Description
153g main mass. Sold with label/certificate of authenticity.
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Northwest Africa 13499 (NWA 13499)
Algeria
Purchased: 2020 Jan
Classification: HED achondrite (Eucrite)
Petrography: (J. Gattacceca, CEREGE) Igneous rock with subopthitic texture. Main minerals are pyroxene (exsolved) and plagioclase with typical grain size 600 µm. Other minerals: metal, troilite, chromite, ilmenite. Vesicles up to 200 µm are present.
Geochemistry: Low-Ca pyroxene Fs42.9±0.9Wo3.7±0.9 (n=7), Ca-pyroxene Fs25.0Wo35.5 (n=2), Fs16.5Wo44.9 (n=2), FeO/MnO = 27.8±2.0 (n=11). Plagioclase An92.2±0.5Ab7.5±0.4Or0.4±0.0 (n=4).
Classification: Achondrite (eucrite).
Place of purchase:GuelmimDate:P 2020 JanMass (g):177.7Pieces:1Class:EucriteWeathering grade:lowMagnetic suscept.:2.45Classifier:J. Gattacceca, CEREGEType spec mass (g):21.2Type spec location:CEREGEMain mass:Pierre-Marie PeléComments:work name PM20AC1; submitted by Jérôme Gattacceca
