achondrite การใช้

• Most meteorites are stony meteorites, classed as chondrites and achondrites.
• CHUR was determined by analysing chondrite and achondrite meteorites.
• Could be an achondrite with anorthosite.
• It occurs as an interstitial mineral phase between silicate minerals in enstatite chondrite and achondrite meteorites.
• Most achondrites are also ancient rocks, and are thought to represent crustal material of differentiated planetesimals.
• All other meteorites are achondrites : volcanic rocks from planets or asteroids large enough to have a molten core.
• This time it's Russell, and the meteorite is an achondrite _ though probably not from Mars.
• It was discovered in 1982 during the chemical analysis of The North Haig olivine pigeonite achondrite ( ureilite ).
• Some scientists propose that many aubrites and enstatite achondrites are in fact impact breccias or impact-melt breccias.
• Should the onset of melting occur the meteorite would probably be classified as a primitive achondrite instead of a chondrite.
• The HED meteorites account for about 5 % of all falls, which is about 60 % of all achondrites.
• We know now that LL chondrites and achondrites are quite different, so this name is no longer in use.
• In 2006 a classification was published that assigned 7 groups to the primitive achondrites, but the classification remains controversial.
• One large family of achondrites ( the HED meteorites ) may have originated on the parent body of the Luna programs.
• Like all primitive achondrites, acapulcoites have chemical composition and mineralogical similarities with chondrites, some specimen even show relic chondrules.
• "' E-type asteroids "'are asteroids thought to have enstatite ( MgSiO 3 ) achondrite surfaces.
• The spectrum of 32 Pomona matches an S-type in the Tholen classification system, and is similar to primitive achondrite meteorites.
• The spectrum of 40 Harmonia matches an S-type in the Tholen classification system, and is similar to primitive achondrite meteorites.
• Keilite is possibly a product of reactions that take place when enstatite achondrites are melted and quenched ( a quick decrease in temperature ).
• The visible wavelength spectrum of the V-type asteroids ( including 4 Vesta itself ) is similar to the spectra of basaltic achondrite HED meteorites.