LL
Name
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Structure Class
Ordinary chondrites
Chemical Class
LL5
Country
Year found
2009
Mass
6.98 kg
[Museum Collection]
(1) 57.7g
History: Purchased by James Tobin in February 2009 from a dealer at the Tucson Gem show Petrography: Easily discerned chondrules and chondrule fragments (up to 2 mm, with 1-1.5 mm diameter not infrequent) in a recrystallized matrix. Contains roughly 1-2% metal, and numerous chromite-plagioclase assemblages. Geochemistry: Olivine (Fa26.1±0.7, N=47); orthopyroxene (Fs22.2±1.0Wo1.7±0.5, N=22); plagioclase feldspar (Ab84.2±1.8Or5.5±2.2, N=5) Classification: Ordinary chondrite (LL5) based on olivine and pyroxene compositions and large chondrule sizes. Specimens: Cascadia holds 186.7 g in multiple pieces, in addition to one polished thin section and a mounted butt
Name
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Structure Class
Ordinary chondrites
Chemical Class
LL4
Country
Year found
2017
Mass
343 g
[Museum Collection]
(1) 10.96g (2) 8.53g
This is 1 of 389 approved meteorites classified as LL4. Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019)
Name
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Structure Class
Ordinary chondrites
Chemical Class
LL6-melt breccia
Country
Year found
2018
Mass
16 kg
[Museum Collection]
(1) 400g
History: Purchased by Aziz Habibi in November 2018 from a Mauritanian dealer. Petrography: (A. Irving and S. Kuehner, UWS) Relatively fresh, shock-modified breccia consisting of clasts of petrographic type 6 and shock stage S1 (largely recrystallized with rare chondrule remnants and stained metal) in a very fine grained to glassy matrix (black to cinnamon-brown in thin section). Geochemistry: Olivine (Fa30.8-31.2, N = 3), orthopyroxene (Fs25.1-25.5Wo2.2-1.6, N = 3), clinopyroxene (Fs10.5-10.6Wo42.9-42.7, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.95. Classification: Ordinary chondrite (LL6 melt breccia). Specimens: 83.5 g including one polished thin section at UWB; remainder with Mr. A. Habibi.
Name
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Structure Class
Ordinary chondrites
Chemical Class
LL7
Country
Year found
2018
Mass
1200 g
[Museum Collection]
(1) 52.27g (2) 36.4g (3) 6.57g
History: The meteorite was purchased from a local meteorite dealer in Algeria. Physical characteristics: Dark-grayish rock with some fusion crust. Petrography: The meteorite displays a thoroughly recrystallized texture of dominantly olivine and orthopyroxene grains with relativey high Wo-contents. Plagioclase grains are up to 150 μm in size. One relict chondrule fragment has been found in the 1 × 1.5 cm section. Classification: Petrologic type 7 based on the equilibrated state of olivine and pyroxene, the large grain size of secondary plagioclase, and the high CaO concentration in low-Ca pyroxene.
Name
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Structure Class
Ordinary chondrites
Chemical Class
LL3.15
Country
Year found
2019
Mass
5.6 kg
[Museum Collection]
(1) 20.38g
History: Purchased by Mbark Arjdal in September 2019 from a dealer in Timbuktu, Mali. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, fairly closely packed, relatively unequilibrated, glass-bearing chondrules (apparent diameter 900 ± 560 µm, N = 23) plus some isolated mineral clasts are set in a sparse opaque matrix rich in kamacite, taenite and troilite. Geochemistry: Olivine (Fa16.2±8.3, range Fa0.6-26.9, N = 9; Cr2O3 in ferroan olivines 0.07-0.55 wt.%, mean 0.25±0.16 wt.%, N = 33), low-Ca pyroxene (Fs14.4±5.0Wo1.5±1.8, range Fs7.4-21.5Wo0.3-4.7, N = 5), subcalcic augite (Fs19.2Wo31.1), diopside (Fs1.2Wo44.5). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.51. Classification: Ordinary chondrite (LL3.15). Chondrule sizes and magnetic susceptibility support an LL rather than L class. Subtype based on Cr2O3 contents of ferroan olivines per Figure 15 of Grossman and Brearley (2005). Specimens: 38.2 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.
Name
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Structure Class
Ordinary chondrites
Chemical Class
LL(L)5
Country
Year found
2021
Mass
1933 g
[Museum Collection]
(1) 68.4g (2) 73.48g (3) 58.09g
History: The meteorite was purchased from a dealer in Morocco. Physical characteristics: Grayish rock partly covered with fusion crust. Petrography: The meteorite shows a light grayish interior and is a brecciated ordinary chondrite with large, still mostly discernable chondrules (apparent mean diameter about 1 mm). The plagioclase grain size is about 60 µm. Some metal and sulfides are present in the matrix. Contains shock melt veins. Geochemistry: The composition of olivine Fa26.3±0.1 (n=4) and orthopyroxene Fs21.9±0.1 (n=4)Wo1.7±0.1 (n=4) are at the limit between that of L and LL groups. Classification: Ordinary chondrite LL(L)5. LL group is favored based on magnetic susceptibility, but the mineral composition is somewhat intermediate between L and LL groups, hence the LL(L) classification.
Name
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Structure Class
Ordinary chondrites
Chemical Class
LL6-melt breccia
Country
Year found
2021
Mass
5.63 kg
[Museum Collection]
(1) 199g (2) 41.7g (3) 23.0g (4) 143g
History: The meteorite was purchased from a dealer in Niger. Physical characteristics: Dark grayish rock without fusion crust. Petrography: Chondritic melt breccia composed of up to 5 cm sized type LL6 fragments set into abundant black melt rock. LL6 fragments contain some relict chondrules and secondary plagioclase has a grain size of about 70 µm. Shock melt is mostly recrystallized and contains characteristic FeNi metal and sufide spherules and entrained mineral fragments. No metal or sulfide veins are observed.
Name
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Structure Class
Ordinary chondrites
Chemical Class
LL6
Country
Year found
2021
Mass
769 g
[Museum Collection]
(1) 27.15g
History: Purchased by Jason Whitcomb in August 2021 from an Algerian dealer. Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Breccia composed of lithic chondrite clasts in a sparse fine grained matrix. The clasts contain some remnant chondrules, but are largely recrystallized and contain sodic plagioclase, kamacite, troilite, chromite and chlorapatite, plus minor secondary barite and calcite. Geochemistry: Olivine (Fa32.0±0.9, range Fa31.1-33.4, N = 6), low-Ca pyroxene (Fs25.6±0.4Wo2.2±0.3, range Fs25.3-26.2Wo1.9-2.5, N = 4), pigeonite (Fs23.0Wo12.9), augite (Fs11.6±0.3Wo42.4±0.1, range Fs11.4-11.8Wo42.3-42.5, N = 2). Classification: Ordinary chondrite (LL6 breccia). Specimens: 24.1 g including one polished thin section at PSF; remainder with Mr. J. Whitcomb.