2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Yog tias ob daim phiaj yog dej hiav txwv, xws li nyob rau sab hnub poob Pacific Dej hiav txwv, roob hluav taws tsim ib txoj kab nkhaus ntawm cov Islands tuaj, lub npe hu ua cov kob arc, uas yog sib npaug mus rau trench, Raws li nyob rau hauv cov ntaub ntawv ntawm Mariana Islands thiab cov nyob ib sab Mariana Trench.
Puas yog roob hluav taws arc tib yam li kob arc?
A volcanic arc yog cov kab hluav taws xob, ntau pua mus rau txhiab mais ntev, uas ua rau saum thaj tsam subduction. Ib qho island volcanic arc cov ntaub ntawv hauv dej hiav txwv ntawm dej hiav txwv-dej hiav txwv subduction. … Ib lub roob hluav taws kub hnyiab tau ua raws cov npoo ntawm lub teb chaws uas dej hiav txwv crust subducts hauv qab teb chaws av av.
piv txwv ntawm cov kob arcs yog dab tsi?
Qee cov piv txwv paub zoo ntawm cov kob arcs yog Nyiv, Aleutian Islands ntawm Alaska, Mariana Islands, tag nrho cov uas nyob hauv Pacific, thiab Tsawg Antilles hauv Caribbean. Kev nplua nuj ntawm pob zeb volcanic nyob ib ncig ntawm Dej Hiav Txwv Pacific tau ua rau lub npe ntawm Pacific margin ua "Ring of Fire".
Vim li cas Hawaii tsis yog volcanic Island arc?
Island arcs yog volcanic Islands tuaj uas ua rau tib lub sijhawm mus rau dej hiav txwv trenches hauv subduction zones. Lub Pacific Ring of Fire yog lub tsev rau ntau pawg ntawm cov Islands tuaj. Lub roob hluav taws uas tsim saum cov chaw kub xws li Hawaiian Islandstsis yog roob hluav taws kub.
Puas yog volcanic Island arc divergent?
Cov magma tshiab (lub pob zeb molten) nce thiab tuaj yeem tawg ua rau lub roob hluav taws, feem ntau tsim cov arcs ntawm cov kob rawslub convergent ciam teb. Thaum ob daim phiaj txav deb ntawm ib leeg, peb hu qhov no daim phiaj sib txawv.
Pom zoo:
Thaum volcanic eruption volcanic khoom puas yog?
Volcanic eruptions tsim peb yam khoom: gas, lava, thiab fragmented khib nyiab hu ua tephra. Cov ntaub ntawv dab tsi siv rau hauv kev tawg hluav taws kub? ash, ciders, kub tawg, thiab cov foob pob pov tseghauv cov khoom tawg yog cov khoom loj uas tau pom nyob rau hauv volcanic eruptions thoob ntiaj teb.
Volcanic eruptions puas cuam tshuam rau huab cua?
roob hluav taws tuaj yeem cuam tshuam kev hloov pauv huab cua. Thaum lub sij hawm tawg loj heev, cov roj hluav taws xob ntau ntau, cov aerosol, thiab cov hmoov tshauv raug txhaj rau hauv stratosphere. … Tab sis volcanic gases xws li sulfur dioxide tuaj yeem ua rau lub ntiaj teb txias, thaum volcanic carbon dioxide, lub tsev cog khoom roj, muaj peev xwm los txhawb lub ntiaj teb sov.
Volcanic eruption yog dab tsi?
Ib volcanic eruption yog thaum lava thiab roj tawm ntawm lub roob hluav taws-qee zaum tawg. … Hom eruption uas txaus ntshai tshaj plaws yog hu ua 'glowing avalanche' uas yog thaum tshiab magma ntws los rau sab ntawm lub roob hluav taws. volcanic eruption yog dab tsi thiab nws ua li cas?
Vim li cas volcanic eruptions yog unpredictable nyob rau hauv lub sij hawm luv luv?
Lub ntiaj teb lub peev xwm los hloov pauv txhua qhov hloov pauv? Yog vim li cas volcanoes tsis muaj lub sij hawm luv luv ntawm eruptions. Lawv yog inherently unpredictable. Cov xwm txheej no hloov pauv hauv lub tshuab hluav taws xob txhua lub sijhawm ib yam nkaus, uas txhais tau hais tias qhov kev sib hloov pauv hloov pauv rau txhua tus neeg lub roob hluav taws.
Puas yog andesite volcanic lossis plutonic?
Andesite. Andesite yog volcanic (=extrusive igneous) pob zeb nrog rau nruab nrab rau cov ntsiab lus siab silica. Nws yog qhov sib npaug ntawm diorite diorite Diorite, ua ib qho kev sib xyaw ntawm cov zaub mov, sib txawv hauv nws cov khoom, tab sis feem ntau nws yog ib qho nyuaj (nws cov ntxhia tseem ceeb muaj hardnesses ntawm ncig 6 ntawmlub Mohs nplai).
