Amgala 001，火星陨石（舍尔戈石陨石） 火星陨石（舍格蒂石）- 全切片 - 高度: 4 cm - 闊度: 2 cm - 2.2 g - (1)
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Amgala 001，來自西撒哈拉 Saguia el Hamra 地區的火星隕石（Shergottite）完整薄片，重量2.2克，尺寸4 cm × 2 cm × 0.2 cm。
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完整切片。重量 2.2 克
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Amgala 001 26.014°N, 11.020°W
Saguia el Hamra, Western Sahara
Purchased: 2022 Dec
Classification: Martian meteorite (Shergottite)
History: Multiple stones were found together in December 2022 near Meharrize. Said Muftah Bachir and Ziyao Wang bought 12 kg together from the finders, including the largest 5200 g individual; Mark Lyon acquired 19165 g from two different dealers; Aziz Habibi obtained 3500 g from another dealer.
Physical characteristics: Weathered exterior surfaces of the stones are brown with a distinctive knobby appearance. Fresh interiors are greenish-gray with darker olivine phenocrysts visible.
Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) Zoned olivine phenocrysts (up to 2 mm in length) are set in a groundmass with variable grainsize composed predominantly of prismatic, zoned clinopyroxene and lath-like maskelynite, together with accessory alkali feldspar, pyrrhotite, ulvöspinel, chromite (with variable Ti content), ilmenite, baddeleyite and chlorapatite. Thin opaque shock veins crosscut the specimen as well as secondary calcite veinlets. Olivine phenocrysts contain small patches of alteration products (red-brown in thin section).
Geochemistry: Olivine (Fa31.7-56.6, FeO/MnO = 52-55, N = 5), pigeonite (Fs27.7-48.4Wo10.4-9.8, FeO/MnO = 29-35, N = 3), subcalcic augite (Fs20.7-30.4Wo32.5-34.6, FeO/MnO = 28-32, N = 2), maskelynite (An47.4-50.5Or2.2-1.7, N = 2), alkali feldspar (Ab49.4Or34.0An16.7).
Classification: Shergottite (olivine-phyric).
Specimens: 68.3 g including one polished thin section at UWB; remainder with Mr. S. Bachir/WangZ (12 kg), Mr. M. Lyon (19165 g) and Mr. A. Habibi (3500 g).
Data from: MB112
Table 0 Line 0:
State/Prov/County: Saguia el Hamra
Place of purchase: Algeria and Morocco
Date: P 2022 Dec
Latitude: 26.014°N
Longitude: 11.020°W
Mass (g): 34665
Pieces: many
Class: Martian (shergottite)
Shock stage: high
Weathering grade: low
Fayalite (mol%): 31.7-56.6
Ferrosilite (mol%): 27.7-48.4; 20.7-30.4
Wollastonite (mol%): 8.0-10.4; 32.5-34.6
Classifier: (A. Irving, UWS, and P. Carpenter, WUSL)
Type spec mass (g): 68.3
Type spec location: UWB
Main mass: M. Lyon/S. Bachir and WangZ/A. Habibi
完整切片。重量 2.2 克
>>>>>>>>>>>>>>>>>>>>>>>>
Amgala 001 26.014°N, 11.020°W
Saguia el Hamra, Western Sahara
Purchased: 2022 Dec
Classification: Martian meteorite (Shergottite)
History: Multiple stones were found together in December 2022 near Meharrize. Said Muftah Bachir and Ziyao Wang bought 12 kg together from the finders, including the largest 5200 g individual; Mark Lyon acquired 19165 g from two different dealers; Aziz Habibi obtained 3500 g from another dealer.
Physical characteristics: Weathered exterior surfaces of the stones are brown with a distinctive knobby appearance. Fresh interiors are greenish-gray with darker olivine phenocrysts visible.
Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) Zoned olivine phenocrysts (up to 2 mm in length) are set in a groundmass with variable grainsize composed predominantly of prismatic, zoned clinopyroxene and lath-like maskelynite, together with accessory alkali feldspar, pyrrhotite, ulvöspinel, chromite (with variable Ti content), ilmenite, baddeleyite and chlorapatite. Thin opaque shock veins crosscut the specimen as well as secondary calcite veinlets. Olivine phenocrysts contain small patches of alteration products (red-brown in thin section).
Geochemistry: Olivine (Fa31.7-56.6, FeO/MnO = 52-55, N = 5), pigeonite (Fs27.7-48.4Wo10.4-9.8, FeO/MnO = 29-35, N = 3), subcalcic augite (Fs20.7-30.4Wo32.5-34.6, FeO/MnO = 28-32, N = 2), maskelynite (An47.4-50.5Or2.2-1.7, N = 2), alkali feldspar (Ab49.4Or34.0An16.7).
Classification: Shergottite (olivine-phyric).
Specimens: 68.3 g including one polished thin section at UWB; remainder with Mr. S. Bachir/WangZ (12 kg), Mr. M. Lyon (19165 g) and Mr. A. Habibi (3500 g).
Data from: MB112
Table 0 Line 0:
State/Prov/County: Saguia el Hamra
Place of purchase: Algeria and Morocco
Date: P 2022 Dec
Latitude: 26.014°N
Longitude: 11.020°W
Mass (g): 34665
Pieces: many
Class: Martian (shergottite)
Shock stage: high
Weathering grade: low
Fayalite (mol%): 31.7-56.6
Ferrosilite (mol%): 27.7-48.4; 20.7-30.4
Wollastonite (mol%): 8.0-10.4; 32.5-34.6
Classifier: (A. Irving, UWS, and P. Carpenter, WUSL)
Type spec mass (g): 68.3
Type spec location: UWB
Main mass: M. Lyon/S. Bachir and WangZ/A. Habibi
詳細資料
物品數量
1
隕石名稱
Amgala 001, Meteorite Martian (shergottite)
隕石種類
Meteorite Martian (shergottite) - full slice
重量
2,2 g
原產國
Western Sahara
Height
4 cm
Width
2 cm
Depth
0,2 cm
