{"id":6107,"date":"2026-10-19T09:48:29","date_gmt":"2026-10-19T09:48:29","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-jardedlisfraedi-anett-blischke\/"},"modified":"2026-10-19T09:48:29","modified_gmt":"2026-10-19T09:48:29","slug":"doktorsvorn-i-jardedlisfraedi-anett-blischke","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-jardedlisfraedi-anett-blischke\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed jar\u00f0e\u00f0lisfr\u00e6\u00f0i – Anett Blischke"},"content":{"rendered":"
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V\u00f6rninni ver\u00f0ur streymt: https:\/\/www.youtube.com\/user\/HIvarp\/live<\/a><\/strong><\/p>\n

Doktorsefni:<\/strong>\u00a0Anett Blischke<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Jan Mayen sv\u00e6\u00f0i\u00f0 og \u00cdslandssl\u00e9ttan: Jar\u00f0fr\u00e6\u00f0ileg uppbygging, tekt\u00f3n\u00edk, eldvirkni og \u00fer\u00f3un frams\u00e6kinna rekbelta (The Jan Mayen microcontinent and Iceland Plateau: Tectono-magmatic evolution and rift propagation.)<\/p>\n

Andm\u00e6lendur:<\/strong> Dr. Jenny Collier, pr\u00f3fessor vi\u00f0 Jar\u00f0v\u00edsinda- og verkfr\u00e6\u00f0ideild Imperial College London, Bretlandi<\/p>\n

Dr. Sylvie Leroy, forst\u00f6\u00f0uma\u00f0ur ranns\u00f3kna vi\u00f0 Institut des Sciences de la Terre de Paris, Sorbonne-h\u00e1sk\u00f3la, Frakklandi<\/strong><\/p>\n

Lei\u00f0beinandi:<\/strong>\u00a0Brynd\u00eds Brandsd\u00f3ttir, v\u00edsindama\u00f0ur vi\u00f0 Jar\u00f0v\u00edsindastofnun H\u00e1sk\u00f3lans<\/p>\n

A\u00f0rir \u00ed doktorsnefnd:<\/strong>
Dr. Martyn S. Stoker, gistiv\u00edsindama\u00f0ur vi\u00f0 Australian School of Petroleum and Energy Resources, University of Adelaide, \u00c1stral\u00edu.
Dr. Carmen Gaina, pr\u00f3fessor og forst\u00f6\u00f0uma\u00f0ur Jar\u00f0fr\u00e6\u00f0aseturs \u00d3sl\u00f3arh\u00e1sk\u00f3la, Noregi.
Dr. Freysteinn Sigmundsson, v\u00edsindama\u00f0ur vi\u00f0 Jar\u00f0v\u00edsindastofnun H\u00e1sk\u00f3lans.<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:<\/strong>\u00a0Dr. Magn\u00fas Tumi Gu\u00f0mundsson, pr\u00f3fessor og deildarforseti Jar\u00f0v\u00edsindadeildar H\u00e1sk\u00f3la \u00cdslands.<\/p>\n

