0.025g Carbonaceous Chondrite Meteorite CI 1 I Oued Chebeika 002
On Offer: CI1 - 0.025g Oued Chebeika 002 carbonaceous chondrite meteorite fragment
Official Name: Oued Chebeika 002
Type: CI1 Carbonaceous Chondrite
Observed fall: No
Description: This 0.025 gram CI1 specimen of the Oued Chebeika 002 carbonaceous chondrite meteorite is an example of one of the rarest and most sought after carbonaceous chondrite sub-classes in existence.
Often referred to as the "holy grail" of meteorites, the CI1 has a petrologic grade of "1", hence the 1 in the CI1 sub class name. This designation, unlike the partially altered CM2 chondrites, indicates that the CI1 carbonaceous chondrites have been almost entirely altered by indigenous water while still on its parent asteroid.
The CI1 chondrites are physical proof that at least some of the C-type asteroids within our solar system have or have had liquid water in them, and that this water has altered the silicates of the CI1 into hydrous phyllosilicates as well as the kamacite into magnetite framboids. These types of hydrous alterations are well established indicators that the material in the chondrite has been exposed to liquid water while in situ within its parent asteroid.
BSE Images taken during analysis and confirmation at the University of
Colorado Boulder's EPMA lab of the group of CI1 fragments that this
CI1 fragment comes from.
Taking a break to say hi while working on the analysis and classification of
meteorites in the microprobe (EPMA) lab at the University of Colorado Boulder.
History: The fragments were found close to the village of Abteh, Morocco, on June 6, 2024.
What you get: 0.025g Oued Chebeika 002 Carbonaceous Chondrite Meteorite Specimen as shown, Storage/Display Box, & signed Certificate of Authenticity.
I offer a 100% no questions asked 30 day return policy.
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| Basic information |
Name: Oued Chebeika 002 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2024 Country: Morocco Mass:  418 g |
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| Classification history: |
This is 1 of 10 approved meteorites classified as CI1. |
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| Comments: | Approved 22 Oct 2024 Revised 2 Dec 2024: Updated mass and text |
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| Writeup |
Writeup from MB 113:
Oued Chebeika 002 28°5’34.45"N, 11°32’10.34"W South, Morocco Find: 2024 Jun 20 Classification: Carbonaceous chondrite (CI1) History: The fragments were found close to the village of Abteh, Morocco, on June 6, 2024. Six fragments, including a 33.9 g stone and crusted fragments were bought by Jean Redelsperger from Mohamed Elguirah later in 2024. Luc Labenne acquired the main mass (a 136.4 g crusted stone, and 35.76 g of fragments detached from this stone). In November 2024, Mark Lyon acquired 120 g of material, and Ziyao Wang acquired 47.7 g of material, both in the form of mm-sized fragments. Jeremy Bassemon later acquired 5 g in the form of mm-sized fragments. In December 2024, Jean Redelsperger acquired 9 additionnal fragments totalling 28.5 g. Physical characteristics: Black, friable irregular stones. Whitish grains up to mm size are visible at the surface. Some fragments display fusion crust. Broken surfaces show a black interior with visible iron sulfide grains. Petrography: (J. Gattacceca, B. Devouard, CEREGE) Observation of a polished section show a groundmass of fine-grained phyllosilicates with abundant magnetite and iron sulfides. Chondrules or their pseudomorphs were not observed. Magnetite is present as framboids and plaquettes. Pyrrhotite is present as euhedral grains to 30 µm. Other minerals: carbonates (ferriferous dolomite) to 50 µm, Ca-phosphates. The meteorite contains clasts to 200 µm that are distinguished from the groundmass by variable opaque mineral content. X-ray diffraction of a powdered 10 mg sample (D. Borschneck, CEREGE) confirms the mineralogy determined by optical and backscattered electron observations, with the presence of the following minerals: clay minerals, magnetite, pyrrhotite, and minor pentlandite, dolomite, and apatite. X-ray diffraction of the clay fraction indicates smectite and serpentine. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.83, measured on a 32 g stone, is in the upper range of other CI chondrites, most similar to that of Orgueil that has log χ = 4.78±0.05 (n=9) Rochette et al., 2008, and close to the value measured for Ryugu material (Maurel et al., 2024). This magnetic susceptibility value indicates a magnetite content of about 10 wt%. Geochemistry: Oxygen isotopic composition (D. Au Yang, J. Gattacceca, CEREGE) from analysis of a 3.40 mg bulk sample is δ17O=8.81‰, δ18O=15.34‰, Δ17O=0.83‰ (slope 0.52, analytical uncertainties 0.115‰, 0.062‰, 0.005‰ respectively). Defocused electron microprobe analyses of the matrix: analytical totals 81.8±4.9 wt%, SiO2 34.0±2.5 wt%, MgO 22.0±1.6 wt%, FeO 16.0±1.2 wt%, Al2O3 2.35±0.33, Na2O 1.03±0.24, NiO 1.74±0.50, S 3.81±1.55 (n=3). Classification: Carbonaceous chondrite (CI1). The CI group is supported by the mineralogy and oxygen isotopic composition. Type 1 designation supported by the absence of anhydrous silicates. Specimens: Type specimen at CEREGE (22.7 g). The polished sections in CEREGE were prepared following Wilson et al. (2024). 5 g at ASU, 6 g a polished thin section and a polished mount at UWB (with work names LAB24-2 and LABMET24JUL24), 4 g in UNM. Material with Jean Redelsperger, Luc Labenne, Mark Lyon, Ziyao Wang, and Jeremy Bassemon.
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| Bibliography: |
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| Data from: MB113 Table 0 Line 0: |
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| Plots: | O isotopes: |
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