{"id":6121,"date":"2026-10-19T09:48:30","date_gmt":"2026-10-19T09:48:30","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsfyrirlestur-i-jardedlisfraedi-lea-levy\/"},"modified":"2026-10-19T09:48:30","modified_gmt":"2026-10-19T09:48:30","slug":"doktorsfyrirlestur-i-jardedlisfraedi-lea-levy","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsfyrirlestur-i-jardedlisfraedi-lea-levy\/","title":{"rendered":"Doktorsfyrirlestur \u00ed jar\u00f0e\u00f0lisfr\u00e6\u00f0i – L\u00e9a Levy"},"content":{"rendered":"
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Doktorsefni:<\/strong>\u00a0L\u00e9a Levy<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Rafeiginleikar jar\u00f0hitaummynda\u00f0s bergs: Samt\u00falkun m\u00e6linga \u00e1 yfirbor\u00f0i jar\u00f0ar, \u00ed borholum og \u00e1 ranns\u00f3knastofu<\/p>\n

Lei\u00f0beinandi:<\/strong>\u00a0Dr. Freysteinn Sigmundsson, v\u00edsindama\u00f0ur vi\u00f0 Jar\u00f0v\u00edsindastofnun H\u00e1sk\u00f3lans<\/p>\n

Einnig \u00ed doktorsnefnd:<\/strong><\/p>\n

Dr. \u00d3lafur G. Fl\u00f3venz, jar\u00f0e\u00f0lisfr\u00e6\u00f0ingur og forstj\u00f3ri \u00cdSOR
Gylfi P\u00e1ll Hersir, jar\u00f0e\u00f0lisfr\u00e6\u00f0ingur hj\u00e1 \u00cdSOR
Dr. Pierre Briole, pr\u00f3fessor vi\u00f0 Ecole Normale Sup\u00e9rieure, Par\u00eds, Frakklandi
Dr. Benoit Gibert, s\u00e9rfr\u00e6\u00f0ingur vi\u00f0 H\u00e1sk\u00f3lann \u00ed Montpellier, Frakklandi<\/p>\n

Um er a\u00f0 r\u00e6\u00f0a sameiginlega doktorsgr\u00e1\u00f0u me\u00f0 Ecole Normale Superieure (ENS) \u00ed Frakklandi. V\u00f6rnin f\u00f3r fram 15. febr\u00faar s\u00ed\u00f0astli\u00f0inn vi\u00f0 ENS h\u00e1sk\u00f3lannn \u00ed Frakklandi.<\/p>\n

Andm\u00e6lendur voru:<\/strong>
<\/strong>Dr. Lee Slater, pr\u00f3fessor vi\u00f0 Rutgers University, Newark NJ, Bandar\u00edkjunum
Dr. Jean-Fran\u00e7ois Girard, pr\u00f3fessor vi\u00f0 University of Strasbourg, Frakklandi<\/p>\n

