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Nakhlites are igneous rocks that are rich in augite and were formed from basaltic magma about 1.3 billion years ago. They contain augite and olivine crystals. Their crystallization ages, compared to a crater count chronology of different regions on Mars, suggest the nakhlites formed on the large volcanic construct of either Tharsis, Elysium, or ...
The nakhlite meteorite group contains the largest quantity of phyllosilicates, and for this reason, they have been characterized in more detail. The most abundant phyllosilicates present in nakhlites include poorly crystalline trioctahedral Fe-bearing saponite and serpentine (Hicks et al., 2014; Hallis et al., 2014).
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Jul 1, 2005 · The seven nakhlite meteorites are augite-rich igneous rocks that formed in flows or shallow intrusions of basaltic magma on Mars. They consist of euhedral to subhedral crystals of augite and olivine (to 1 cm long) in fine-grained mesostases. The augite crystals have homogeneous cores of Mg' = 63% and rims that are normally zoned to iron enrichment.
Nakhla is the first Martian meteorite to show signs of aqueous processes on Mars. The rock contains carbonates and hydrous minerals, formed by chemical reactions in water. Also, the rock was exposed to water after it formed, which caused secondary accumulations of minerals. The carbonates contain more carbon-13 than rocks formed on Earth ...
Jan 1, 2015 · The nakhlite subgroup contains a total of 14 samples, which are classified as clinopyroxene rich rocks. Overview The nakhlites come most likely from a single impact event, sampling the same region, since they all exhibit cosmic ray exposure ages of 10.6 ± 1 Ma (Eugster et al. 2006 ).
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Amorce Meteorite Museum. History: Purchased in December 2020 by Said Yousfi from a dealer near the Morocco-Algeria border and then acquired jointly by Mendy Ouzillou and Dustin Dickens. Physical characteristics: This somewhat friable specimen was found in several pieces (total weight 139.2 g, comprising stones of 66.1 g and 21.4 g plus other ...
It is also claimed that the nakhlite meteorites have experienced varying degrees of late-magmatic and sub-solidus diffusive re-equilibration (Harvey and McSween 1992). The olivine and augite grains in Nakhla frequently contain magmatic, “melt” inclusions (figure 4). These inclusions have mostly re-crystallized and are hard to
