Achondrites magmatic

Magmatic achondrites - crystallized from silicate magma Aubrites... 

Distinguish between the origins of magmatic achondrites, primitive achondrites, and irons. 

The Apollo 11 rocks contain large amounts of ilmenite, as can be seen from Tables 2 and 3 (high titanium content). We have plotted the chemical composition of rock sample 12018 in Fig. 3a vs. that of the carbonaceous chondrites (the most primitive of all meteorites), in Fig. 3b vs. the basaltic achondrite (eucrite) Juvinas (a class of meteorites which have undergone magmatic differentiation) and in Fig. 4 vs. the average composition of the Earth s... 

Differentiated achondrites represent the products of classical igneous processes acting on the silicate-oxide system of asteroidal bodies— partial to complete melting, and magmatic crystallization. Iron meteorites represent the complementary metal-sulfide system products of this process. 

The differentiated nonchondrites in Table 18.1 consist primarily of achondrites which are stony meteorites that lack chondrules and contain evidence of magmatic differentiation, including the segregation of liquid iron and nickel which are insoluble in silicate... 

Eucrites are achondritic stony meteorites that originate from the surface of the asteroid 4 Vesta. Die meteorite Serra de Mag6, an eucrite, contains quartz veinlets. They are identical to crack-seaT quartz veinlets in terrestrial rocks, and are extraterrestrial and ancient because they pre-date a 4.40 Ga metamorphism. The quartz was likely deposited from liquid water solutions (as are terrestrial veins). Because there is no indication of internal (magmatic) water in the eucrite meteorites and thus in Vesta, the water from which the veinlet was deposited probably came from outside Vesta. By analogy with water ice deposits on the Moon and Mercury, Vesta and similar asteroids may have had (or now have) polar ice deposits, possibly remainders from comet impacts (Treiman et al., 2004 [339]). 

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