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| Sierra Gorda 044 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Sierra Gorda 044 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2017 Country: Chile Mass:  88 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 11567 approved meteorites (plus 23 unapproved names) classified as H5. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 11 Nov 2020 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Sierra Gorda 044 22°30.324’S, 69°02.069’W Antofagasta, Chile Find: 18 Oct 2017 Classification: Ordinary chondrite (H5) History: One fragment of meteorite (88.03 g) was found 18 October 2017 by the UrFU meteorite expedition-2017 in Chile (Pastukhovich A.Yu., Larionov M.Yu., Kruglikov N.A., Kolunin R.N.).) near city Calama. Physical characteristics: Total mass is 88.03 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 (KsK. eniya Dugushkina, RAS-UB). Chondrite with recrystallized texture. Predominantly porphyritic olivine (PO) and porphyritic olivine-pyroxene (POP) chondrules. Weathering grade is W2, moderate oxidation of metal. There is a network of thin metal-troilite shock veins in fractures in olivine and pyroxene. Plagioclase is melted. Shock stage is S4/5. Geochemistry: EDX analyses by K. Dugushkina, RAS-UB. The chondrite paragenesis includes olivine Fa19.3±3.0 (N=17), orthopyroxene En80.7±2.8Fs17.7±2.5Wo1.7±0.4 (N=11), clinopyroxene En49.9±2.1Fs12.7±0.5Wo37.5±2.1 (N=3), plagioclase An20.1±3.3 (N=5), chromite, apatite, troilite, taenite (Ni 8.8-31.3 wt.%) and kamacite (Ni 6.3 wt.%). The average composition of chromite (N=5): Cr2O3 57.0±1.3 wt%, FeO 29.9±0.8 wt%, MgO 3.3±0.4 wt%, Al2O3 5.5±0.2 wt%, TiO2 3.0±0.1 wt%, SiO2 0.8±0.2 wt%, NiO 0.5±0.3 wt%. Classification: (K. Dugushkina, RAS-UB) H5, ordinary chondrite. Specimens: 78.10 g sample and 7.93 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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| Catalogs: |
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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 3440 approved meteorites from Antofagasta, Chile (plus 12 unapproved names) (plus 1 impact crater) This is 1 of 3469 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||||||
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| Revision history: |
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