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

Rafeiginleikar bergs, b\u00e6\u00f0i e\u00f0lisvi\u00f0n\u00e1m og fasvik, \u00e1 eldfjallasv\u00e6\u00f0um er m.a. h\u00e1\u00f0 p\u00f3ruhluta (holr\u00fdmd) bergs, styrk uppleystra j\u00f3na \u00ed p\u00f3ruv\u00f6kvanum (seltu), magni raflei\u00f0andi steinda \u00ed berginu, hita \u00feess og hvort \u00fea\u00f0 er br\u00e1\u00f0i\u00f0 e\u00f0a storki\u00f0. Rafsegulm\u00e6lingar eru nota\u00f0ar til \u00feess a\u00f0 sko\u00f0a innri ger\u00f0 eldfjalla og kanna h\u00e1hitasv\u00e6\u00f0i me\u00f0 \u00fev\u00ed a\u00f0 b\u00faa til vi\u00f0n\u00e1msl\u00edk\u00f6n af \u00feeim. T\u00falkun \u00feeirra er oft fl\u00f3kin og vandasamt er a\u00f0 greina \u00e1 milli fyrrnefndra \u00fe\u00e1tta sem hafa \u00e1hrif \u00e1 e\u00f0lisvi\u00f0n\u00e1m ogfasa. \u00deessari ritger\u00f0 er \u00e6tla\u00f0 a\u00f0 auka skilning \u00e1 e\u00f0lisvi\u00f0n\u00e1mi jar\u00f0laga \u00ed virkum eldst\u00f6\u00f0vum \u00ed \u00fev\u00ed skyni a\u00f0 \u00fer\u00f3a \u00fe\u00e1 t\u00e6kni sem notu\u00f0 er til \u00feess a\u00f0 meta st\u00e6r\u00f0 og eiginleika h\u00e1hitasv\u00e6\u00f0a. Ritger\u00f0in fjallar einkum um raflei\u00f0andi steindir, sem eru anna\u00f0 hvort m\u00e1lmlei\u00f0arar (leirsteindir, einkum smekt\u00edt) e\u00f0a h\u00e1lflei\u00f0arar (p\u00fdr\u00edt og j\u00e1rnox\u00ed\u00f0). Einnig eru ranns\u00f6ku\u00f0 \u00e1hrif p\u00f3ruhluta, styrks j\u00f3na \u00ed p\u00f3ruv\u00f6kva, hita og br\u00e1\u00f0nunar bergs. J\u00e1rnox\u00ed\u00f0 eru a\u00f0 mestu frumsteindir, \u00fe.e.a.s. \u00feau kristallast \u00feegar bergkvikan k\u00f3lnar. Smekt\u00edt- og p\u00fdr\u00edt myndast hins vegar sem \u00fatfellingar e\u00f0a vi\u00f0 ummyndun og bera vitni um hringr\u00e1s jar\u00f0hitav\u00f6kva. Notu\u00f0 eru g\u00f6gn fr\u00e1 eldst\u00f6\u00f0vakerfi Kr\u00f6flu en \u00fear eru til miklar heimildir eins og borholug\u00f6gn, borkjarnar, og yfirbor\u00f0sm\u00e6lingar og g\u00f3\u00f0 a\u00f0sta\u00f0a til ranns\u00f3kna. \u00c1hrif smekt\u00edts \u00ed bergi \u00e1 e\u00f0lisvi\u00f0n\u00e1m bergs\u00fdna voru m\u00e6ld vi\u00f0 stofuhita \u00ed tilraunastofu. P\u00f3rur \u00feeirra voru metta\u00f0ar v\u00f6kva me\u00f0 breytilegum styrk j\u00f3na og \u00e1hrifin k\u00f6nnu\u00f0 me\u00f0 litr\u00f3fsm\u00e6lingu \u00e1 e\u00f0lisvi\u00f0n\u00e1mi og fasa (tvinnt\u00f6lu-vi\u00f0n\u00e1m). Ni\u00f0urst\u00f6\u00f0ur s\u00fdna \u00f3l\u00ednulegar breytingar \u00ed vi\u00f0n\u00e1mi vi\u00f0 1 kHz t\u00ed\u00f0ni sem fall af seltu v\u00f6kvans. S\u00fa tilg\u00e1ta er sett fram a\u00f0 lei\u00f0ni milli at\u00f3mlaga \u00ed krist\u00f6llum, interfoliar conduction, eigi mikilv\u00e6gan \u00fe\u00e1tt \u00ed raflei\u00f0ni smekt\u00edts. \u00c1hrif p\u00fdr\u00edts- og j\u00e1rnox\u00ed\u00f0steinda \u00e1 rafr\u00fdmd bergs var k\u00f6nnu\u00f0 me\u00f0 \u00fev\u00ed a\u00f0 sko\u00f0a hvernig fasahorn tvinnt\u00f6luvi\u00f0n\u00e1ms er h\u00e1\u00f0 t\u00ed\u00f0ni. Ef h\u00e1mark fasahornsins (MPA) er st\u00e6rra en 20 mrad stafar \u00fea\u00f0 af tilvist p\u00fdr\u00edts ef bergi\u00f0 er vellei\u00f0andi en j\u00e1rnox\u00ed\u00f0a ef bergi\u00f0 er torlei\u00f0andi. \u00de\u00e1 eykst MPA um 22 mrad vi\u00f0 hverja pr\u00f3sentu-aukningu \u00ed r\u00famm\u00e1li p\u00fdrits- e\u00f0a j\u00e1rnox\u00ed\u00f0steinda. \u00deessar ni\u00f0urst\u00f6\u00f0ur \u00far tilraunastofum\u00e6lingum \u00e1 t\u00ed\u00f0nih\u00e1\u00f0u tvinnt\u00f6luvi\u00f0n\u00e1mi voru n\u00fdttar til \u00feess a\u00f0 t\u00falka yfirbor\u00f0sm\u00e6lingar \u00e1 tvinnt\u00f6lu-vi\u00f0n\u00e1mi \u00e1 Kr\u00f6flusv\u00e6\u00f0inu. Tvinnt\u00f6lu-vi\u00f0n\u00e1msl\u00edkan fr\u00e1 Kr\u00f6flusv\u00e6\u00f0inu s\u00fdnir a\u00f0 greina m\u00e1 tilvist smekt\u00edts, p\u00fdr\u00edts og j\u00e1rnox\u00ed\u00f0s ni\u00f0ur \u00e1 um 200 m d\u00fdpi \u00ed m\u00e6lingunum sem ger\u00f0ar voru. Hiti jar\u00f0laga, sem er h\u00e6rri en \u00ed tilraunastofum\u00e6lingum, vir\u00f0ist h\u00e6kka verulega lei\u00f0ni bergs sem inniheldur smekt\u00edt. Lagt er til a\u00f0 m\u00e6lingar \u00e1 tvinnt\u00f6lu-vi\u00f0n\u00e1mi ver\u00f0i nota\u00f0ar til vi\u00f0b\u00f3tar vi\u00f0 hef\u00f0bundnar raflei\u00f0nim\u00e6lingar vi\u00f0 jar\u00f0hitaranns\u00f3knir vegna \u00feeirra vi\u00f0b\u00f3taruppl\u00fdsinga sem f\u00e1st me\u00f0 sl\u00edkum m\u00e6lingum.<\/p>\n

