museum Collection]
(1) 13.06g
History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Grayish rock without fusion crust. Petrography: Eucrite-melt breccia composed of up to 1.5 cm basaltic clasts and up to 0.3 mm sized mineral fragments in fine-grained and mostly recrystallized shock melted matrix. Main minerals are exsolved pyroxenes and calcic plagioclase. Mineral grains entrained in the melt matrix often show resorption textures. Minor phases include silica, chromite, ilmenite, and FeS. No metallic iron has been detected. Contains secondary calcite veins and barite. Geochemistry: low-Ca pyroxene: Fs60.1±0.8Wo2.3±0.1 (Fs59.4-60.5Wo2.1-2.5, FeO/MnO=29-30, n=7); augite exsolution lamellae: Fs24.9±0.2Wo44.5±0.4 (Fs24.5-25.1Wo44.2-45.4, FeO/MnO=28-32, n=7); calcic plagioclase: An90.2±0.9 (An89.6-91.7, n=7)
Name
*click on the Name for more information
Structure Class
HED achondrites
Chemical Class
Eucrite-melt breccia
Country
Year found
2022
Mass
5.85 kg
[Museum Collection]
(1) 86.30g
History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Dark grayish rock with some fusion crust. Petrography: Eucrite-melt breccia composed of up to 3 cm sized basaltic clasts and up to 500 µm sized mineral fragments in black shock melted matrix. Main minerals are exsolved pyroxenes and calcic plagioclase. The shock melt is mostly finely recrystallized and partly displays flow textures. Mineral grains entrained in the melt matrix often show resorption textures. Minor phases include silica, chromite, ilmenite, and FeS. No metallic iron detected. Geochemistry: low-Ca pyroxene: Fs62.5±0.6Wo2.6±0.8 (Fs61.3-63.6Wo1.9-4.6, FeO/MnO=27-30, n=10); high-Ca pyroxene: Fs27.6±0.7Wo43.6±0.7 (Fs26.3-28.7Wo42.2-44.9, FeO/MnO=27-32, n=10); calcic plagioclase: An87.1±1.0 (An85.4-88.9, n=10).