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Météorite HED achondrite eurite 37 g

$550.00

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Description

Description

L’eucrite est la classe la plus courante de météorites achondrites et fait partie du groupe HED dont le corps parent est supposé être l’astéroïde Vesta . Les eucrites sont des basaltes – des roches volcaniques d’origine magmatique (voir magma ) – composées principalement de pigeonite, un pyroxène pauvre en calcium , et d’anorthite, un plagioclase riche en calcium . Des différences de minéralogie et de chimie ont conduit à les organiser en trois sous-groupes.

 

On pense que les eucrites non cumulées proviennent de la croûte supérieure de Vesta, qui s’est solidifiée au-dessus d’un océan de magma après la formation du noyau et du manteau. Les rares eucrites cumulées semblent provenir de la sédimentation gravitationnelle de minéraux cristallisés, principalement du pyroxène et du plagioclase, dans des chambres magmatiques sous la croûte primitive de Vesta. Enfin, les eucrites polymictes sont des brèches qui contiennent plus de 90 % de clastes eucritiques et moins de 10 % de clastes diogènes. Ce rapport arbitraire de 9:1 est utilisé pour distinguer les eucrites polymictes des howardites étroitement apparentées , qui présentent une distribution plus uniforme de matériel eucritique et diogène.

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At our store, we specialize in selling rare meteorites and precious stones, ensuring that each item reaches you in pristine condition, no matter where you are in the world. We are proud to partner with DHL, a global leader in logistics and shipping, to provide secure and reliable delivery from Morocco to the United States and other countries worldwide.

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• Europe: 2-5 business days
• Rest of the World: 5-10 business days

Please note that delivery times may vary based on your location and customs processing times.

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