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

L\u00e9a L\u00e9vy er f\u00e6dd \u00ed Par\u00eds, Frakklandi, 1990. H\u00fan lauk meistaragr\u00e1\u00f0u \u00ed verkfr\u00e6\u00f0i fr\u00e1 MINES ParisTech \u00e1ri\u00f0 2014. Hluta af doktorsn\u00e1minu hefur h\u00fan dvali\u00f0 vi\u00f0 ranns\u00f3knir hj\u00e1 \u00cdSOR og vi\u00f0 h\u00e1sk\u00f3lann \u00ed Montpellier.<\/p>\n

Vi\u00f0bur\u00f0ur \u00e1 facebook<\/a><\/p>\n<\/div><\/div>","protected":false},"featured_media":1955,"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":"2019-04-03T15:00:00+00:00","_phd_date_end":"2019-04-03T17:00:00+00:00","_phd_location":"Askja Stofa 132","_phd_admission":"Allir velkomnir","_phd_thesis_title":"Rafeiginleikar jar\u00f0hitaummynda\u00f0s bergs: Samt\u00falkun m\u00e6linga \u00e1 yfirbor\u00f0i jar\u00f0ar, \u00ed borholum og \u00e1 ranns\u00f3knastofu","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsfyrirlestur_i_jardedlisfraedi_lea_levy","_phd_source_node_id":"315959","_phd_source_type":"vidburdir","_phd_member_id":558,"footnotes":""},"phd_school":[113,93],"phd_discipline":[114],"class_list":["post-6121","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\/6121","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\/6121\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/1955"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6121"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6121"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}