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Grizim 001
Basic information Name: Grizim 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 3.9 kg
Meteoritical Bulletin:  MB 111  (2023)  R3
Recommended:  R3    [explanation]

This is 1 of 73 approved meteorites classified as R3.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 23 Jul 2022
Writeup from MB 111:

Grizim 001        25º57.7167N, 1º30.6667W

Adrar, Algeria

Purchased: 2021

Classification: Rumuruti chondrite (R3)

History: Many small specimens plus four masses weighing 122, 119, 112, and 97 g were found by meteorite prospectors while they were trying to find the Erg Chech 002 meteorites. Adrian Contreras Gomez (CRATER meteorites) purchased the samples in Tindouf, Algeria, on August 24, 2021, from Mostafa Hnini.

Physical characteristics: Samples have an irregular shape and a dark brown exterior and interior. The cut face shows a chondritic texture lacking metal. Type specimen shows one small patch of relict fusion crust.

Petrography: Description and classification (A. Love, App) Sample shows brecciated chondritic texture composed of ~45 vol% distributed, distinct chondrules and fragments w/in a partially transparent (olivine dominant) matrix. Some chondrule glass exists. Average diameter of chondrules is 430 μm, n=77. Additional minerals are: chromite and phosphates. FeS minerals are completely altered.

Geochemistry: (A. Love, App) Olivine chondrules (Fa23.8±13.1, Fe/Mn=64.8±24.5, NiO=0.1±0.0 CV%= 56, n=19), matrix (Fa43.5±0.3, Fe/Mn=87.7±3.5, NiO=0.1±0.1, n=3); low Ca pyroxene (Fs15.0±9.6Wo1.4±1.8, Fe/Mn=30.0±20.9, n=20).

Classification: Rumurutiite Chondrite (R3, C-S2). Rumuruti chondrite based on: chondrule diameter; matrix abundance and composition; and lack of CAIs. Estimated subtype R3.4 based on CV%

Specimens: Adrián Contreras Gómez (CRATER meteorites) holds the 122 g mass. A polished thin section and an individual weighing 26.15 g are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2021
Mass (g):3.9kg
Shock stage:C-S2
Weathering grade:moderate
Fayalite (mol%):23.8±13.1
Ferrosilite (mol%):15.0±9.6
Wollastonite (mol%):1.4±1.8
Magnetic suscept.:3.41
Classifier:A. Love, App
Type spec mass (g):26.15
Type spec location:App
Main mass:Adrián Contreras Gómez (CRATER Meteorites)
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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     Recommended::   (25° 57' 43"N, 1° 30' 40"W)

     This is 1 of 199 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1335 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
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