2.3g CO3.0 - Carbonaceous Chondrite Meteorite
On Offer: 2.3g CO3.0 Carbonaceous Chondrite Meteorite fragment
Type: CO3.0 Carbonaceous Chondrite
Name: NWA 12930
Description: The CO carbonaceous chondrites are considered amongst the most pristine and unaltered of the carbonaceous chondrites, likely owing to their parent body having an orbit outside of a critical heating zone. This along with the absence of aqueous alteration left these unequilibrated chondrites much as they were when they formed over 4 billion years ago. Of all of the CO chondrites, those with a petrographic designation of 3.0 are the least altered and most pristine of the CO classifications.
What you get: CO3.0 Carbonaceous Chondrite specimen as shown, and signed Certificate of Authenticity.
I offer a 100% no questions asked 30 day return policy.
SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW
|Northwest Africa 12930|
|Basic information||Name: Northwest Africa 12930
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12930
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 41 g
This is 1 of 22 approved meteorites classified as CO3.0. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
|Comments:||Approved 21 Nov 2019|
Writeup from MB 108:
Northwest Africa 12930 (NWA 12930)
Classification: Carbonaceous chondrite (CO3.0)
History: Purchased Dec. 2018 by Dustin Dickens in Morocco from anonymous dealer.
Physical characteristics: Many small, identically appearing pieces. Most pieces are fragmented with partial fresh fusion crust. Broken surfaces are very dark colored with many small chondrules. Scattered, small CAIs are visible throughout.
Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous small chondrules, opaque matrix makes up approximately 40% of this meteorite. Mean apparent chondrule diameter 150±75 μm, n=27.
Geochemistry: (C. Agee, UNM) Olivine Fa8.0±14.4, Cr2O3=0.36±0.13 (wt%), n=22; low-Ca pyroxene Fs2.3±1.2Wo3.4±0.5, n=9.
Classification: Carbonaceous chondrite (CO3.0), 3.0 based on the Cr2O3 content and 1-sigma in olivine (Grossman and Brearley, 2005).
Specimens: 8.5 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.
|UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)|
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