Qhov twg mantle plumes originates?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

A plua plav yog ib qho nqaim cylindrical thermaldiapir ntawm cov khoom siv tsawg-density uas keeb kwm tob hauv mantle , los ntawm mantle -core ciam teb (ntawm qhov tob txog 2900km), lossis los ntawm 670km kev tsis sib txuas ntawm lub hauv paus ntawm sab sauv mantle.

Nyob rau hauv no txoj kev, yuav ua li cas yog mantle plumes tsim?

Plumes yog postulated nce los ntawm lub mantle thiab pib ib nrab yaj ntawm ncav cuag qhov tob tob hauv asthenosphere los ntawm decompression melting. Qhov no yuav tsim cov ntim loj ntawm magma. Cov plam hypothesispostulates tias qhov no melts nce mus rau saum npoo thiab erupts tsim "kub me ntsis".

Ib yam li ntawd, yog vim li cas mantle plumes nqaim? Mantle plumes nqa kub nce mus rau hauv nqaim , nce kab raws li qhov tshwm sim ntawm kev sib pauv cua sov thoob plaws lub hauv paus- mantle ciam teb (qhov tseem ceeb yog kub ntau tshaj qhov mantle thiab qhov kub sib txawv no ua rau ntau lub zog tso tawm los ntawm qhov txiv kab ntxwv ).

puas yog mantle plumes thiab hotspots tib yam?

Hawaiian volcanism yog tshwm sim los ntawm dab tsi yog hu ua ' kub qhov chaw .' Lwm 5% yog xav tias yuav cuam tshuam nrog mantle plumes thiab cov chaw kub. Mantle plumes yog thaj chaw uas muaj cua sov thiab/los yog pob zeb hauv mantle yog nce mus rau saum npoo. A kub qhov chaw yog qhov nthuav qhia ntawm tus plua plav.

Yog vim li cas lub hypothesis ntawm mantle plumes tseem tsis tau txais universally?

Cov hypothesis ntawm mantle plumes yog notuniversally txais . Ntau ntawm nws qhov kev kwv yees muaj tsis tau lees paub los ntawm kev soj ntsuam. Qhov no ntaus nqi volcanoes topassive leakage ntawm magma los ntawm lub mantle mus rau lub ntiaj teb saum npoo qhov chaw txuas ntxiv ntawm lithosphere tso cai rau nws.