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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:
Recommended:  H4-an    [explanation]

This is 1 of 14 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 (bredfild@mail.ru)
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 Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:

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

Statistics:
     This is 1 of 1750 approved meteorites from Antofagasta, Chile (plus 5 unapproved names) (plus 1 impact crater)
     This is 1 of 1778 approved meteorites from Chile (plus 11 unapproved names) (plus 1 impact crater)
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