Chwichiya 005 CO3 Carbonaceous Chondrite Meteorite 0.3 gram part slice

Description

CHWICHIYA 005
CO3 CARBONACEOUS ORNANS TYPE
PRIMITIVE CHONDRITE METEORITE
0.3 GRAM PART SLICE
CHWICHIYA IS FAMOUS FOR BEING ONE OF THE OLDEST SURFACES IN WESTERN SAHARA.
MANY METEORITES HAVE BEEN DISCOVERED IN THIS DENSE COLLECTION AREA OVER THE PAST DECADE.
THIS METEORITE WAS FOUND BY IKEN MOHAMED WITH COORDINATES (27° 14' 23"N, 11° 40' 7"W)
CLASSIFIER ANTHONY LOVE ESTIMATED THE SUB-TYPE TO BE A SUPER EARLY PRIMITIVE CO3.1
LOW TKW CONSISTS OF A SINGLE TRIANGULAR SHAPED 249 GRAM INDIVIDUAL.
POLISHED ON ONE SIDE.
OFFICIAL CLASSIFICATION DATA SOURCE:
The Meteoritical Society
International Society for Meteoritics and Planetary Science
Lunar and Planetary Institute
Meteoritical Bulletin Database
Chwichiya 005
Basic information
Name:
Chwichiya 005
This is an OFFICIAL meteorite name.
Abbreviation:
There is no official abbreviation for this meteorite.
Observed fall:
No
Year found:
2019
Country:
Western Sahara
Mass:
249 g
Classification
history:
Recommended:
CO3
This is 1 of 616 approved meteorites (plus 1 unapproved name) classified as CO3.
Comments:
Approved 2 Aug 2020
Writeup
Writeup from MB 109:
Chwichiya 005
27º14.39? N, 011º 40.12?W
Saguia el Hamra, Western Sahara
Find: 2019
Classification: Carbonaceous chondrite (CO3)
History
: A single 249 g stone was found by Iken Mohamed in the Saguia el Hamra region of Western Sahara in 2019. John Higgins purchased the stone from Mohamed Elguirah in 2020.
Physical characteristics
: Sample is dark brown in color, has a triangular profile with a rounded convex face and a flat bottom. The convex face is weathered and shows and irregular pattern of fractures. The cut face shows abundant small chondrules in a dark brown matrix.
Petrography
: Description and classification (A. Love,
App
): Sample shows chondritic texture composed of chondrules with an average apparent diameter 208 µm (n=60), fragments mineral grains and abundant refractory inclusions, abundant sulfide and weathered metal set within a fine-grained, opaque matrix. Additional minerals are: plagioclase, Si-polymorph, troilite and oxidized FeNi metal.
Geochemistry
: (A. Love,
App
) Olivine, Fa
22.5±16.0
(Fa
0.9-52.0
), n=18. Cr
2
O
3
Wt% in type II chondrules - 0.4±0.2, n=15); low-Ca pyroxene, Fs
4.7±3.8
Wo
1.2±1.0
(Fs
0.7-8.2
Wo
0.3-1.6
, n=11); pigeonite, Fs
3.5-5.8
Wo
7.4-5.3
, n=2.
Classification
: Carbonaceous chondrite (CO3, C-S2, W3) Based on texture, chondrule diameter and magnetic susceptibility this sample is an CO chondrite.
Specimens
: John Higgins holds the main mass. An end cut, several smaller slices and fragments that comprise the 23.55 g type specimen and a polished thin section and mount are on deposit at
App
.
Data from:
MB109
Table 0
Line 0:
State/Prov/County:
Saguia el Hamra
Place of purchase:
Morocco
Date:
2019
Latitude:
27º14.39' N
Longitude:
011º 40.12'W
Mass (g):
249
Pieces:
1
Class:
CO3
Shock stage:
C-S2
Weathering grade:
high
Fayalite (mol%):
22.5±16.0
Ferrosilite (mol%):
4.7±3.8
Wollastonite (mol%):
1.2±1.0
Magnetic suscept.:
4.92
Classifier:
A. Love, App
Type spec mass (g):
23.55
Type spec location:
App
Main mass:
John Higgins
Finder:
Iken Mohamed
Comments:
Submitted by Anthony Love
Institutions
and collections
Department of Geology Appalachian State University
Catalogs:
References:
Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Photos:
Credit
Photos
Photos uploaded by members of the
EOM
Robert Smart
Geography:
Coordinates:
Recommended:
:
(27° 14' 23"N, 11° 40' 7"W)
GUARANTEED AUTHENTICITY
Member of the Meteoritical Society & International Meteorite Collectors Association #9822 The authenticity of this meteorite has a 100% guarantee. Signed Certificate of Authenticity Included. First class delivery and provenance provided exhibiting important details of the classification & petrography.
1cm scale cube is for reference purposes and not included with the meteorite.
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