\u00a0<\/strong><\/p>\n

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

Meginmarkmi\u00f0 \u00feessa verkefnis var a\u00f0 auka skilning okkar \u00e1 uppruna og \u00fer\u00f3un Jan Mayen sv\u00e6\u00f0isins (JMMC) og rekbelta \u00cdslandssl\u00e9ttunnar (Iceland Plateau Rift, IPR), \u00ed samhengi vi\u00f0 opnunarferli og reks\u00f6gu NA-Atlantshafssv\u00e6\u00f0isins, nor\u00f0an \u00cdslands. Myndunarsaga JMMC er tv\u00edskipt; rek eftir \u00c6gishrygg, vi\u00f0 opnun Atlantshafsins, klauf mi\u00f0hluta Austur-Gr\u00e6nlands fr\u00e1 Noregi, og IPR-rekbelti\u00f0 innan \u00cdslandssl\u00e9ttunnar, vestan \u00c6gishryggjar, klauf JMMC fr\u00e1 Austur Gr\u00e6nlandi. IPR-rekbelti\u00f0 skiptist \u00ed fj\u00f6gur a\u00f0skilin sv\u00e6\u00f0i, \u00ed t\u00edma og r\u00fami. Endursko\u00f0a\u00f0 og \u00edtarlegra l\u00edkan af jar\u00f0lagafr\u00e6\u00f0i, eldvirkni og jar\u00f0skorpuhreyfingum sv\u00e6\u00f0isins byggir \u00e1 samt\u00falkun jar\u00f0fr\u00e6\u00f0ilegra, jar\u00f0e\u00f0lisfr\u00e6\u00f0ilegra og jar\u00f0efnafr\u00e6\u00f0ilegra gagna sem afla\u00f0 var \u00e1 \u00e1runum 1960 til 2017; fj\u00f6lgeislam\u00e6lingum; endurkast- og bylgjubrotsg\u00f6gnum; \u00feyngdar-, og segulm\u00e6lingum, borholug\u00f6gnum og bergsy\u0301num, sem og samanbur\u00f0i vi\u00f0 a\u00f0l\u00e6g sv\u00e6\u00f0i. Jar\u00f0lagastafli tert\u00eder- og kvartert\u00edmans skiptist \u00ed ellefu jar\u00f0lagasyrpur sem afmarkast af t\u00edu mismunandi misl\u00e6gjum. Sex tengjast st\u00e6rri, jar\u00f0s\u00f6gulegum atbur\u00f0um \u00ed reks\u00f6gu Nor\u00f0ur-Atlantshafssv\u00e6\u00f0isins, \u00f6nnur sv\u00e6\u00f0isbundnari rofmisl\u00e6gjum. Reksaga sv\u00e6\u00f0isins skiptist \u00ed sj\u00f6 t\u00edmabil eldvirkni og skerhreyfinga, sem endurspegla \u00f3st\u00f6\u00f0ugleika \u00ed jar\u00f0skorpuhreyfingum yfir 30 millj\u00f3n \u00e1ra t\u00edmabil, fr\u00e1 \u00fev\u00ed Atlantshafi\u00f0 opna\u00f0ist um \u00c6gishrygg og innan frams\u00e6kna, sk\u00e1st\u00edga, IPR rekbeltisins. Upprunalega tengdist IPR rekbelti\u00f0 Gr\u00e6nlands-(\u00cdslands)-F\u00e6reyjahrygg en f\u00e6r\u00f0ist s\u00ed\u00f0an til nor\u00f0urs, og h\u00f3f a\u00f0 \u00e9ta sig inn \u00ed meginlandsskorpu Jan Mayenhryggjar. Samhli\u00f0a \u00fer\u00f3un IPR-rekbeltisins minnka\u00f0i rekhra\u00f0i \u00e1 sunnanver\u00f0um \u00c6gishrygg. \u00cd hnotskurn er \u00fer\u00f3unarsagan eftirfarandi: (1) Gli\u00f0nun innan Lauras\u00eduflekans h\u00f3fst \u00e1 pale\u00f3sent\u00edmabilinu (fyrir ~63-56 millj\u00f3num \u00e1ra). Upphaflega mynda\u00f0ist mikill sigdalur nor\u00f0an og austan JMMC, sem samanst\u00f3\u00f0 af l\u00e6gum brotabeltum. \u00c1framhaldandi tog var\u00f0 til \u00feess a\u00f0 meginlandsskorpan slitna\u00f0i og \u00fathafsskorpa mynda\u00f0ist vi\u00f0 \u00f6flugt uppstreymi m\u00f6ttulefnis og mikil fl\u00e6\u00f0igos sem myndu\u00f0u st\u00f3r basaltsv\u00e6\u00f0i (North Atlantic Igneous Province). (2) Byrjun e\u00f3sent\u00edmans (fyrir ~55-53 millj\u00f3num \u00e1ra), einkenndist