Phenocrysts yog plagioclase (dawb) thiab pyroxene (dub). Dav ntawm cov qauv 14 cm. Qhov no los ntawm Oahu yog kom meej meej tsis yog qhov classic version ntawm porphyry vim nws yog mafic, nws yog extrusive, thiab phenocrysts yog mafic. … Andesite yog qhov sib npaug ntawm diorite
Yog andesite porphyry mafic or felsic?
Andesite yog INTERMEDIATE hauv kev sib xyaw ntawm MAFIC thiab FELSIC pob zeb. Kev sib xyaw ntawm mafic thiab felsic minerals muab lub pob zeb "ntsev thiab kua txob" zoo li. DIORITE - phaneritic pob zeb (cov muaju loj) ntawm ob qho tib si mafic thiab felsic minerals.
YPuas yog peridotite felsic lossis mafic?
Peridotite yog ib qho tuab heev, ntxhib-grained, olivine-nplua nuj, ultra- mafic intrusive pob zeb. Nws tau sau tseg rau nws cov ntsiab lus silica tsawg, thiab muaj tsawg heev lossis tsis muaj feldspar (orthoclase, plagioclase).
Puas granite yog mafic?
Granite thiab rhyolite yog xav felsic, hos bas alt thiab gabbro yog mafic (nias ntawm no yog xav paub ntxiv txog mafic thiab felsic). … Txij li thaum lub ntiaj teb nto yog npog los ntawm dej hiav txwv thiab continental crustal cov ntaub ntawv, granite thiab bas alt muaj ntau heev.
Dab tsi yog 3 cov zaub mov uas muaj nyob hauv ib qho andesite?
Igneous pob zeb muaj pes tsawg leeg daim ntawv qhia: Daim ntawv qhia no qhia tias andesite feem ntau yog tsim los ntawm plagioclase, amphiboles, thiab micas; Qee zaum nrog me me ntawm pyroxenes, quartz, lossis orthoclase.
