{"id":6207,"date":"2026-10-19T09:48:38","date_gmt":"2026-10-19T09:48:38","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsfyrirlestur-i-jardfraedi-catherine-rachael-gallagher\/"},"modified":"2026-10-19T09:48:38","modified_gmt":"2026-10-19T09:48:38","slug":"doktorsfyrirlestur-i-jardfraedi-catherine-rachael-gallagher","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsfyrirlestur-i-jardfraedi-catherine-rachael-gallagher\/","title":{"rendered":"Doktorsfyrirlestur \u00ed jar\u00f0fr\u00e6\u00f0i – Catherine Rachael Gallagher"},"content":{"rendered":"
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Streymi:\u00a0<\/strong>https:\/\/livestream.com\/hi\/catherinegallagher<\/a><\/p>\n

Doktorsefni:<\/strong>\u00a0Catherine Rachael Gallagher<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0T\u00edmasetning og ferli brennisteinsafg\u00f6sunar \u00ed \u00edslenskum fl\u00e6\u00f0ibasaltgosum: D\u00e6mi fr\u00e1 eldgosinu \u00ed Holuhrauni 2014-15 og Skaft\u00e1reldagosinu 1783-84 (The timing and mechanisms of sulfur release by Icelandic flood lava eruptions: Holuhraun 2014\u201315 CE and Laki 1783\u201384 CE a case study)<\/p>\n

Andm\u00e6lendur:<\/strong> Dr. Valentin Rudolf Troll, pr\u00f3fessor vi\u00f0 Jar\u00f0v\u00edsindadeild Uppsalah\u00e1sk\u00f3la \u00ed Sv\u00ed\u00fej\u00f3\u00f0
Dr. Colin Macpherson, pr\u00f3fessor vi\u00f0 Durham University, Bretlandi<\/p>\n

Lei\u00f0beinendur:<\/strong>\u00a0Dr. Kevin W. Burton, pr\u00f3fessor vi\u00f0 Durham University, Bretlandi
Dr. \u00deorvaldur \u00de\u00f3r\u00f0arson, pr\u00f3fessor vi\u00f0 Jar\u00f0v\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands
Dr. Bruce Houghton, pr\u00f3fessor vi\u00f0 University of Hawai’i, Bandar\u00edkjunum<\/p>\n

A\u00f0rir \u00ed doktorsnefnd:<\/strong> Dr. Charlotte Vye-Brown, v\u00edsindama\u00f0ur vi\u00f0 British Geological Survey \u00ed Bretlandi
Dr. Richard Brown, d\u00f3sent vi\u00f0 Durham University, Bretlandi<\/p>\n

Doktorsfyrirlestrinum 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

Um er a\u00f0 r\u00e6\u00f0a sameiginlega doktorsgr\u00e1\u00f0u vi\u00f0 H\u00e1sk\u00f3la \u00cdslands og Durham University. V\u00f6rnin f\u00f3r fram \u00ed Durham \u00feann 10. september s\u00ed\u00f0astli\u00f0inn.<\/p>\n

\u00c1grip<\/strong>
\u00deetta verkefni hefur tv\u00f6 meginmarkmi\u00f0. \u00cd fyrsta lagi a\u00f0 sko\u00f0a \u00e1hrif grunnst\u00e6\u00f0ra gosr\u00e1sarferla \u00e1 gosheg\u00f0un og gangverk ferlanna \u00e1 \u00feeim t\u00edma sem \u00e1kef\u00f0 sprengivirkninnar er \u00ed h\u00e1punkti. \u00cd \u00f6\u00f0ru lagi a\u00f0 vinna a\u00f0 \u00fev\u00ed a\u00f0 setja saman n\u00fdja n\u00e1lgun til a\u00f0 meta sameindager\u00f0 brennisteins og oxunarstig kerfisins vi\u00f0 gos. Tv\u00f6 vel til fallin gos voru valin fyrir \u00feessa ranns\u00f3kn: (i) gosi\u00f0 \u00ed Holuhrauni 2014-15, sem d\u00e6mi um afll\u00edti\u00f0 og sm\u00e1tt fl\u00e6\u00f0ibasaltgos, og (ii) Skaft\u00e1reldar 1783-84 sem d\u00e6mi um aflmiki\u00f0 og st\u00e6r\u00f0argr\u00e1\u00f0unni umfangsmeira gos, en b\u00e6\u00f0i gosin eru vel skr\u00e1\u00f0 og ranns\u00f6ku\u00f0.<\/p>\n

