编号 81966443

已售出
Sebkha el Melah 001 顽火辉石无球粒陨石(奥氏辉石) 无球粒陨石 - 5 g - (1)
最终出价
€ 110
10周前

Sebkha el Melah 001 顽火辉石无球粒陨石(奥氏辉石) 无球粒陨石 - 5 g - (1)

Physical characteristics: This meteorite consists primarily of clusters of coarse, interlocking enstatite crystals with a pegmatitic texture. Individual crystals are cm-sized, many showing distinct cleavage planes and traces. Some enstatite crystals are milky-white in color, while a few are colorless translucent to transparent and gemmy. The enstatite crystals separate from the clusters easily, and the largest single crystal weighed 45 grams and was approximately 5 cm long and 2 cm wide. There are also scattered dark-colored patches on some of the crystals. Significant amounts of smooth cream-colored to white fusion crust are visible, although some fusion crust is dark-colored. No vesicles are present. The meteorite appears to be unbrecciated. Petrography: (A. Ross and C. Agee, UNM) Electron microprobe analyses and reflected light microscopy show that enstatite makes up approximately 98% of this meteorite. Scattered small diopside grains were detected. A single olivine grain was found in the sample microprobe mount. Small grains of kamacite, taenite, schreibersite, Ti-troilite, troilite, and daubreelite were the only accessory opaques observed. No other sulfides were detected. No feldspar was found in the microprobe mount. Geochemistry: (A. Ross, UNM) Enstatite Fs0.0±0.0Wo0.9±0.1, n=6; diopside Fs0.0±0.0Wo45.5±0.8, n=3; forsterite Fa0.0, n=1; kamacite Ni=4.3±0.8, Co=0.4±0.2 (wt%); taenite Ni=48.7, Co=0.11 (wt%). Classification: Aubrite, non-brecciated (after Keil, 1989). This aubrite has one of the highest modal abundances of enstatite ever reported (~98%). The enstatite, diopside, and forsterite of this meteorite have some of lowest iron contents (below electron microprobe major element detection limits) ever documented in an aubrite.

编号 81966443

已售出
Sebkha el Melah 001 顽火辉石无球粒陨石(奥氏辉石) 无球粒陨石 - 5 g - (1)

Sebkha el Melah 001 顽火辉石无球粒陨石(奥氏辉石) 无球粒陨石 - 5 g - (1)

Physical characteristics: This meteorite consists primarily of clusters of coarse, interlocking enstatite crystals with a pegmatitic texture. Individual crystals are cm-sized, many showing distinct cleavage planes and traces. Some enstatite crystals are milky-white in color, while a few are colorless translucent to transparent and gemmy. The enstatite crystals separate from the clusters easily, and the largest single crystal weighed 45 grams and was approximately 5 cm long and 2 cm wide. There are also scattered dark-colored patches on some of the crystals. Significant amounts of smooth cream-colored to white fusion crust are visible, although some fusion crust is dark-colored. No vesicles are present. The meteorite appears to be unbrecciated.

Petrography: (A. Ross and C. Agee, UNM) Electron microprobe analyses and reflected light microscopy show that enstatite makes up approximately 98% of this meteorite. Scattered small diopside grains were detected. A single olivine grain was found in the sample microprobe mount. Small grains of kamacite, taenite, schreibersite, Ti-troilite, troilite, and daubreelite were the only accessory opaques observed. No other sulfides were detected. No feldspar was found in the microprobe mount.

Geochemistry: (A. Ross, UNM) Enstatite Fs0.0±0.0Wo0.9±0.1, n=6; diopside Fs0.0±0.0Wo45.5±0.8, n=3; forsterite Fa0.0, n=1; kamacite Ni=4.3±0.8, Co=0.4±0.2 (wt%); taenite Ni=48.7, Co=0.11 (wt%).

Classification: Aubrite, non-brecciated (after Keil, 1989). This aubrite has one of the highest modal abundances of enstatite ever reported (~98%). The enstatite, diopside, and forsterite of this meteorite have some of lowest iron contents (below electron microprobe major element detection limits) ever documented in an aubrite.

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