Dunite yog ib qho igneous plutonic pob zeb ntawm ultramafic muaj pes tsawg leeg nrog coarse-grained granular los yog phaneritic kev ntxhib los mos thiab feem ntau loj los yog txheej.
Puas yog dunite ib lub pob zeb metamorphic?
Dunite (/ˈduːˌnaɪt, ˈdʌnˌaɪt/), tseem hu ua olivinite (tsis txhob totaub nrog cov ntxhia olivenite), yog ib pob zeb intrusive igneous pob zeb ntawm ultramafic muaj pes tsawg leegthiab nrog phaneritic (coarse-grained) texture.
Puas yog dunite ib lub pob zeb mafic?
peridotite yog qhov ntom ntom heev, graged, graged, rabos- nplua nuj, ultra- mault tod content, thiab muaj tsawg heev los yog tsis fampspar (orthoclase, plagioclase). Nws yog ib feem ntawm dej hiav txwv lithosphere, thiab yog muab los ntawm sab sauv mantle.
Dunite tsim li cas?
Dunite tshwm sim hauv txheej txheej, gabbroic igneous complexes (saib gabbro). Tej zaum nws yog tsim los ntawm qhov tsub zuj zuj ntawm ntom, thaum ntxov crystallizing nplej ntawm olivine uas tog rau hauv qab ntawm qis silica magmaKev nkag ntawm dunite daim ntawv sills lossis dikes. Qee lub dunite tau hloov pauv los ua serpentine.
Dunite yog dab tsi?
Dunite yog pob zeb ultramafic plutonic uas yog tsim los ntawm olivine "Ultramafic" txhais tau tias mafic minerals tsim ntau dua 90% ntawm cov pob zeb muaj pes tsawg leeg. Feem ntau cov mafic minerals nyob rau hauv ultramafic pob zeb yog tiag tiag pyroxenes thiab olivine (yog hais tias hornblende yog tam sim no nws yog ntxiv rau pyroxenes).
