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| Calama 080 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Calama 080 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2017 Country: Chile Mass:  148.5 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 6432 approved meteorites (plus 2 unapproved names) classified as H4. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 23 Feb 2020 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Calama 080 22º27.941’S, 68º38.858’W Antofagasta, Chile Find: 2017 Oct 24 Classification: Ordinary chondrite (H4) History: Two fragments of meteorite (138.25 and 10.27 g) were found 24 October 2017 by the UrFU meteorite expedition-2017 in Chile (Pastukhovich A.Yu., Larionov M.Yu., Kruglikov N.A., Kolunin R.N.) near Chiu-Chiu. Physical characteristics: Total mass is 148.52 g. The meteorite has roughly rounded shape. Exterior of the stone is desert polished. The surface and interior of the meteorite is light to dark-brown in color due to Fe-hydroxides. No fusion crust was observed. Petrography: Classification (K. Dugushkina and S. Berzin, RAS-UB). The meteorite consists mostly of a fine-grained, inequigranula,r recrystallized matrix and chondrules (15%). Chondrite consists of olivine 60%, orthopyroxene 15%, clinopyroxene 7-10%, plagioclase 5-7%, chromite 1-2%, troilite 4-6%, Fe-Ni-metal 3-5%, with accessory apatite. Predominately porphyritic olivine (PO) and porphyritic olivine-pyroxene (POP) chondrules. Chondrules have vague boundaries. Minor oxide rims around metal and troilite, minor oxide veins (weathering grade - W1). Meteorite is very weakly shocked. There are no opaque melt veins or melt pockets. Shock stage is 1-2. A xenolith with a size of 1.5 × 2.5 mm and an angular shape was found, consisting mostly of orthopyroxene En81±0.5Fs18±0.4Wo1±0.3 (N=12) with rounded inclusions of olivine (Fa 20±0.3%) and a small amount of mesostasis. The mesostasis is 5-7 vol% and composed of plagioclase and clinopyroxene. Geochemistry: Clinopyroxene En51±1.4Fs15±0.1Wo41±1.5 (N=7), plagioclase An16±0.04 (N=12), chromite, apatite, troilite, kamacite (Ni 5.8-6.5 wt%). The composition of chromite: Cr2O3 58.4%, TiO2 2.7%, Al2O3 6.04%, FeO 27.7%, MgO 4.7%, SiO2 0.5%. The average composition of orthopyroxene from xenolith (N=12): SiO2 56.4±0.2%, MgO 30.6±0.3%, FeO 11.9±0.2%, MnO 0.5±0.1%, CaO 0.6±0.1%, Cr2O3 ?0.1%. Classification: (K. Dugushkina, RAS-UB) H4, ordinary chondrite. Specimens: 129. 32 g in 2 samples, plus 19.2 g cut-off and thin section, UrFU | ||||||||||||||||||||||||||||||||||||||
| Data from: MB109 Table 0 Line 0: |
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| Institutions and collections |
UrFU: Ural Federal University, 620002, 19 Mira street, Ekaterinburg, Russia (institutional address; updated 14 Jan 2015) RAS-UB: Zavaritsky Institute of Geology and Geochemistry Russian Academy of Sciences, Ural Branch 15 Akademika Vonsovskogo str., Ekaterinburg, 620016, Russia (institutional address; updated 19 Apr 2018) |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 2908 approved meteorites from Antofagasta, Chile (plus 10 unapproved names) (plus 1 impact crater) This is 1 of 2937 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||||||
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