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Ain Ben Tili 002
Basic information Name: Ain Ben Tili 002
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2023
Country: Mauritania
Mass:help 1000 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  CK4
Recommended:  CK4    [explanation]

This is 1 of 128 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 21 Oct 2023
Writeuphelp
Writeup from MB 112:

Ain Ben Tili 002        25.89954°N, 9.85673°W

Tiris Zemmour, Mauritania

Purchased: 2023

Classification: Carbonaceous chondrite (CK4)

Petrography: (K. Metzler, IfP) Chondrules, chondrule fragments, and CAIs are embedded in a recrystallized black matrix, which is interspersed with magnetite grains and nodules. The range of apparent sizes of most chondrules is 0.5-1.0 mm (up to 1.8 mm). Chondrules with igneous rims are frequently observed. Small amounts of pentlandite are present.

Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa32.2±0.4 (Fa31.6-32.9); mean NiO concentration: 0.71 wt%; n=12. Mean composition of low- Ca pyroxene: Fs26.0±1.1 Wo2.1±1.8 (Fs24.4-28.3 Wo0.7-4.9); n=13. Mean composition of Ca-rich pyroxene: Fs12.5±3.6 Wo47.3±1.6 (Fs7.5-19.1 Wo43.8-48.9); n=11. Magnetite shows significant concentrations of elements other than Fe (wt%; mean values): MgO=0.24; Al2O3=1.85; Cr2O3=5.36; NiO=0.37 (n=6).

Classification: CK chondrite based on texture and mineral chemistry. Petrologic type 4 based on the equilibrated state of olivine and the chemical variation of pyroxene.

Data from:
  MB112
  Table 0
  Line 0:
State/Prov/County:Tiris Zemmour
Place of purchase:Mauritania
Date:P 2023
Latitude:25.89954°N
Longitude:9.85673°W
Mass (g):1000
Pieces:Several
Class:CK4
Shock stage:C-S3
Weathering grade:Moderate
Fayalite (mol%):32.2±0.4
Ferrosilite (mol%):26.0±1.1; 12.5±3.6
Wollastonite (mol%):2.1±1.8; 47.3±1.6
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Said Muftah Bachir, Western Sahara
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Photos:
CreditPhotos
Public domain photographs:
Knut Metzler      
Geography:

Mauritania
Coordinates:
     Recommended::   (25° 53' 58"N, 9° 51' 24"W)

Statistics:
     This is 1 of 29 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 224 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
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