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Meteorite NWA 15581 CK5 Carbonaceous chondrite meteorite, 289 grams For Sale
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Meteorite NWA 15581 CK5 Carbonaceous chondrite meteorite, 289 grams: $2995.00
NORTHWEST AFRICA 15581(NWA 15581)CK5CARBONACEOUS METEORITEFOUND IN APRIL 2022IN MALI 🇲🇱289GRAMS GUARANTEED AUTHENTICITY YOU ARE BUYING 100% A GUARANTEED AUTHENTIC METEORITEcombined with a signed certificate of authenticityFirst express class delivery and provenance provided. I SHIP WORLDWIDE WITH FEDEX, DHL, UPS OR SIMILAR EXPRESS SERVICE, TRACKED & TRACED OFFICIAL CLASSIFICATION DATA SOURCE: THE METEORITICAL SOCIETY INTERNATIONAL SOCIETY FOR METEORITICS AND PLANETARY SCIENCE LUNAR AND PLANETARY INSTITUTE METEORITICAL BULLETIN DATABASENorthwest Africa 15581Basic informationName:Northwest Africa 15581 This is an OFFICIAL meteorite name. Abbreviation:NWA 15581 Observed fall:No Year found:2022 Country:(Northwest Africa) Mass:1577 11 Apr 2024WriteupWriteup from MB 113:
Northwest Africa 15581(NWA 15581) (Northwest Africa) Purchased: 2022 Apr Classification: Carbonaceous chondrite (CK5) History: Purchased by Mbark Arjdal in April 2022 from a Malian dealer. Petrography: (A. Irving,UWSand P. Carpenter,WUSL) Sparse well-defined, mostly porphyritic chondrules containing Cr-magnetite stained by Fe terrestrial hydroxides are set in a fine grained matrix containing stained Cr-magnetite, subcalcic augite, intermediate plagioclase and composite grains of ilmenite+Cr spinel. Minor secondary calcite, barite and Fe oxide are present. Geochemistry: Olivine (Fa30.5±0.3, range Fa30.0-30.8, N = 5), low-Ca pyroxene (Fs27.6±1.3Wo0.9±0.4, range Fs26.6-29.2Wo0.4-1.3, Al2O33.1-5.3 wt.%, N = 4), pigeonite (Fs23.8Wo9.6, Al2O33.0 wt.%), subcalcic augite (Fs14.7Wo30.9, Al2O32.2 wt.%), plagioclase (An30.3Or2.5; An50.2Or1.0; N = 2), magnetite (Cr2O33.7-3.9 wt.%, N = 3). Classification: Carbonaceous chondrite (CK5). Specimens: 22.9 g plus one polished thin section atUWB; remainder with Mr. M. Arjdal. Data from: MB113 Table 0 Line 0:Place of purchase:MaliDate:P 2022 AprMass (g):1577Pieces:15Class:CK5Shock stage:lowWeathering grade:lowFayalite (mol%):30.6±0.3Ferrosilite (mol%):27.6±1.3Wollastonite (mol%):0.9±0.4Classifier:A. Irving, UWS, and P. Carpenter, WUSLType spec mass (g):22.9Type spec location:UWBMain mass:M. ArjdalComments:Work name Arj ZM 805; submitted by A. IrvingCK5means: \"Acarbonaceous chondriteof theCK groupthat isanomalousand petrologictype 5.\" 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. CK group : TheKaroonda (CK) chemical group of carbonaceous chondrites, distinguished by abundant fine-grained matrix (~75 vol%), mm-sized chondrules that lack igneous rims, relatively few refractory inclusions, and a high degree of oxidation; most CK chondrites have been metamorphosed to type 4 or higher. anomalous: Designates meteorites that have been determined to be a member of a specific group, but have certain properties that are unusual or distinctive. type 5: Designates chondrites that have been metamorphosed under conditions sufficient to homogenize olivine and pyroxene, convert all low-Ca pyroxene to orthopyroxene, cause the growth of various secondary minerals, and blur chondrule outlines.
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