{"id":6253,"date":"2026-10-19T09:48:41","date_gmt":"2026-10-19T09:48:41","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-jardfraedi-eemu-ranta\/"},"modified":"2026-10-19T09:48:41","modified_gmt":"2026-10-19T09:48:41","slug":"doktorsvorn-i-jardfraedi-eemu-ranta","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-jardfraedi-eemu-ranta\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed jar\u00f0fr\u00e6\u00f0i – Eemu Ranta"},"content":{"rendered":"
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V\u00f6rninni ver\u00f0ur streymt<\/strong><\/a><\/p>\n

Doktorsefni:<\/strong>\u00a0Eemu Ranta<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Ranns\u00f3kn \u00e1 jar\u00f0skorpu og jar\u00f0m\u00f6ttli undir \u00edslenskum eldfj\u00f6llum me\u00f0 st\u00f6\u00f0ugum sams\u00e6tum reikulla efna (Stable isotopes of volatile elements as a window into the crust and mantle beneath Icelandic volcanoes)<\/p>\n

Andm\u00e6lendur:<\/strong>
<\/strong>Dr. Jacqueline E. Dixon, pr\u00f3fessor vi\u00f0 College of Marine Science, University of South Florida, Bandar\u00edkjunum
Dr. James Farquhar, pr\u00f3fessor vi\u00f0 Department of Geology, University of Maryland, Bandar\u00edkjunum<\/p>\n

Lei\u00f0beinendur: <\/strong>Dr. S\u00e6mundur Ari Halld\u00f3rsson, v\u00edsindama\u00f0ur vi\u00f0 Jar\u00f0v\u00edsindastofnun H\u00e1sk\u00f3la \u00cdslands
Dr. Andri Stef\u00e1nsson, pr\u00f3fessor vi\u00f0 Jar\u00f0v\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

Einnig \u00ed doktorsnefnd:<\/strong>
Dr. Peter H. Barry, fr\u00e6\u00f0ima\u00f0ur vi\u00f0 Woods Hole Oceanographic Institution, Bandar\u00edkjunum<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:<\/strong>\u00a0Dr. Freysteinn Sigmundsson, v\u00edsindama\u00f0ur vi\u00f0 Jar\u00f0v\u00edsindastofnun og deildarforseti Jar\u00f0v\u00edsindadeildar H\u00e1sk\u00f3la \u00cdslands<\/p>\n

\u00c1grip<\/strong><\/p>\n

Reikul efni og s\u00e9r \u00ed lagi sams\u00e6tur \u00feeirra (t.d. H2O, He, B, CO2, S, Cl), veita margv\u00edslegar uppl\u00fdsingar um kvikuferli, sem og uppsprettur \u00feeirra \u00ed m\u00f6ttli og skorpu. \u00cd \u00feessari ritger\u00f0 eru lag\u00f0ar fram fimm greinar \u00fear sem reikul efni, uppleyst \u00ed kviku og \u00ed jar\u00f0hitav\u00f6kva, eru k\u00f6nnu\u00f0 me\u00f0 \u00fea\u00f0 a\u00f0 markmi\u00f0i a\u00f0 auka skilning okkar \u00e1 skorpuferlum, dj\u00fapst\u00e6\u00f0ri og grunnst\u00e6\u00f0ri kvikuafg\u00f6sun. S\u00e9rst\u00f6k \u00e1hersla var l\u00f6g\u00f0 \u00e1 a\u00f0 rannsaka basalt og jar\u00f0hitav\u00f6kva \u00far Kverkfjalla-eldst\u00f6\u00f0vakerfniu me\u00f0 tilliti til \u00feessara markmi\u00f0a.<\/p>\n

Ni\u00f0urst\u00f6\u00f0ur eru eftirfarandi: (1) Nota m\u00e1 sams\u00e6tur kl\u00f3rs \u00ed s\u00faru \u00edslensku bergi til a\u00f0 varpa lj\u00f3si \u00e1 samspil v\u00f6kva og br\u00e1\u00f0ar. S\u00fdnt er fram \u00e1 a\u00f0 \u00e1\u00f0ur \u00f3\u00feekkt ferli, meltun kvikup\u00e6kla, er a\u00f0 \u00f6llum l\u00edkindum grundvallar\u00fe\u00e1ttur vi\u00f0 myndun s\u00fars bergs h\u00e9r \u00e1 landi sem og annars sta\u00f0ar. (2) Sams\u00e6tur brennisteins \u00ed \u00edslensku basalti bera vott um fl\u00f3kin skorpuferli \u00e1samt margbreytilegum uppsprettum brennisteins \u00ed \u00edslenska jar\u00f0m\u00f6ttlinum. (3) Dj\u00fapst\u00e6\u00f0 kvikuafg\u00f6sun gegnum jar\u00f0hitakerfi Kverkfjalla og \u00d6skju er helsta uppspretta CO2 og S og er \u00fatstreymi \u00feeirra fr\u00e1 m\u00f6ttli til andr\u00famslofts raki\u00f0. (4) Jar\u00f0efnafr\u00e6\u00f0i bergs \u00far Kverkfjallakerfinu er best sk\u00fdr\u00f0 me\u00f0 hli\u00f0sj\u00f3n af \u00feykku steinhveli sem l\u00edklegt er a\u00f0 stj\u00f3rni lengd br\u00e6\u00f0slus\u00falu undir sv\u00e6\u00f0inu sem og \u00f3samhverfu \u00ed m\u00f6ttul\u00fe\u00e1ttum eins og \u00feeir birtast okkur \u00ed basalti Mi\u00f0h\u00e1lendisins. (5) Uppleyst reikulefni \u00ed basalti Kverkfjallakerfisins bera keim af m\u00f6ttli sem endurteki\u00f0 hefur veri\u00f0 au\u00f0ga\u00f0ur me\u00f0 v\u00f6kvum er losa fr\u00e1 s\u00f6kkvandi \u00fathafsfleka \u00e1 ni\u00f0urstreymisflekam\u00f3tum.<\/p>\n

Um doktorsefni\u00f0<\/strong><\/p>\n

Eemu Ranta f\u00e6ddist \u00e1ri\u00f0 1989 og \u00f3lst upp \u00ed Tampere \u00ed Finnlandi, Grenoble \u00ed Frakklandi og Gautaborg \u00ed Sv\u00ed\u00fej\u00f3\u00f0. Eemu lauk BSc-gr\u00e1\u00f0u \u00ed jar\u00f0v\u00edsindum fr\u00e1 Stokkh\u00f3lmsh\u00e1sk\u00f3la \u00e1ri\u00f0 2015 og MSc-gr\u00e1\u00f0u \u00ed jar\u00f0fr\u00e6\u00f0i fr\u00e1 H\u00e1sk\u00f3lanum \u00ed Helsinki \u00e1ri\u00f0 2017. Eemu h\u00f3f st\u00f6rf sem styrk\u00feegi \u00e1 Norr\u00e6na eldfjallasetrinu \u00ed \u00e1g\u00fast 2017. Stuttu seinna h\u00f3f hann svo formlegt doktorsn\u00e1m vi\u00f0 H\u00e1sk\u00f3la \u00cdslands. Hann b\u00fdr \u00ed Reykjav\u00edk \u00e1samt konu sinni, myndlistarkonunni Pauliinu Jokela, og Neeme,7 \u00e1ra.
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