af myndun mikilla fl\u00e6\u00f0ibasaltlaga, innan sk\u00e1st\u00edgra gosbelta sem \u00fer\u00f3u\u00f0ust fr\u00e1 nor\u00f0ri til su\u00f0urs eftir nor\u00f0austurbr\u00fan JMMC. Fl\u00e6\u00f0ibasaltl\u00f6gunum (seaward dipping reflectors) hallar \u00ed \u00e1tt a\u00f0 \u00c6gishrygg \u00ed Noregsdj\u00fapi. Sv\u00e6\u00f0i\u00f0 opna\u00f0ist eftir me\u00f0 NV-SA-l\u00e6gum brotabeltum, hraun runnu \u00e1 landi og \u00ed sj\u00f3, me\u00f0 m\u00f3bergsmyndunum og m\u00f3bergssetl\u00f6gum \u00e1 grunns\u00e6vi. (3) \u00cd kj\u00f6lfar \u00feess a\u00f0 \u00c6gishryggur a\u00f0skilur Gr\u00e6nland fr\u00e1 Noregi snemma \u00e1 e\u00f3sen (~53-50 Ma), \u00fer\u00f3ast frams\u00e6ki\u00f0 rekbelti (IPR-I) vi\u00f0 su\u00f0urenda hryggjarins, og nor\u00f0urbr\u00fan \u00cdslands-F\u00e6reyjahryggjarins. (4) Gosbeltaflutningar \u00e1 mi\u00f0 og seinni hluta e\u00f3sen (\u223c49-36 Ma) og myndun \u00cdslandssl\u00e9ttunnar. Landrek me\u00f0 innskotavirkni fr\u00e1 SSV til NNA eftir IPR-I og s\u00ed\u00f0an IPR-II rek\u00e1sunum innan \u00cdslandssl\u00e9ttunnar, yfirtekur su\u00f0urhluta \u00c6gishryggjar, \u00fear sem gli\u00f0nun og jar\u00f0skorpumyndun minnka til muna. (5) E\u00f3sen-\u00f3l\u00edg\u00f3sen (\u223c36-25 Ma): IPR-III rek\u00e1sinn me\u00f0 SV-NA stefnu kl\u00edfur su\u00f0urenda Jan Mayen fr\u00e1 Lyngvahrygg vi\u00f0 Hl\u00e9sund og Su\u00f0urhryggir Jan Mayen ver\u00f0a til. T\u00edmabilinu fylgdi auki\u00f0 uppstreymi kviku til nor\u00f0-nor\u00f0austurs, undir \u00e1hrifum fr\u00e1 \u00cdslands heita reitnum me\u00f0 tilheyrandi aukningu \u00ed innskota- og eldvirkni samfara myndun fl\u00e6\u00f0igossyrpna me\u00f0fram sigd\u00f6lum gosbeltanna. (6) S\u00ed\u00f0-\u00f3l\u00edg\u00f3sen (\u223c25-22 Ma): Landrek me\u00f0fram vesturbr\u00fan JMMC innan IPR-IV rek\u00e1ssins me\u00f0 fl\u00e6\u00f0isgossyrpum, IPR-IV er fyrirrennari Kolbeinseyjarhryggjar sem markar upphaf nor\u00f0austurlandsgrunns \u00cdslands. (7) M\u00ed\u00f3sen til n\u00fat\u00edma (22-0 Ma): Me\u00f0 myndun Kolbeinseyjarhryggjar slitnar JMMC endanlega fr\u00e1 Gr\u00e6nlandi og \u00fathafsskorpa ver\u00f0ur til. Verkefni\u00f0 hefur varpa\u00f0 ny\u0301ju lj\u00f3si \u00e1 30 millj\u00f3n \u00e1ra \u00fer\u00f3unars\u00f6gu JMMC, og hvernig su\u00f0urhryggirnir ur\u00f0u til, \u00ed frams\u00e6knu gosbelti innan \u00cdslandssl\u00e9ttunnar, undir \u00e1hrifum af \u00cdslands heita reitnum, sem yfirt\u00f3k rek \u00e1 sunnanver\u00f0um \u00c6gishrygg. \u00d6flug innskotavirkni og eldvirkni innan sk\u00e1st\u00edgra goskerfa, einkenna innvi\u00f0i \u00cdslandssl\u00e9ttunnar og endurspegla fj\u00f6l\u00fe\u00e6ttar gli\u00f0nunar- og skerhreyfingar eftir flekaskilunum sem rekja m\u00e1 \u00ed endurkastsg\u00f6gnunum. Tekt\u00f3n\u00edsk \u00fer\u00f3un ranns\u00f3knarsv\u00e6\u00f0isins er \u00ed m\u00f6rgu l\u00edk \u00cdslandi \u00ed dag, b\u00e6\u00f0i einkennast af \u00f3st\u00f6\u00f0ugum, frams\u00e6knum rekbeltum, me\u00f0 innskotavirkni \u00ed gegnum eldri jar\u00f0lagastafla.<\/p>\n

