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Chug Chug 019
Basic information Name: Chug Chug 019
     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 5 g
Classification
  history:
Meteoritical Bulletin:  MB 109  (2021)  H4-an
Recommended:  H4-an    [explanation]

This is 1 of 24 approved meteorites classified as H4-an.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 5 Apr 2020
Writeuphelp
Writeup from MB 109:

Chug Chug 019        22°29.46’S, 69°07.57’W

Antofagasta, Chile

Find: 27 Oct 2018

Classification: Ordinary chondrite (H4, anomalous)

History: one piece of meteorite (field number 4-57) was found in the the desert by Mr. T. V. Kryachko.

Physical characteristics: a sample of meteorite has a brown fusion crust.

Petrography: M. A. Ivanova (Vernad) Meteorite consists of well-defined chondrules, 0.34±0.21 cm in size, embedded in matrix enriched in Fe-oxides. POP and PP chondrules are abundand, BO and PR are rare; minerals are olivine, pyroxene, Fe,Ni-metal and iron oxides, sulfide, quartz, phosphate, carbonate and chromite. Glass of plagioclase composition occurs in chondrules. Shock stage is S1, weathering grade is W3.

Geochemistry: Mineral compositions and geochemistry: M. A. Ivanova. Olivine Fa10.2±0.28 (N=39), orthopyroxene Fs11.6±4.44; Wo0.64±0.47, Fe/Mn = 21.2±8.7 (N=32) , clinopyroxene is represented by pigeonite : Fs29-32Wo8-12 and augite Fs3-4Wo37-43; plagioclase glass in chondrule has a variable composition: Ab44-88Or0.7-13; Fe,Ni-metal contains 4.0-15.7 wt% Ni, 0.48±0.04 wt% Co; sulfide is represented by troilite. Oxygen isotopic composition (OU): δ17O = 3.100, δ18O 4.589, Δ17O = 0.714; δ17O 3.083, δ18O = 4.605, Δ17O 0.688 (all ‰).

Classification: based on chondrules size (0.34 ± 0.21 cm), very reduced silicates compared to H chondrite (Fa10), Co content (0.48 wt.%) in low-Ni Fe,Ni-metal and oxygen isotopic composition, this meteorite is an anomalous H chondrite. Based on homogeneous olivine composition but very clear boundaries of chondrules and variable low-Ca pyroxene composition, petrological type should be 4.

Specimens: individual sample of meteorite (1.54 g) and 1 polished section are deposited in Vernad.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Antofagasta
Origin or pseudonym:Desert
Date:27 Oct 2018
Latitude:22°29.46'S
Longitude:69°07.57'W
Mass (g):5
Pieces:1
Class:H4-an
Shock stage:S1
Weathering grade:W3
Fayalite (mol%):10.2±0.28 (N=39)
Ferrosilite (mol%):11.6±4.44 (N=32)
Wollastonite (mol%):0.64±0.47 (N=32)
Classifier:M. A. Ivanova, Vernad
Type spec mass (g):1.54
Type spec location:Vernad
Main mass:Vernad
Finder:Mr. T. V. Kryachko ([email protected])
Comments:Submitted by Marina Ivanova
Plots: O isotopes:  
Institutions
   and collections
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J., Bouvier A., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.
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Geography:

Chile
Coordinates:
     Recommended::   (22° 29' 28"S, 69° 7' 34"W)

Statistics:
     This is 1 of 3583 approved meteorites from Antofagasta, Chile (plus 12 unapproved names) (plus 1 impact crater)
     This is 1 of 3612 approved meteorites from Chile (plus 13 unapproved names) (plus 1 impact crater)
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