Granitic, lossis rhyolitic, magmas thiab andesitic magmas yog tsim ntawm cov phaj sib dhos qhov chaw dej hiav txwv lithosphere oceanic lithosphere Oceanic crust yog kwv yees 6 km (4 mais) tuab. Nws yog tsim los ntawm ob peb txheej, tsis suav nrog cov sediment overlying. https://www.britannica.com › science › dej hiav txwv-crust
Oceanic crust | geology | Britannica
(txheej txheej ntawm lub ntiaj teb tsim los ntawm cov crust thiab sab sauv mantle) yog subducted kom nws ntug nyob rau hauv qab ntawm ntug ntawm lub continental phaj los yog lwm yam dej hiav txwv phaj.
hom magma feem ntau pom ntawm thaj tsam subduction?
Stratovolcanoes zoo li tsim ntawm thaj chaw subduction, lossis cov phaj sib txuas sib txuas, qhov twg cov phaj dej hiav txwv swb hauv qab phaj teb chaws thiab ua rau nce ntawm magma rau saum npoo.
andesitic volcanoes tshwm sim nyob qhov twg?
Andesites tawg ntawm qhov kub ntawm 900 txog 1100 ° C. Qhov tseeb: Lo lus andesite yog muab los ntawm Andes Roob, nyob nyob rau sab hnub poob ntawm South America, qhov twg andesite pob zeb yog common.
Yuav ua li cas andesitic magma tsim?
Andesitic magma yog tsim los ntawm ntub ib nrab melting ntawm lub mantle. Lub mantle nyob rau hauv dej hiav txwv muaj kev sib cuag nrog dej. … Bas altic magma uas muaj cov ntsiab lus dej siab yog qhov tshwm sim. Yog hais tias hom bas altic magma melts nrog continental crust uas muaj siabQhov ntom ntawm dioxide silicon, andesitic magma yuav tsim.
Yuav ua li cas yog magma generated raws subduction zones?
Subduction rog hloov pauv hauv siab thiab kub ua rau magma tiam. … Decompression melting txo qhov kub ntawm tej yam minerals yuav pib yaj yog li tsim ib nrab yaj.
