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| Chug Chug 086 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Chug Chug 086 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2019 Country: Chile Mass:  14.6 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 21 approved meteorites classified as Chondrite-ung. [show all] Search for other: Ungrouped chondrites | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 20 Mar 2021 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Chug Chug 086 22°29.66’S, 69°07.07’W Antofagasta, Chile Find: Oct. 2019 Classification: Ungrouped chondrite History: one piece of meteorite (field number Chug-Chug 6-8) was found in the desert of Chile by Mr. T. V. Kryachko. Physical characteristics: a sample of meteorite has a brown fusion crust. Petrography: M. A. Ivanova (Vernad.) Meteorite consists of well-defined chondrules (~90%) and matrix (~10%), average size of chondrule is 283±270 μm, several chondrules, up to 4 mm, also occur. POP, OP and PP chondrules are abundant, BO and PR chondrules are rare; one Al-rich chondrule occurs in the section; CAIs are absent. Minerals are olivine, pyroxene, Fe,Ni-metal, troilite, silica, schreibersite, chromite and products of terrestrial weathering. Glass of plagioclase composition sometimes occurs in chondrules. Shock stage is S1, weathering grade is W3. Petrological type is 4, since olivine is homogeneous and chondrules are well delineated. However, glass in some chondrules indicates petrological type 3. Geochemistry: Mineral compositions and geochemistry: M. A. Ivanova Olivine: Fa 2.13±0.08 (N=41), orthopyroxene: Fs 12.3±5.00 (N=38); Wo 1.21±1.20 (N=38), Fe/Mn = 21.2 ± 8.7 (N=38) , clinopyroxene is represented by pigeonite: Fs 10.5-27.5, Wo 6.6-14.8, augite Fs 2.6-22.4, Wo 30.3-43.7 and diopside Fs 1.0-9.2, Wo 46.0-49.6; plagioclase glass in chondrule has variable composition: Ab 9.7-83.4, Or 0.13-17.4; Fe,Ni-metal contains 6.37 wt% of Ni, 0.46 wt% of Co; sulfide is troilite. Oxygen isotopic composition (OU): δ17O 2.923, 2.949; δ18O 4.312, 4.464; Δ17O 0.714681, 0.628 (permil). Classification: based on very reduced and homogeneous olivine composition (Fa2.13 ± 0.08) and orthopyroxene of variable composition (Fs3.4-22.5), this meteorite is ungrouped chondrite, although its oxygen isotopic composition, average chondrule size and Co content in kamacite are in the range of H chondrite. Homogeneous olivine, well-delineated chondrules and presence of glass in chondrules make difficult to determine petrological type of this chondrite. Specimens: a fragment of meteorite (3.9 g) and 1 polished section are deposited in Vernad. | ||||||||||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||||||||||
| Institutions and collections |
OU: Planetary and Space Sciences
Department of Physical Sciences
The Open University
Walton Hall
Milton Keynes
MK7 6AA
United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011) Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016) |
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| References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:
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Statistics: This is 1 of 2963 approved meteorites from Antofagasta, Chile (plus 10 unapproved names) (plus 1 impact crater) This is 1 of 2992 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||||||
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