Northwest Africa 13790 (NWA 13790)

(Northwest Africa)

Purchased: 2020 Nov

Classification: Primitive achondrite (Winonaite)

Physical characteristics: Some fragments have fusion crust. The main mass is 131.4 g.

Petrography: (K. Metzler, IfP) Coarse-grained mafic rock, consisting of olivine (~45 vol%), low-Ca pyroxene (~10 vol%), Ca-rich pyroxene (~20 vol%), plagioclase (~10 vol%), Fe-Ni metal (~15 vol%), and small amounts of troilite. Olivine grains with reverse chemical zoning (Mg-rich reduction rims) occur. Metal occurs as isolated grains and as veins up to several cm in length. The rock shows a metamorphic texture with frequent 120° triple junctions at crystal boundaries and partly poikilitic intergrowths. Typical grain sizes vary between 100 and 500 µm. However, cm-sized areas of olivine and pyroxene, respectively, show identical optical orientation.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa3.4±0.6 (Fa2.0-4.1; n=15); Fe/Mn (at.): 15.8. The mean low-Ca pyroxene composition is Fs4.4±0.3Wo1.9±0.2 (Fs3.9-5.0Wo1.6-2.2; n=15); Fe/Mn (at.): 12.6. The mean composition of Ca-rich pyroxene is Fs1.3±0.3Wo43.8±0.6 (Fs0.9-2.2Wo42.9-45.1; n=15); Fe/Mn (at.): 10.7. The mean feldspar composition is An20.9±0.7Or3.0±0.5 (An19.9-22.1Or2.1-3.8; n=10).

Classification: Winonaite, based on the mineral chemistry and the high abundance and shape of Fe-Ni metal.

Northwest Africa 13790 (NWA 13790)

(Northwest Africa)

Purchased: 2020 Nov

Classification: Primitive achondrite (Winonaite)

Physical characteristics: Some fragments have fusion crust. The main mass is 131.4 g.

Petrography: (K. Metzler, IfP) Coarse-grained mafic rock, consisting of olivine (~45 vol%), low-Ca pyroxene (~10 vol%), Ca-rich pyroxene (~20 vol%), plagioclase (~10 vol%), Fe-Ni metal (~15 vol%), and small amounts of troilite. Olivine grains with reverse chemical zoning (Mg-rich reduction rims) occur. Metal occurs as isolated grains and as veins up to several cm in length. The rock shows a metamorphic texture with frequent 120° triple junctions at crystal boundaries and partly poikilitic intergrowths. Typical grain sizes vary between 100 and 500 µm. However, cm-sized areas of olivine and pyroxene, respectively, show identical optical orientation.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa3.4±0.6 (Fa2.0-4.1; n=15); Fe/Mn (at.): 15.8. The mean low-Ca pyroxene composition is Fs4.4±0.3Wo1.9±0.2 (Fs3.9-5.0Wo1.6-2.2; n=15); Fe/Mn (at.): 12.6. The mean composition of Ca-rich pyroxene is Fs1.3±0.3Wo43.8±0.6 (Fs0.9-2.2Wo42.9-45.1; n=15); Fe/Mn (at.): 10.7. The mean feldspar composition is An20.9±0.7Or3.0±0.5 (An19.9-22.1Or2.1-3.8; n=10).

Classification: Winonaite, based on the mineral chemistry and the high abundance and shape of Fe-Ni metal.

Antal föremål
1
Mineralform/ Meteorittyp
Skiva av primitiv akondrit Winonaite-meteorit parad med NWA 13790
Tillägg
2181
Vikt
8,03 g
Ursprungsland
Mauretanien

449 recensioner (115 de sidste 12 måneder)
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bonita rebanada lunar...entrega rápida ,muy bien protegida con estuche y tal como se muestra en fotografías....muchísimas gracias saludos 🤗

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user-8133e36456f9
Säljarens svar

Merci beaucoup pour votre achat et votre jolie message.

3ème achat chez Art & Meteorites, toujours aussi satisfait.

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user-0853e36a0d2e

Agréable surprise de découvrir un échantillon livré dans une robuste boîte de présentation. Merci beaucoup !

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user-0853e36a0d2e
Säljarens svar

Ça me fait plaisir. Félicitations.

L'échantillon est livré dans une robuste boîte de présentation. Merci beaucoup !

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user-0853e36a0d2e

Nice quality meteorites exactly as described! Secure and fast shipping. Seller highly recommended!

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user-2f2c9ee
Säljarens svar

Thank you so much!

Fast shipping, item as described , lovely gift box and display, Thank you my friend. Recommended Seller .

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user-3d4c6d903dc9
Säljarens svar

Thank you so much for the kind words.

Ik ben er zeer blij mee 👍ook dat het netje is ingepakt in een mooi doosje 👍👍

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Joanmeteoriet

Fast shipping as always and item as described, thank you my friend, pleasure to do business with you again.

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user-3d4c6d903dc9
Säljarens svar

Me too, happy to hear that you are welcome anytime my friend!

Fast shipping beautiful clean meteorites as always, happy with my purchase , thank you my friend.

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user-3d4c6d903dc9
Säljarens svar

You are welcome anytime 🙏

Fast shipping , nice cleaned meteorites, item as described thank you.

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user-3d4c6d903dc9
Säljarens svar

Thank you for your purchase, you are welcome anytime.

Bedank voor het mooie stukje meteoriet 👍mooi verpakt ik ben er blij mee .

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Joanmeteoriet

El pedido venía muy bien envuelto, y me a gustado mucho !!!

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user-835bcff
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449 recensioner (115 de sidste 12 måneder)
  1. 114
  2. 1
  3. 0

bonita rebanada lunar...entrega rápida ,muy bien protegida con estuche y tal como se muestra en fotografías....muchísimas gracias saludos 🤗

Se översättning
user-8133e36456f9
Säljarens svar

Merci beaucoup pour votre achat et votre jolie message.

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