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Sierra Gorda 044
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:help 88 g
Classification
  history:
Recommended:  H5    [explanation]

This is 1 of 10297 approved meteorites (plus 45 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
Writeuphelp
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:
State/Prov/County:Antofagasta
Origin or pseudonym:limestone deflation plain
Date:18 Oct 2017
Latitude:22°30.324'S
Longitude:69°02.069'W
Mass (g):88.03
Pieces:1
Class:H5
Shock stage:S4/5
Weathering grade:W2
Fayalite (mol%):19.3±3.0 (N=17)
Ferrosilite (mol%):17.7±2.5 (N=11)
Wollastonite (mol%):1.7±0.4 (N=11)
Classifier:K. Dugushkina, RAS-UB
Type spec mass (g):88.03
Type spec location:UrFU
Main mass:UrFU
Finder:UrFU meteorite expedition - Chile-2017 (Pastukhovich A.Yu., Larionov M.Yu., Kruglikov N.A., Kolunin R.N.).
Comments:Field name Past-9; analysts - Kseniya Dugushkina (RAS-UB); submitted by Kseniya Dugushkina (RAS-UB).; submitted by Kseniya Dugushkina (RAS-UB)
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:

Chile
Coordinates:
     Recommended::   (22° 30' 19"S, 69° 2' 4"W)

Statistics:
     This is 1 of 2081 approved meteorites from Antofagasta, Chile (plus 5 unapproved names) (plus 1 impact crater)
     This is 1 of 2109 approved meteorites from Chile (plus 12 unapproved names) (plus 1 impact crater)
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