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Sierra Gorda 022
Basic information Name: Sierra Gorda 022
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2018
Country: Chile
Mass:help 97.2 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  L5
Recommended:  L5    [explanation]

This is 1 of 7217 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Sep 2019
Writeuphelp
Writeup from MB 108:

Sierra Gorda 022        22°30.042’S, 69°01.475’W

Antofagasta, Chile

Find: 30 Mar 2018

Classification: Ordinary chondrite (L5)

History: Meteorite (1 piece) was found on March 30 2018 by Ilya Chaplygin during desert meteorite search organized by Timur Kryachko. Date of fall is unknown.

Physical characteristics: Single stone of rounded shape almost completely covered with black fusion crust. Broken part is brown. Fresh cut shows light gray-brown interior. Bottom part is covered with light-colored desert material.Dimentions 10,5x15x8,5 cm.

Geochemistry: Mineral composition and Geochemistry: EDS-WDS analyses (V.I. Taskaev, IGEM RAS). The primary chondrite paragenesis includes olivine Fa24.41±1.09 (N=7), orthopyroxene Fs20.1±1.04Wo1.54±0.38 (N=9), plagioclase Ab78.5An14.8Or6.5 (N=8), chromite-spinel Crt72Spl10.9Usp7.72 (n=2). Composition of kamacite (in wt., %, N=5): Fe 91.44, Ni ? 6.27 , Co ? 1.02 and taenite (in wt., %, N=3): Fe 61.1, Ni ? 37.92 , Co ? 0.42. Troilite is close to FeS.

Classification: (Pavel Yu. Plechov, FMMR). Ordinary chondrite. L5, S1, W1

Specimens: Mr. I. Chaplygin holds main mass 97.15 g. 20 g and thin section ? FMMR.

Data from:
  MB108
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Origin or pseudonym:plain
Date:30 Mar 2018
Latitude:22°30.042'S
Longitude:69°01.475'W
Mass (g):97.15
Pieces:1
Class:L5
Shock stage:S1
Weathering grade:W1
Fayalite (mol%):24.41±1.09 (N=7)
Ferrosilite (mol%):20.1±1.4 (N=9)
Wollastonite (mol%):1.54±0.38 (N=9)
Classifier:Pavel Yu.Plechov, FMMR
Type spec mass (g):20
Type spec location:FMMR
Main mass:Ilya Chaplygin
Finder:Mr. I. Chaplygin
Comments:field name is 003i; FMM name is FN331; analyst V.I. Taskaev, IGEM RAS, Moscow; submitted by Pavel Yu. Plechov, FMMR; submitted by Pavel Yu. Plechov, pplechov@gmail.com
Institutions
   and collections
USP: Miriam Della Posta de Azevedo Museu de Geociências - USP Rua do Lago, 562 CEP: 05508-080 Butantã - SP Brazil, Brazil; Website (institutional address; updated 21 Jan 2019)
IGEM: Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetny Per., 35, Moscow, 119017 , Russia (institutional address; updated 16 Dec 2010)
FMMR: Fersman Mineralogical Museum, Leninskiy prospekt 18 korpus 2, Moscow, Russia, 119071, Russia; Website (institutional address; updated 24 Feb 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Photos:
CreditPhotos
Public domain photographs:
Pavel Plechov   
Geography:

Chile
Coordinates:
     Recommended::   (22° 30' 3"S, 69° 1' 28"W)

Statistics:
     This is 1 of 2063 approved meteorites from Antofagasta, Chile (plus 5 unapproved names) (plus 1 impact crater)
     This is 1 of 2091 approved meteorites from Chile (plus 12 unapproved names) (plus 1 impact crater)
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