Ib achondrite yog ib lub pob zeb meteorite uas tsis muaj chondrules. Nws muaj cov khoom siv zoo ib yam li cov pob zeb hauv av los yog plutonic pob zeb thiab tau sib txawv thiab rov ua dua kom tsawg dua lossis ntau dua vim yog melting thiab recrystallization ntawm lossis hauv meteorite niam txiv lub cev.
Achondrites tsawg tsawg?
Achondites are rare. Tsuas yog ob peb % ntawm tag nrho cov meteorites yog achondrites. Lawv tsis tshua muaj vim lawv yuav tsum tau tawg tawm ntawm lub ntiaj teb lub cev thaum muaj kev cuam tshuam uas lawv yuav tsum ncav cuag kev khiav tawm, txwv tsis pub lawv tsuas yog poob rov qab rau lub ntiaj teb lub cev uas lawv sim khiav tawm thawj qhov chaw.
Achondrites feem ntau tuaj qhov twg?
Achondrites suav txog li 8% ntawm cov meteorites tag nrho, thiab feem ntau (kwv yees li ob feem peb) ntawm lawv yog HED meteorites, tejzaum nws pib los ntawm lub pob zeb ntawm asteroid 4 Vesta. Lwm hom muaj xws li Martian, Lunar, thiab ob peb hom xav tias yog los ntawm qhov tseem tsis tau paub txog lub hnub qub.
Qhov txawv ntawm chondrites thiab achondrites yog dab tsi?
Chondrites tuaj yeem sib txawv ntawm hlau meteorites vim lawv cov hlau tsis tshua muaj thiab cov ntsiab lus nickel. Lwm cov meteorites uas tsis yog xim hlau, achondrites, uas tsis muaj chondrules, tau tsim tsis ntev los no. Tam sim no muaj ntau tshaj 27,000 chondrites nyob rau hauv lub ntiaj teb no collections.
Achondrites muaj dab tsi?
VII.
Enstatite achondrites muaj feem ntau ntawm FeO-dawb enstatite, thiab tseem muaj cov plagioclase me, diopside, thiab forsterite (FeO-dawb olivine) nrog rau cov hlau, phosphides, silicide, thiab medley ntawm sulfide minerals.
