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Toconao 007
Basic information Name: Toconao 007
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2019
Country: Chile
Mass:help 134 g
Classification
  history:
Recommended:  LL6    [explanation]

This is 1 of 2861 approved meteorites (plus 2 unapproved names) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 31 Oct 2021
Writeuphelp
Writeup from MB 110:

Toconao 007        22°58.994’S, 68°18.389’W

Antofagasta, Chile

Find: 26 Oct 2019

Classification: Ordinary chondrite (LL6)

History: The meteorite (1 piece) was found in autumn 2019 by Atali Agakhanov during a meteorite searching expedition organized by Timur Kryachko.

Physical characteristics:  Total mass is about 134 g. The interior of meteorite are dark grey with brown shade and surface are dark brown.

Petrography: (K.A. Konovalova, FMMR). Petrographic observation of a polished section shows that meteorite consist of coarse grain matrix. The mineral matrix are olivine, low-Ca pyroxene, high-Ca pyroxene and large crystals of plagioclase (size up to 250 µm). This feauteres indicate about a petrological type 6. Olivine has undulatory extinction (shock stage S2).

Geochemistry: Mineral composition and Geochemistry: EDS analyses (A. Agakhanov, K. Konovalova, FMMR). Olivine Fa27.19±1.72 (N=27), Low-Ca pyroxene Fs23.0±0.8Wo1.60±0.28 (N=17), high-Ca pyroxene Fs15.9±1.7Wo45.14±0.91 (N=5), plagioclase Ab76.5An15.6Or7.6 (N=3). Composition of taenite (in wt. %, n = 2): Fe - 78.26, 22.73, 1.75

Classification: (Kseniya A. Konovalova, FMMR). Ordinary chondrite. LL6, S2W2.

Specimens: Atali Agakhanov holds main mass. 22 g and thin section - FMMR

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Origin or pseudonym:plain
Date:26 Oct 2019
Latitude:22°58.994’S
Longitude:68°18.389’W
Mass (g):134
Pieces:1
Class:LL6
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):27.19±1.72 (N=27)
Ferrosilite (mol%):23.0±0.8 (N=17)
Wollastonite (mol%):1.60±0.28 (N=17)
Classifier:K. A. Konovalova, FMMR
Type spec mass (g):22
Type spec location:FMMR
Main mass:Atali Agakhanov
Finder:Atali Agakhanov
Comments:Field name is MA026; submitted by Kseniya A. Konovalova, spacelikeyou@yandex.ru
Institutions
   and collections
FMMR: Fersman Mineralogical Museum, Leninskiy prospekt 18 korpus 2, Moscow, Russia, 119071, Russia; Website (institutional address; updated 24 Feb 2018)
Catalogs:
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:

Chile
Coordinates:
     Recommended::   (22° 59' 0"S, 68° 18' 23"W)

Statistics:
     This is 1 of 2320 approved meteorites from Antofagasta, Chile (plus 9 unapproved names) (plus 1 impact crater)
     This is 1 of 2349 approved meteorites from Chile (plus 15 unapproved names) (plus 1 impact crater)
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