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

Anett Blischke er f\u00e6dd \u00e1ri\u00f0 1971 og \u00f3lst upp \u00ed Austur-Berl\u00edn \u00ed \u00de\u00fdskalandi. H\u00fan lauk BS-pr\u00f3fi \u00ed jar\u00f0fr\u00e6\u00f0i vi\u00f0 T\u00e6knih\u00e1sk\u00f3lann \u00ed Berl\u00edn 1994 og \u00e1ri seinna framhaldsn\u00e1mi \u00ed jar\u00f0fr\u00e6\u00f0i me\u00f0 \u00e1herslu \u00e1 fjark\u00f6nnun, bergfr\u00e6\u00f0i og grunnvatnsfr\u00e6\u00f0i. Anett lauk MS pr\u00f3fi \u00ed ol\u00edujar\u00f0fr\u00e6\u00f0i og jar\u00f0e\u00f0lisfr\u00e6\u00f0i fr\u00e1 Oklahomah\u00e1sk\u00f3la \u00ed Bandar\u00edkjunum \u00e1ri\u00f0 1997 og starfa\u00f0i s\u00ed\u00f0an hj\u00e1 Phillips ol\u00eduf\u00e9laginu beggja vegna Atlantshafsins, \u00ed Oklahoma, Texas og s\u00ed\u00f0an hj\u00e1 Conoco-Phillips \u00ed Bretlandi til \u00e1rsins 2004. H\u00fan hefur starfa\u00f0 sem s\u00e9rfr\u00e6\u00f0ingur \u00ed borholujar\u00f0fr\u00e6\u00f0i, hafsbotnsjar\u00f0fr\u00e6\u00f0i og jar\u00f0e\u00f0lisfr\u00e6\u00f0i hj\u00e1 \u00cdslenskum orkuranns\u00f3knum \u00e1 Akureyri fr\u00e1 \u00e1rinu 2004.<\/p>\n

Doktorsverkefni Anett grundvallast \u00e1 vi\u00f0amikilli samantekt jar\u00f0fr\u00e6\u00f0i- og jar\u00f0e\u00f0lisfr\u00e6\u00f0ilegra gagna af Jan Mayen-sv\u00e6\u00f0inu og \u00cdslandssl\u00e9ttunni. Uppista\u00f0an \u00ed n\u00fdju l\u00edkani hennar af uppruna og \u00fer\u00f3un rekbelta sv\u00e6\u00f0isins er bygg\u00f0 \u00e1 yfir 30.000 km af endurkastsm\u00e6lil\u00ednum sem \u00cdslenskar orkuranns\u00f3knir og Orkustofnun hafa safna\u00f0 \u00ed samvinnu vi\u00f0 erlendar v\u00edsindastofnanir fr\u00e1 1975.<\/p>\n

Anett er gift Oddi Vilhelmssyni, pr\u00f3fessor \u00ed \u00f6rverufr\u00e6\u00f0i vi\u00f0 H\u00e1sk\u00f3lann \u00e1 Akureyri, og eiga \u00feau tvo syni. Anett h\u00f3f doktorsn\u00e1m \u00ed hafsbotnsjar\u00f0fr\u00e6\u00f0i og jar\u00f0e\u00f0lisfr\u00e6\u00f0i vi\u00f0 H\u00e1sk\u00f3la \u00cdslands 2015.<\/p>\n<\/div><\/div>","protected":false},"featured_media":1911,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_phd_date_start":"2020-05-15T14:00:00+00:00","_phd_date_end":"2020-05-15T16:00:00+00:00","_phd_location":"Ver\u00f6ld - H\u00fas Vigd\u00edsar","_phd_admission":"Fj\u00f6ldatakm\u00f6rkun: Einungis 20 manns geta veri\u00f0 \u00ed salnum \u00e1 me\u00f0an dokorsv\u00f6rninni stendur","_phd_thesis_title":"Jan Mayen sv\u00e6\u00f0i\u00f0 og \u00cdslandssl\u00e9ttan: Jar\u00f0fr\u00e6\u00f0ileg uppbygging, tekt\u00f3n\u00edk, eldvirkni og \u00fer\u00f3un frams\u00e6kinna rekbelta (The Jan Mayen microcontinent and Iceland Plateau: Tectono-magmatic evolution and rift propagation.)","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_jardedlisfraedi_anett_blischke","_phd_source_node_id":"339125","_phd_source_type":"vidburdir","_phd_member_id":528,"footnotes":""},"phd_school":[113,93],"phd_discipline":[114],"class_list":["post-6107","phd_defence","type-phd_defence","status-publish","has-post-thumbnail","hentry","phd_school-jardvisindadeild","phd_school-verkfraedi-og-natturuvisindasvid","phd_discipline-phd-i-jardedlisfraedi"],"_links":{"self":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence"}],"about":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/types\/phd_defence"}],"version-history":[{"count":0,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6107\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/1911"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6107"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6107"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}