hotspot (bhoogarbhshastra)

bhoogarbhashastrat, hotspot (kinwa hotspot) hii jwalamukhichi thikane aahet jee aaspaschya aavaranachya tulanet visangatpane garam asalelya antargat aavarnadvare poshit kelee jaatat asey manale jaate. udaharananmadhye havai, eyesland aanee yelostone hotspot yancha samavesh hoto. pruthvichya prushthbhagavaril hotspotchi sthitee vivartanik platechya simanpasoon swatantra asate aanee tyamule plates tyanchya varr sarkat asatana hotspot jwalamukhichi sakhali tayar karoo shakatat.
done gruhitak aahet jeey tyanchya utpattiche spashtikaran denyacha prayatna karatat. eka asey suchavate qee hotspot heey aavaranatil plummule aahet jeey coor-aavaran simevarun aushnik diaper mhanoon vadhatat. paryayi plate siddhant assa aahe qee hotspotchya khalee asalela aavaran srot visangatpane garam nasato, tarr vareel kavach asamanyapane kamkuvat kinwa patal asate, jenekarun lithospheric vistar uthal kholitoon vitalanyachya nishkriy vadhis anumati deto.
mool.
hotspotchya sankalpanechi utpatti jeey chya karyat aahe. 1963 madhye zuzo willsonne asey gruheet dharale qee hawaiyan betanchi nirmiti prushthbhagachya khalee ushna pradeshat vivartanik platechya santh halchalimule jhaali. nantar asey gruheet dharale gele qee bhuprushthachya gabha-gabhachya simevarun simevarun garam gabhachya arund pravahanmule hotspotla mental plume navachya sanrachanet paanee dile jaate. asey aavaraniy patt astitvat aahet qee nahee haah pruthvi vidnyanatil eka motha vadacha vishay aahe.
jwalamukhicha rachnatmak kinwa vidhvansak pattyachya maryadeshi sambandh nasalelya konatyahi thikani, hotspotchi sankalpana tyachya utpattiche spashtikaran denyasathi vaparali gelee aahe. courtilot aanee itarancha eka punaravalokan lekh. sambhavya hotspotchi yadee kelyane aavaranatil khol kholitoon kholitoon prathamik hotspot aanee aavaranatil plummadhun plummadhun duyyam hotspotmadhye farak hoto. prathamik hotspot coor/mental simepasoon udbhavtat aanee resheey margansah mothe jwalamukhi prant tayar karatat (easter bett, eyesland, havai, door, louiville, punarmilan aanee triston pushti; galapagos, kargulen aanee marcuarus sambhavate). duyyam hotspot varchya/khalchya aavaran simevar ugam pavtat aanee mothe jwalamukhi prant tayar karat naheet, parantu betanchya sakhalya (samoa, tahiti, cook, pitcairn, carolin, mcdonald pushti, 20 kinwa tyahoon adhik shakya). itar sambhavya hotspot heey tanavamule lithospheric vighatan jhalelya bhagat uthal aavaran samgrichya prushthbhagavar padanyacha parinam aahet aanee asha prakare jwalamukhicha eka atishay vegala prakar aahe.
aavaranatil plumdware bharavale jaau jaau hotspotchya sankhyecha andaj sumare 20 teey anek hajarancha aahe, bahutek bhoogarbhshastradnya kahee daha astitvat asalyacha vichar karatat. havai, runion, yelostone, galapagos aanee eyesland heey kahee sarvat sakriy jwalamukhiy pradesh aahet, jyasathi heey gruhitak lagoo kele jaate.
rachana.
bahutek hotspot jwalamukhi besaltic asatat (udaa.jee., havai, tahiti). parinami, teey subduction zoan jwalamukhinpeksha qamee sphotak asatat, jyamadhye paanee adhirohan pletkhali adakale asate. jethe khandiy pradeshanmadhye hotspot aadhaltat, tethe besaltic magma khandiy kavachatoon ugavato, joou vitaloon rhiolites tayar karato. heey rhiolites hinsak udrek nirman karoo shakatat. udaharanarth, bhuvaidnyanik itihasatil kahee sarvat shaktishali jwalamukhi sphotanmule pivalya dagadi kalderachi nirmiti jhaali. tathapi, jevha riolite purnapane futate, tevha tyach lithospheric fatyanmadhun (lithospheremadhil darade) besaltic magmacha udrek houu shakato. yaa upkramache eka udaharan mhanje british kolambiyamadhil ilgachuz shreni, jee trachite aanee riolite udrekanchya suruvatichya jatil malikedware aanee besaltic lava pravahachya kramachya usheera baher kadhanyane tayar kelee gelee hotee.
hotspot gruhitak aata maintal plume gruhitkanshi jawalun jodalele aahe.
subduction zoan bett kamanichya viruddha.
hotspot jwalamukhiche mool betanchya kamanitil jwalamukhinpeksha moolbhootpane vegale asalyache manale jaate. nantarche, prushthbhagachya simanche abhisaran kartana, subduction zonvar tayar hote. jevha eka sagari plate dusarila milate, tevha daat plate khalee khol sagari khandkat dhakalali jaate. hii plate, jasjashi tee qamee hott jaate, talashi asalelya talachya talashi paanee sodate aanee heey paanee khadakat misalate, asha prakare tyachi rachana badalate jyamule kahee khadak vitalatat aanee varr chadhatat. hetch alaskajavalil aleutian betansarkhya jwalamukhinchya sakhalila indhan puravate.
hotspot jwalamukhi sakhali.
sanyukt aavaran plume/hotspot gruhitkamadhye, khand aanee samudra tall varchya bajula sarkat asatana, poshak sanrachana ekmekanchya sapeksh nishchit karanyachi kalpana aahe. asha prakare gruhitak asey bhakit karate qee jwalamukhichya kaal-pragatishil sakhalya prushthbhagavar vikasit hotat. yelostone hii udaharane aahet, jee namshesh jhalelya kalderasachya sakhalichya shevati aahe, jee paschimekade haloohaloo junie hott jaate. aanakhi eka udaharan mhanje hawaiyan dweepsamuh, jithe bete uttarottar junie hott jaatat aanee vayvyes adhik kholvar nasht hotat.
bhuvaidnyanikanni pruthvichya vivartanik pattyanchya halchalincha magova ghenyasathi hotspot jwalamukhi sakhali vaparnyacha prayatna keela aahe. khoop lamb sakhalyanchya abhavamule, anek vela pragatishil naslyamule (udaa.jee. galapagos) aanee hotspot ekmekanshi sambandhit sthir disat naheet (udaa.jee. havai aanee eyesland).
2020 madhye, aamhi aanee itar. sumare 10 kotee varshanpurvi havai-samrat seamount sakhalichya gruhitakit maintal plume heddware tayar jhalelya sagari patharala shodhanyasathi bhookampachya tomographycha vapar keela gela, jeey aata purv cyberiakhali 800 kimichya kholiparyant qamee jhaale aahe.
hehee pahaa.
<bii. aar.>

