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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 ...
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 ...
3.2.3 The “Fractionated Atmospheric” Component. The nakhlites, like the shergottites, show enhanced 129 Xe/ 132 Xe ratios, but at a lower 84 Kr/ 132 Kr; that is, in the 129 Xe/ 132 Xe versus 84 Kr/ 132 Xe plot of Fig. 3.3 they plot above the mixing line between Chassigny and Mars atmosphere. This has led to the suggestion that they contain ...
Martian meteorite NWA 7034, nicknamed "Black Beauty," weighs approximately 320 g (11 oz). [2] A Martian meteorite is a rock that formed on Mars, was ejected from the planet by an impact event, and traversed interplanetary space before landing on Earth as a meteorite. As of September 2020, 277 meteorites had been classified as Martian, less than ...
- 277 as of 15 September 2020[update]
- Achondrite
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The nakhlite lavas erupted and cooled on Mars, and so they are important sources of data about Mars, including: mantle composition, surface materials, atmosphere composition, liquid water, and potential environments for life. This paper reviews our knowledge of the seven nakhlite meteorites.
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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 ).
Jul 20, 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 ...
