{"id":6125,"date":"2026-10-19T09:48:30","date_gmt":"2026-10-19T09:48:30","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-jardfraedi-matylda-hermanska\/"},"modified":"2026-10-19T09:48:30","modified_gmt":"2026-10-19T09:48:30","slug":"doktorsvorn-i-jardfraedi-matylda-hermanska","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-jardfraedi-matylda-hermanska\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed jar\u00f0fr\u00e6\u00f0i – Matylda Hermansk\u00e1"},"content":{"rendered":"
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Doktorsefni:<\/strong>\u00a0Matylda Hermansk\u00e1<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Jar\u00f0efnafr\u00e6\u00f0i yfirkr\u00edt\u00edsks v\u00f6kva \u00ed virkum jar\u00f0hitakerfum (Geochemistry of supercritical fluids in active geothermal systems)<\/p>\n

Andm\u00e6lendur:<\/strong><\/p>\n

Dr. Halld\u00f3r \u00c1rmannsson, jar\u00f0efnafr\u00e6\u00f0ingur hj\u00e1 \u00cdslenskum orkuranns\u00f3knum
Dr. Luigi Marini, jar\u00f0efnafr\u00e6\u00f0ingur vi\u00f0 Applied Geochemistry, \u00cdtal\u00edu
<\/strong><\/p>\n

Lei\u00f0beinandi:<\/strong>\u00a0Dr. Andri Stef\u00e1nsson, pr\u00f3fessor vi\u00f0 Jar\u00f0v\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

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

Dr. Barbara I. Kleine, n\u00fddoktor vi\u00f0 Jar\u00f0v\u00edsindastofnun H\u00e1sk\u00f3la \u00cdslands
Dr. Thomas Driesner, pr\u00f3fessor vi\u00f0 ETH Z\u00fcrich \u00ed Sviss
Dr. Sigur\u00f0ur R. G\u00edslason, v\u00edsindama\u00f0ur vi\u00f0 Jar\u00f0v\u00edsindastofnun H\u00e1sk\u00f3la \u00cdslands<\/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

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

Hitastig v\u00f6kva \u00ed jar\u00f0hitageymum sumra innskotatengdra jar\u00f0hitakerfa um allan heim eru yfir kr\u00edt\u00edskum gildum. Uppruni og efnafr\u00e6\u00f0i sl\u00edkra v\u00f6kva er ekki a\u00f0 fullu \u00feekkt \u00fear sem efnafr\u00e6\u00f0ileg einkenni sl\u00edks v\u00f6ka eru au\u00f0veldlega yfirprentu\u00f0 af \u00fdmsum \u00f6\u00f0rum ferlum sem eiga s\u00e9r sta\u00f0 \u00ed jar\u00f0hitakerfum. Me\u00f0 sam\u00fe\u00e1ttun mismunandi a\u00f0fer\u00f0a eins og for\u00f0a- og efnafr\u00e6\u00f0ilegum l\u00edk\u00f6num \u00ed bland vi\u00f0 h\u00e1hitatilraunir, er h\u00e6gt a\u00f0 auka skilning \u00e1 myndun og efnasamsetningu sl\u00edks yfirkr\u00edt\u00edsks jar\u00f0hitav\u00f6kva. Markmi\u00f0 ranns\u00f3knarinnar var a\u00f0 tengja saman grunnvatnsfr\u00e6\u00f0i \u00ed virkum innskotatengdum jar\u00f0hitakerfum vi\u00f0 jar\u00f0efnafr\u00e6\u00f0i v\u00f6vkvans og \u00fe\u00e1 s\u00e9rstaklega \u00ed tengslum vi\u00f0 myndun yfirkr\u00edt\u00edsks v\u00f6kva \u00ed n\u00e1grenni kvikuh\u00f3lfsins.
Tilraunir og l\u00edkanreikningar sem voru framkv\u00e6mdir sem hluti af \u00feessu doktorsverkefni s\u00fdna fram \u00e1 a\u00f0 su\u00f0a \u00e1 jar\u00f0hitavatni vegna varmalei\u00f0ni getur leitt til myndunar \u00e1 yfirkr\u00edt\u00edskum jar\u00f0hitav\u00f6kva. Efnasamsetning sl\u00edks yfirkr\u00edt\u00edsks v\u00f6kva einkennist af l\u00e1gum styrk bergs\u00e6kinna efna (Si, Na, K, Ca, Mg, Fe, Al, Cl) og svipu\u00f0um styrk rokgjarnra efna (B, CO2, H2S) og m\u00e6list \u00ed jar\u00f0hitavatninu. Samfara \u00feessum efnabreytingum \u00ed jar\u00f0hitav\u00f6kvanum myndast \u00fatfellingar sem eru r\u00edkar af kvarsi, \u00e1ls\u00edl\u00edk\u00f6tum og salti. Samb\u00e6rilegar ni\u00f0urst\u00f6\u00f0ur f\u00e1st fyrir myndun yfirkr\u00edt\u00edsks v\u00f6kva tengt jar\u00f0hitakerfum \u00e1 rekbeltum og trogum.
Ni\u00f0urst\u00f6\u00f0um tilraunanna og l\u00edkanreikninganna \u00e1 efnasamsetningu yfirkr\u00edt\u00edsks jar\u00f0hitav\u00f6kva ber vel saman vi\u00f0 m\u00e6lingar \u00e1 sl\u00edkum v\u00f6kva \u00far IDDP-1 borholunni \u00ed Kr\u00f6flu (\u00cdslandi). \u00d6nnur jar\u00f0hitakerfi \u00fear sem m\u00e6lst hefur h\u00e6rri hiti en yfirkr\u00edt\u00edskur hiti vatns hafa einnig samb\u00e6rilega efnasamsetningu v\u00f6kvans, t.d. \u00ed Menegai (Ken\u00fda), Los Humeros (Mex\u00edk\u00f3), Lardarello (\u00cdtal\u00eda) og The Geysers (Bandar\u00edkin).<\/p>\n

