NWA 15171 Mésosidérite #9 – 18,8 g

66,59 $

NWA 15171 is a rare mesosiderite meteorite.

Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.

Writeup from MB 112:

Northwest Africa 15171 (NWA 15171)

Adrar, Algeria

Purchased: 2022

Classification: Mesosiderite

History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.

Physical characteristics: Many brown ireggular stones without fusion crust.

Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.

Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).

Classification: Achondrite (mesosiderite)

Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.

Out of stock

Category: SKU: dt-007-1-1-2-1-1-1-1-1-1-1-1-1-1-2-1-1-1-1-1-1-1-1

Description

Complete piece.
Comes with certificate.

Additional information

Weight 18,8 g
Dimensions 5 × 3 × 0,3 cm
Form

Full

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