Meteoritical Bulletin: Entry for Oyo

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Oyo

Basic information

Name: Oyo
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2019
Country: Nigeria
Mass: 1975 g

Classification
history:

Recommended:

LL4 [explanation]

This is 1 of 389 approved meteorites classified as LL4. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 5 Sep 2020

Writeup

Writeup from MB 109:

Oyo 7.877°N, 3.963°E

Oyo, Nigeria

Find: 2019 Jan

Classification: Ordinary chondrite (LL4)

History: Three similar-appearing stones were found together 4.4 km NE of the town of Oyo, Nigeria at 7.877°N, 3.963°E and were purchased from the finder by Mbark Arjdal in January 2019.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Closely packed, well-formed chondrules are set in a sparse matrix containing altered kamacite, taenite, chromite, troilite and merrillite.

Geochemistry: Olivine (Fa_28.3±0.2, range Fa_28.1-28.5, N = 6), low-Ca pyroxene (Fs_23.4±0.5Wo_1.6±0.3, range Fs_23.0-24.3Wo_1.4-2.0, N = 6), augite (Fs_8.3±0.3Wo_45.4±0.1, range Fs_8.0-8.5Wo_45.3-45.5, N = 3). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 3.41.

Classification: Ordinary chondrite (LL4).

Specimens: 54.2 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:

State/Prov/County:	Oyo
Place of purchase:	Nigeria
Date:	2019 Jan
Latitude:	7.877°N
Longitude:	3.963°E
Mass (g):	1975
Pieces:	3
Class:	LL4
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	28.3±0.2
Ferrosilite (mol%):	23.4±0.5
Wollastonite (mol%):	1.6±0.3
Magnetic suscept.:	3.41
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	54.2
Type spec location:	UWB
Main mass:	M. Arjdal
Comments:	Work name Arj ZM 337; submitted by A. Irving

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

Find references in NASA ADS:
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Geography:

Nigeria

Coordinates:
Recommended::	(7° 52' 37"N, 3° 57' 47"E)

Statistics:
This is 1 of 2 approved meteorites from Oyo, Nigeria
This is 1 of 21 approved meteorites from Nigeria

Proximity search:

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