Porphyrys yog tsim los ntawm a ob-theem txias ntawm nce magma . … Thib ob, lub magma txias sai sai ntawm qhov tob tob uas tau txhaj tshuaj los yog extruded los ntawm lub roob hluav taws, tso cai rau tsim cov pob zeb me me hauv cov av hauv av Cov matrix lossis cov pob zeb hauv av yog cov khoom siv zoo tshaj plaws. nyob rau hauv uas loj nplej, muaju los yog clasts yog embedded . Lub matrix ntawm lub pob zeb igneous muaj cov finer-grained, feem ntau microscopic, muaju nyob rau hauv uas loj crystals (phenocrysts) yog embedded. https://en.wikipedia.org › wiki › Matrix_(geology)
Matrix (geology) - Wikipedia
Yuav ua li cas peb thiaj tau phenocrysts hauv lub lava?
Qhov no qhia tias feem ntau cov phenocrysts hauv Kutsugata lava yog tsim los ntawm kev sib zog ntawm magma thaum nce toj hauv cov kav dej, tsis yog los ntawm kev txias thaum nyob hauv lub magma reservoir.
Dab tsi yog phenocrysts hauv pob zeb tsis pom kev?
Ib tug loj siv lead ua embedded nyob rau hauv ib tug finer-grained los yog glassy igneous pob zeb. Lub xub ntiag ntawm phenocrysts muab lub pob zeb ua porphyritic kev ntxhib los mos (saib daim duab). Phenocrysts feem ntau sawv cev los ntawm feldspar, quartz, biotite, hornblende, pyroxene thiab olivine.
Pab porphyry ua li cas?
Cov porphyry deposits yog tsim los ntawm kev sib txawv thiab txias ntawm ib kem ntawm nce magma nyob rau theem. Cov theem sib txawv ntawm cov cua txias tsim porphyritic textures intrusive thiabzoo li hauv pob zeb subvolcanic.
Syenite tsim li cas?
Syenites yog cov khoom lag luam ntawm alkaline igneous kev ua haujlwm, feem ntau tsim nyob rau hauv cov cheeb tsam sab av loj, lossis hauv thaj chaw Cordilleran subduction. Txhawm rau tsim cov syenite, nws yog ib qho tsim nyog yuav tau yaj cov pob zeb lossis cov igneous protolith mus rau qhov qis qis ntawm ib nrab ntawm cov yaj.
