NWA 13571 - ユークライト溶融ブレセア、全切片 - Height: 4 cm - Width: 2 cm - 4.5 g - (1)
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Northwest Africa 13571 (NWA 13571) is an eucrite melt breccia meteorite in a full slice from Saguia el Hamra, Western Sahara, with a 2.0 cm width, 4.0 cm height and a weight of 4.5 g.
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Description from the seller
Thin full slice. Weight 4.5 grams
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Northwest Africa 13571 (NWA 13571)
Morocco
Purchased: 2013
Classification: HED achondrite (Eucrite, melt breccia)
History: Sergey Vasiliev and Marc Jost (SJS) purchased the 61.1 g specimen from a Mohammed Sbai in Ouzarzazate, Morocco, in April 2013.
Physical characteristics: Sample is an ovoid-shaped fragment. The exterior is partially coated with a greenish-orange rind that may be where the impact melt vein is exposed on the surface. The cut face of the sample shows a dark interior with an impact melt brecciated structure.
Petrography: Sample shows breccia in breccia structure composed of angular to rounded clasts set within an opaque melt matrix. Clasts have brecciated textures composed of basaltic textured clasts set within a comminuted matrix crosscut by 2 mm thick opaque impact melt veins. Lithic fragments have subophitic textures with exsolved pyroxenes. Additional minerals are Si polymorph, chromite, ilmenite and apatite.
Geochemistry: (A. Love, App) low-Ca pyroxene, Fs61.5±0.6Wo2.7±0.8 (Mg#36.7±0.4, Fe/Mn=30.0±1.1, n=25); pigeonite, Fs55.9±4.1Wo11.0±3.4 (Fe/Mn=30.2±0.3, n=2); high-Ca pyroxene, Fs27.7±3.5Wo42.3±4.1 (Fe/Mn=30.2±0.8, n=17); plagioclase, An88.8±2.2Or0.4±0.2 (n=24).
Classification: HED achondrite (eucrite impact melt breccia). Based on textures and mineral compositions, sample is a basaltic eucrite impact melt breccia.
Specimens: Sergey Vasiliev and Marc Jost (SJS) hold the main mass. A type sample of composed of a slice and end cut weighing 12.23 g and a polished thin section are on deposit at App.
Place of purchase: Ouzarzazate, Morocco
Date: P 2013
Mass (g): 61.1
Pieces: 1
Class: Eucrite-melt breccia
Shock stage: M-S5
Weathering grade: low
Ferrosilite (mol%): 61.5±0.6; 55.9±4.1; 27.7±3.5
Wollastonite (mol%): 2.7±0.8; 11.0±3.4; 42.3±4.1
Magnetic suscept.: 2.77
Classifier: A. Love, App
Type spec mass (g): 12.23
Type spec location: App
Main mass: Sergey Vasiliev and Marc Jost (SJS)
Thin full slice. Weight 4.5 grams
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Northwest Africa 13571 (NWA 13571)
Morocco
Purchased: 2013
Classification: HED achondrite (Eucrite, melt breccia)
History: Sergey Vasiliev and Marc Jost (SJS) purchased the 61.1 g specimen from a Mohammed Sbai in Ouzarzazate, Morocco, in April 2013.
Physical characteristics: Sample is an ovoid-shaped fragment. The exterior is partially coated with a greenish-orange rind that may be where the impact melt vein is exposed on the surface. The cut face of the sample shows a dark interior with an impact melt brecciated structure.
Petrography: Sample shows breccia in breccia structure composed of angular to rounded clasts set within an opaque melt matrix. Clasts have brecciated textures composed of basaltic textured clasts set within a comminuted matrix crosscut by 2 mm thick opaque impact melt veins. Lithic fragments have subophitic textures with exsolved pyroxenes. Additional minerals are Si polymorph, chromite, ilmenite and apatite.
Geochemistry: (A. Love, App) low-Ca pyroxene, Fs61.5±0.6Wo2.7±0.8 (Mg#36.7±0.4, Fe/Mn=30.0±1.1, n=25); pigeonite, Fs55.9±4.1Wo11.0±3.4 (Fe/Mn=30.2±0.3, n=2); high-Ca pyroxene, Fs27.7±3.5Wo42.3±4.1 (Fe/Mn=30.2±0.8, n=17); plagioclase, An88.8±2.2Or0.4±0.2 (n=24).
Classification: HED achondrite (eucrite impact melt breccia). Based on textures and mineral compositions, sample is a basaltic eucrite impact melt breccia.
Specimens: Sergey Vasiliev and Marc Jost (SJS) hold the main mass. A type sample of composed of a slice and end cut weighing 12.23 g and a polished thin section are on deposit at App.
Place of purchase: Ouzarzazate, Morocco
Date: P 2013
Mass (g): 61.1
Pieces: 1
Class: Eucrite-melt breccia
Shock stage: M-S5
Weathering grade: low
Ferrosilite (mol%): 61.5±0.6; 55.9±4.1; 27.7±3.5
Wollastonite (mol%): 2.7±0.8; 11.0±3.4; 42.3±4.1
Magnetic suscept.: 2.77
Classifier: A. Love, App
Type spec mass (g): 12.23
Type spec location: App
Main mass: Sergey Vasiliev and Marc Jost (SJS)
Details
アイテム数
1
隕石の種類
NWA 13571 - Eucrite-melt breccia, full slice
重量
4.5 g
原産国
Saguia el Hamra, Western Sahara
高さ
4 cm
幅
2 cm
奥行き
0.2 cm
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