13017- Top Rare New "NWA 14740" Carbonaceous Chondrite C3 Ungrouped Meteorite 7.3g
13017- Top Rare New "NWA 14740" Carbonaceous Chondrite C3 Ungrouped Meteorite 7.3g 13017- Top Rare New "NWA 14740" Carbonaceous Chondrite C3 Ungrouped Meteorite 7.3g 13017- Top Rare New "NWA 14740" Carbonaceous Chondrite C3 Ungrouped Meteorite 7.3g 13017- Top Rare New "NWA 14740" Carbonaceous Chondrite C3 Ungrouped Meteorite 7.3g

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13017- Top Rare New "NWA 14740" Carbonaceous Chondrite C3 Ungrouped Meteorite 7.3g

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Species
Carbonaceous Chondrite C3 Ungrouped. Belonging to the new "CT" chondrite group proposed in the recent LPSC (Lunar and Planetary Science Conference (2022)) abstract.
Age
-
Location
Algeria, North West Africa
Formation
Origin of Solar System
Size
33 mm   •    in
Weight
7 g   •    oz
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Description

Meteorite type & CLASS / OFFICIAL NAME or NUMBER (Meteoritical Bulletin Database): ''NWA 14740'' Carbonaceous Chondrite C3 Ungrouped. Belonging to the new "CT" chondrite group proposed in the recent LPSC (Lunar and Planetary Science Conference (2022)) abstract.

FALL/FIND LOCATION: Algeria, North West Africa

WEIGHT: 7.3 g

Ref: 13017

Meteoritical Bulletin Database NWA 14740

Observations: Northwest Africa 14740 (NWA 14740)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (C3, ungrouped)

History: Purchased jointly by Juan Poblador and Roger Jones in 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL; L. Garvie, ASU) Relatively small, well-formed chondrules (apparent diameter 310±280 µm, N = 26) accompanied by zoned mineral grains, AOA and rare very small, amoeboid, very fine grained CAI are set in a black ultra fine-grained matrix (~60 vol.%). Accessory phases detected by electron microprobe analysis include troilite, pentlandite, kamacite (as inclusions in chondrule olivine only) and calcite. No phyllosilicates were detected by powder X-ray diffraction analysis.

Geochemistry: Olivine (Fa23.1±23.8, range Fa0.9-58.1, N = 8), low-Ca pyroxene (Fs1.1±0.5Wo2.8±2.6, range Fs0.7-1.4Wo0.9-4.6, N = 2), subcalcic augite (Fs0.8Wo30.3). Oxygen isotopes (C. Sonzogni, J. Gattacceca, CEREGE): analysis of a 1.5 mm powdered sample by laser fluorination gave δ17O 1.41, δ18O 8.68, Δ17O -3.16 (for a TFL slope of 0.526), all per mil.

The authenticity of this specimen is guaranteed by the Geologist J.A.Poblador, member of the Global Meteorite Association G0043 and IMCA 5681, and also one of the official main mass holders of this material.

CT CHONDRITES: A NEWLY RECOGNIZED CARBONACEOUS CHONDRITE GROUP WITH
MULTIPLE MEMBERS, INCLUDING TELAKOAST 001, CHWICHIYA 002 AND CIMARRON. (53rd Lunar and Planetary Science Conference (2022)

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