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

Matylda He\u0159mansk\u00e1 er f\u00e6dd \u00ed Prag \u00ed T\u00e9kklandi. H\u00fan lauk BS-pr\u00f3fi \u00ed jar\u00f0fr\u00e6\u00f0i fr\u00e1 Charles H\u00e1sk\u00f3lanum \u00ed Prag 2010 og s\u00ed\u00f0ar MS-pr\u00f3fi fr\u00e1 sama sk\u00f3la 2013 \u00fear sem h\u00fan lag\u00f0i \u00e1herslu \u00e1 ranns\u00f3knir \u00e1 svi\u00f0i v\u00f6kva \u00ed jar\u00f0skorpunni og \u00ed fornum jar\u00f0hitakerfum.
Matylda h\u00f3f doktorsn\u00e1m vi\u00f0 H\u00e1sk\u00f3la \u00cdslands 2014 undir lei\u00f0s\u00f6gn dr. Andra Stef\u00e1nssonar, pr\u00f3fessors og sem me\u00f0limur \u00ed Cotherm-verkefninu. Vi\u00f0fangsefni ranns\u00f3kna hennar var yfirkr\u00edt\u00edskur v\u00f6kvi \u00ed jar\u00f0hitakerfum \u00fear sem h\u00fan beitti l\u00edkanreikningum og tilraunum til a\u00f0 sp\u00e1 fyrir um efnasamsetningu og myndunara\u00f0st\u00e6\u00f0ur sl\u00edks v\u00f6kva. Matylda mun hefja st\u00f6rf sem n\u00fddoktor vi\u00f0 CNRS \u00ed Toulouse \u00ed Frakklandi \u00e1 vorm\u00e1nu\u00f0um 2020.<\/p>\n<\/div><\/div>","protected":false},"featured_media":2043,"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":"2020-03-05T14:00:00+00:00","_phd_date_end":"2020-03-05T16:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0arsalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Jar\u00f0efnafr\u00e6\u00f0i yfirkr\u00edt\u00edsks v\u00f6kva \u00ed virkum jar\u00f0hitakerfum (Geochemistry of supercritical fluids in active geothermal systems)","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_jardfraedi_matylda_hermanska","_phd_source_node_id":"335953","_phd_source_type":"vidburdir","_phd_member_id":562,"footnotes":""},"phd_school":[113,93],"phd_discipline":[115],"class_list":["post-6125","phd_defence","type-phd_defence","status-publish","has-post-thumbnail","hentry","phd_school-jardvisindadeild","phd_school-verkfraedi-og-natturuvisindasvid","phd_discipline-phd-i-jardfraedi"],"_links":{"self":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6125","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\/6125\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/2043"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6125"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6125"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}