Description: Northwest Africa 15341(NWA 15341) Co3 Anomalous (Co3-An)Carbonaceous meteorite Found in January 2022 In Mali 40 grams This is only 1 of 4 meteorites ever to be classified as CO3-anThis unique and extremely rare meteorite. SCIENTIFICALLY VALUABLE METEORITE Classified and studied by world renowned and profoundly respected Dr Anthony J. Irving and team at Department of Earth and Space sciences, University of Washington. GUARANTEED AUTHENTICITY The authenticity of this meteorite is100% guaranteed with a signed certificate For peace of mind rest assured you are buying from the main mass holder. Free first class express delivery and tracing provided. I SHIP WORLDWIDE WITH DHL, UPS OR SIMILAR EXPRESS SERVICE, TRACKED & TRACED 30 DAYS RETURNS ACCEPTED NO QUESTIONS ASKEDOFFICIAL CLASSIFICATION DATA SOURCE: THE METEORITICAL SOCIETY INTERNATIONAL SOCIETY FOR METEORITICS AND PLANETARY SCIENCE LUNAR AND PLANETARY INSTITUTE METEORITICAL BULLETIN DATABASE Northwest Africa 15341Basic informationName: Northwest Africa 15341 This is an OFFICIAL meteorite name. Abbreviation: NWA 15341 Observed fall: No Year found: 2022 Country: Mali Mass: 1210 g Classification history:Recommended: CO3-an This is 1 of 4 approved meteorites classified as CO3-an. Comments:Approved 4 Apr 2024WriteupWriteup from MB 113: Northwest Africa 15341 (NWA 15341)MaliPurchased: 2022 JanClassification: Carbonaceous chondrite (CO3-an)History: Found in Mali and purchased by Mbark Arjdal in January 2022 from a Malian dealer.Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed, relatively small chondrules (apparent diameter 230±170 µm, N = 26) containing glass or devitrified glass, plus some mineral fragments, AOA and very fine grained amoeboid CAI, are set in a fine grained matrix (~30 vol.%, red-brown in thin section) containing chromite, taenite, troilite and Cr-magnetite (associated with taenite and troilite). No kamacite was found.Geochemistry: Olivine (Fa23.1±20.4, range Fa0.7-56.1, N = 14; Cr2O3 in ferroan olivine 0.05-0.28 wt.%, mean 0.13 wt.%, sd 0.08 wt.%, N = 8), low-Ca pyroxene (Fs5.3±3.0Wo1.6±1.5, range Fs1.2-8.0Wo0.3-3.8, N = 4), diopside (Fs1.6±0.3Wo44.1±6.0, range Fs1.3-1.8Wo39.8-48.3, N = 2), Al-Ti-diopside in CAI (Fs1.7Wo50.2; Fs0.9Wo54.4; Al2O3 5.6-10.9 wt.%, TiO2 0.2-1.4 wt.%; N = 2), magnetite (Cr2O3 1.8-13.1 wt.%, N = 11).Classification: Carbonaceous chondrite (CO3, anomalous). Although magnetite is present in some low subtype CO3 chondrites. ( Rubin and Li, 2019), it is relatively Cr-poor (containing < 1 wt.% Cr2O3). The occurrence of relatively Cr-rich magnetite (containing up to 13 wt.% Cr2O3) as found in this specimen has not been previously reported in CO3 chondrites.Specimens: 27.0 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.Bibliography:Rubin A. E. and Li Y. (2019) Formation and destruction of magnetite in CO3 chondrites and other chondrite groups. Geochemistry 79, 125528. (Link)Data from: MB113 Table 0 Line 0:Place of purchase:MaliDate:P 2022 JanMass (g):1210Pieces:manyClass:CO3-anShock stage:S2Weathering grade:lowFayalite (mol%):23.1±20.4Ferrosilite (mol%):5.3±3.0Wollastonite (mol%):1.6±1.5Classifier:A. Irving, UWS, and J. Boesenberg, BrownUType spec mass (g):27.0Type spec location:UWBMain mass:M. ArjdalComments:Work name Arj ZM 822; submitted by A. IrvingInstitutions and collections UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024) Catalogs:References:Published in Meteoritical Bulletin, no. 113, in preparation (2024) Photos:CreditPhotosPublic domain photographs:A.Irving CO3-an means:"A carbonaceous chondrite of the CO group that is petrologic type 3, but which has anomalous properties."The highlighted words are defined as follows:carbonaceous chondrite: A major class of chondrites that mostly have Mg/Si ratios near the solar value and oxygen isotope compositions that plot below the terrestrial fractionation line.CO group: The Ornans (CO) chemical group of carbonaceous chondrites, distinguished by small chondrules and refractory inclusions (<0.2 mm) occupying about half the volume of the rock, and generally showing a low degree of aqueous alteration.type 3: Designates chondrites that are characterized by abundant chondrules, low degrees of aqueous alteration, and unequilibrated mineral assemblages. Many of the low-Ca pyroxene grains are monoclinic and exhibit polysynthetic twinning. The type 3 chondrites may be divided into subtypes ranging from 3.00 (least metamorphosed) to 3.9 (nearly metamorphosed to type 4 levels). If primary igneous glass occurs in the chondrules, it belongs to type 3.
Price: 995 USD
Location: Newtownabbey
End Time: 2025-01-20T02:22:57.000Z
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Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Country/Region of Manufacture: Mali
