CO
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3.8
Country
Year found
1970
Mass
23 kg
[Museum Collection]
(1) 1.21g
This is 1 of 3 approved meteorites classified as CO3.8. 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. 53, Meteoritics 10, 133-158 (1975)
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3.6
Country
Year found
2006
Mass
3.76 kg
[Museum Collection]
(1) 5.940g (2) 4.342g
History and physical characteristics: (G. Raade and K. Ødegaard, UOslo; M. Bilet, NorAS) At about 10:20 am on July 14, 2006, a bright fireball traveling SSE-NNW was witnessed by many people and a loud explosion and a rumbling sound was heard in the air above Moss and Rygge in south Norway, on the east side of the Oslofjord. Shortly after, a small meteorite was heard to land on an aluminum sheet and was recovered. Extensive searches in the area have resulted in the recovery of a total of 5 stones (Table 6). Note that light rainfall occurred in the area on July 29, 30, and 31. Petrography: (J. Grossman, USGS; G. MacPherson, SI; L. Chizmadia, UHaw; A. Rubin, UCLA): Contains abundant small chondrules (most < 200 μm), small (
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3.5
Country
Year found
2006
Mass
1310 g
[Museum Collection]
(1) 25.8g
This is 1 of 12 approved meteorites classified as CO3.5. Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008) Published in Meteoritical Bulletin, no. 113, in preparation (2024)
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3
Country
Year found
2008
Mass
2.67 kg
[Museum Collection]
(1) 12.2g
This is 1 of 662 approved meteorites (plus 2 unapproved names) classified as CO3. Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3
Country
Year found
2011
Mass
1836 g
[Museum Collection]
(1) 394g
This is 1 of 642 approved meteorites (plus 1 unapproved name) classified as CO3. Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Name
*click on the Name for more information
Structure Class
Carbonaceous chondrites
Chemical Class
CO3
Country
Year found
2009
Mass
134 g
[Museum Collection]
(1) 6.7g
History: Purchased by Blaine Reed in September 2009 from a Moroccan dealer at the Denver Mineral Show. Petrography: (A. Irving and S. Kuehner, UWS) Relatively small chondrules (apparent diameter up to 500 μm, mean 150 μm) and small CAI are set in a much finer grained matrix (~30 vol.%) containing accessory kamacite. Geochemistry: Olivine (Fa0.5-46.7 Cr2O3 in ferroan examples = 0.07-0.20, mean 0.11±0.06 wt.%, N = 7), orthopyroxene (Fs1.6-3.7Wo0.8-0.9, N = 3), subcalcic augite (Fs26.6Wo36.3), diopside (Fs1.0Wo44.3). Classification: Carbonaceous chondrite (CO3). Specimens: 20.3 g including one polished thin section and a polished slice at PSF; main mass with Reed.
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3
Country
Year found
2013
Mass
652 g
[Museum Collection]
(1) 6.1g
History: Purchased by Eric Twelker in February 2013 from a Moroccan dealer at the Tucson Gem and Mineral Show. Petrography: (A. Irving and S. Kuehner, UWS) Small chondrules (mostly 0.2-0.6 mm, some up to 1.5 mm) and fine-grained CAI (composed of hibonite and spinel, with rims of aluminous clinopyroxene) in a dark brown, stained matrix. Minor pentlandite occurs in the matrix. Geochemistry: Olivine (Fa0.3-39.1; Cr2O3 in ferroan olivine 0.06-0.15 wt.%, mean 0.09 wt.%, s.d. 0.03 wt.%, N = 7), orthopyroxene (Fs1.3-8.9Wo4.3-2.8), clinopyroxene (Fs1.4Wo38.6; Fs1.3Wo48.8; Fs16.9Wo53.0). Classification: Carbonaceous chondrite (CO3). Subtype is estimated to be 3.5 on the basis of the narrow distribution of Cr2O3 in ferroan olivine. Specimens: 22.3 g and one polished thin section are at UWB. The remainder is held by Twelker.
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3.2
Country
Year found
2013
Mass
986 g
[Museum Collection]
(1) 19.3g
History: Purchased by Sean Tutorow from a Moroccan dealer in Quartzsite, Arizona, January 2013. Physical characteristics: Three pieces that fit together, partial black fusion crust, saw cut reveals many sub-mm chondrules and sparse small CAIs set in a dark gray-brown matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous, small (50-400 μm) unequilibrated chondrules, many are porphyritic, fine grained matrix makes up approximately 30% of this meteorite. Melilite, anorthite, Ti-rich aluminous diopside, aluminous diopside, aluminous enstatite, aluminous low-Ca pyroxene, augite, troilite and Fe-Ni metal detected. Geochemistry: (C. Agee and N. Muttik, UNM) Type I chondrules: olivine Fa1.3±0.4, n=7; enstatite Fs1.9.±1.7Wo0.8±1.6, n=6. Type II chondrules: olivine Fa31.5±17.6, Fe/Mn=91±26, Cr2O3=0.14±0.09 wt%, n=23; low-Ca pyroxene Fs5.5±4.3Wo1.6±1.3, n=6. Classification: Carbonaceous chondrite (CO3.2). Type 3.2 based on mean value and sigma of Cr2O3 in ferroan chondrule olivines, as given by Grossman and Brearley (2005). Specimens: 21 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3
Country
Year found
2017
Mass
397 g
[Museum Collection]
(1) 1.6g
History: Discovered by an anonymous person an purchased in Erfoud in April 2017 Petrography: (R. Bartoschewitz, Bart) Chondrules (avaerage ~ 200 µm), chondrule fragments, and CAIs are embedded in a fine-grained brownish matrix (about 20 vol%). Magnetic susceptibility logc=4.10. Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Random measurements of olivine grains revealed Fa37.8±2.9 (Fa29.2-44.8), n=24; feldspar An60Ab38 (n=1). Taenite Ni=38.4, Co=0.4 wt.-% (n=1). Classification: Carbonaceous chondrite (CO3, S1) Specimens: 20.2 g on deposit at Kiel, main mass anonymous
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3
Country
Year found
2019
Mass
2.02 kg
[Museum Collection]
(1) 51.24g (2) 41.92g
History: The meteorite was purchased from a local meteorite dealer in Algeria. Physical characteristics: Brownish fragment without fusion crust. Petrography: The meteorite shows a dark brownish to black interior and is composed of abundant small chondrules, CAIs, and mineral fragments set into a fine-grained matrix. Chondrules are dominantly porphyritic type I with a mean diameter of about 0.2 mm. Some sulfides and FeNi metal are present in matrix and chondrules.
Name
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Structure Class
Carbonaceous chondrites
Chemical Class
CO3
Country
Year found
2022
Mass
456 g
[Museum Collection]
(1) 16.59g
History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Brownish rock without fusion crust. Petrography: The meteorite shows a dark brownish to reddish interior and is predominantly composed of abundant small chondrules, CAIs, and mineral fragments set into an abundant fine-grained matrix. Chondrules have a mean diameter of about 0.2 mm. Few chondrules are surrounded by fine-grained rims. Opaque phases are partly altered metal and troilite.