Rumuruti chondrite R3的切片 NWA 13060 - 4 g - (1)

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由Francesco Moser精選

Northwest Africa 13060 (NWA 13060) (Northwest Africa) Purchased: 2019 Classification: Rumuruti chondrite (R3) History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Brownish rock with some fusion crust. Petrography: The meteorite displays a light brownish to orange interior and is composed of sparse up to 1 mm sized angular type 3 clasts and matrix. Olivine and low-Ca pyroxene are compositionally unequilibrated in clasts and matrix; Fe-rich olivine is the most dominant mineral phase in the matrix. Chondrules have an average diameter of about 400 μm. More minor phases include low-Ca pyroxene, rare Ca-pyroxene, sodic plagioclase, sulfides, and Ti-bearing chromite; no metal has been detected. Geochemistry: Olivine: Fa24.9±16.7 (Fa2.6-47.7, n=27); low-Ca pyroxene: Fs16.7±10.6Wo0.7±0.6 (Fs4.4-34.8Wo0.2-2.5, n=23)

編號 99642439

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Rumuruti chondrite R3的切片 NWA 13060 - 4 g - (1)

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Northwest Africa 13060 (NWA 13060)

(Northwest Africa)

Purchased: 2019

Classification: Rumuruti chondrite (R3)

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Brownish rock with some fusion crust.

Petrography: The meteorite displays a light brownish to orange interior and is composed of sparse up to 1 mm sized angular type 3 clasts and matrix. Olivine and low-Ca pyroxene are compositionally unequilibrated in clasts and matrix; Fe-rich olivine is the most dominant mineral phase in the matrix. Chondrules have an average diameter of about 400 μm. More minor phases include low-Ca pyroxene, rare Ca-pyroxene, sodic plagioclase, sulfides, and Ti-bearing chromite; no metal has been detected.

Geochemistry: Olivine: Fa24.9±16.7 (Fa2.6-47.7, n=27); low-Ca pyroxene: Fs16.7±10.6Wo0.7±0.6 (Fs4.4-34.8Wo0.2-2.5, n=23)