Back-arc phiab, submarine phiab uas tsim tom qab ib kob arc Island arc Island arcs yog cov hlua ntev ntawm cov hluav taws kub uas muaj hluav taws xob nrog cov kev ua seismic hnyav pom nyob rau thaj tsam ntawm thaj tsam tectonic (xws li Lub Nplhaib Hluav Taws Xob). Feem ntau cov kob arcs pib ntawm dej hiav txwv crust thiab tau tshwm sim los ntawm qhov qhovntsej thiaj tsis mob ntawm lithosphere mus rau hauv lub mantle raws thaj tsam subductionhttps://en.wikipedia.org › wiki › Island_arc
Island arc - Wikipedia
. Cov bass no feem ntau pom nyob rau sab hnub poob ntawm ntug dej hiav txwv Pacific ze ntawm kev sib koom ua ke ntawm ob daim phiaj tectonic.
roob hluav taws rov qab yog dab tsi?
thaj tsam qaum teb yog thaj chaw qab roob hluav taws kub. Nyob rau hauv cov kob volcanic arcs nws muaj back-arc basins ntawm dej hiav txwv crust nrog abyssal depths, uas tej zaum yuav raug cais los ntawm seem arcs, zoo ib yam li cov kob arcs.
Vim li cas lub pas dej rov qab tsis tshua muaj niaj hnub no?
Qhov dav txwv ntawm nraub qaum-arc basins yog tej zaum vim magmatic kev ua si nyob ntawm dej thiab induced mantle convectionthiab cov no yog ob qho tib si concentrated nyob ze thaj tsam subduction. Kev sib kis sib txawv ntawm kev sib kis qeeb heev (Mariana Trough), ob peb centimeters hauv ib xyoos, mus nrawm heev (Lau Basin), 15 cm / xyoo.
Dab tsi yog qhov chaw rov qab-arc kis tau?
: thaj chaw geological uas tsim ntawm thaj tsam subduction thaum lub phaj overriding thins thiab pib nthuav tawm -feem ntau siv ua ntej lwm lub npe Lub qhov dej kub uas tsis muaj kev sib txuas nrog rau midocean ridge system: lawv pw ntawm dab tsi yog hu ua ib tug back-arc kis chaw, a geological feature uas tshwm sim tsis qhov twg ob…
lub phiab pem hauv ntej nyob qhov twg?
Forearc basins yog marine depositional bass ntawm trench sab ntawm arcs (Daim duab 3.16), thiab lawv sib txawv ntawm qhov loj thiab abundance nrog rau theem evolutionary ntawm ib tug arc.