Greining \u00e1 m\u00edkr\u00f3-fyrirb\u00e6rum (gasb\u00f3lum og \u00f6rkrist\u00f6llum) \u00ed ysta byr\u00f0i gj\u00f3skukorna, sem storknar samt\u00edmis sundrun kvikunnar \u00ed gosr\u00e1sinni, s\u00fdnir fylgni \u00e1 milli gasb\u00f3lu\u00fe\u00e9ttleika og afls sprengigosahrinanna, sem bendir til tengsla \u00e1 milli afls og hra\u00f0a afg\u00f6sunar og bl\u00f6\u00f0rumyndunar. Hins vegar s\u00fdnir kortlagning \u00e1 sl\u00edkum m\u00edkr\u00f3-fyrirb\u00e6rum \u00ed \u00feversni\u00f0i \u00ed gegnum gj\u00f3skukornin, \u00e1samt greiningu \u00e1 brennisteinsstyrk, hvernig m\u00edkr\u00f3-veftan \u00ed kjarna gj\u00f3skukornanna breytist vegna \u00e1framhaldandi gas\u00fat\u00feenslu eftir sundrun. \u00deetta ferli \u00fdkir frekar muninn \u00e1 hinum \u00fdmsu veftul\u00e9num sem blandast saman efst \u00ed gosr\u00e1sinni fyrir gos. \u00deessi veftul\u00e9n eru vitnisbur\u00f0ur um breytileg \u00fer\u00f3unarferli efst \u00ed gosr\u00e1sinni sem tengjast breytilegum rishra\u00f0a \u00e1 mismunandi kvikup\u00falsum, og \u00feess vegna var\u00f0veita \u00feau vitnisbur\u00f0 um bl\u00f6\u00f0rumyndun undir efnafr\u00e6\u00f0ilegu jafnv\u00e6gi og \u00f3jafnv\u00e6gi \u00ed einu og sama gj\u00f3skukorninu. Styrkur st\u00f6\u00f0ugra sams\u00e6ta zinks og kopars m\u00e6lt \u00ed gj\u00f3sku og hrauni fr\u00e1 \u00e1kve\u00f0num gosf\u00f6sum, eru nota\u00f0ar til \u00feess a\u00f0 rekja ferlin sem tengd eru brennisteinslosun. H\u00e6gt er a\u00f0 tengja breytingar \u00e1 skilvirkni brennisteinslosunar vi\u00f0 skr\u00e1\u00f0ar breytingar \u00e1 gosheg\u00f0un \u00ed g\u00edgum og vi\u00f0 \u00fer\u00f3un \u00e1 flutningskerfi hraunsins, sem og oxunarstig kerfisins \u00ed g\u00edgum og innan hraunsins.<\/p>\n

Ni\u00f0urst\u00f6\u00f0ur ranns\u00f3knarinnar \u00a0\u00e1 \u00feessum tveimur gosum mun \u00e1n efa hj\u00e1lpa til vi\u00f0 a\u00f0 auka skilning okkar \u00e1 \u00feeim ferlum sem eru r\u00e1\u00f0andi \u00ed grunnst\u00e6\u00f0um hluta gosr\u00e1sa, \u00ed g\u00edgum og vi\u00f0 hraunamyndun \u00ed fl\u00e6\u00f0ibasaltgosum v\u00ed\u00f0s vegar um j\u00f6r\u00f0ina.<\/p>\n

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

Catherine Rachael Gallagher er f\u00e6dd 1989 og uppalin \u00ed litlu \u00feorpi \u00ed Penn\u00ednafj\u00f6llum, Nor\u00f0vestur-Englandi. \u00deegar h\u00e1sk\u00f3lan\u00e1mi\u00f0 toga\u00f0i \u00ed hana flutti h\u00fan til Edinborgar \u00ed Skotlandi \u00e1ri\u00f0 2008, \u00fear sem \u00e1huginn \u00e1 felt-jar\u00f0fr\u00e6\u00f0i, eldfjallafr\u00e6\u00f0i og bergfr\u00e6\u00f0i kvikna\u00f0i. Lokaverkefni hennar til BS-gr\u00e1\u00f0u var jar\u00f0fr\u00e6\u00f0ikortlagning \u00e1 v\u00f6ldu sv\u00e6\u00f0i \u00ed Berufir\u00f0i \u00e1ri\u00f0 2011. Catherine lauk jafnframt eins \u00e1rs meistarapr\u00f3fi (MEarthSci) \u00ed jar\u00f0fr\u00e6\u00f0i fr\u00e1 Edinborgarh\u00e1sk\u00f3la, \u00fear sem verkefni hennar snerist um str\u00fakt\u00far og bergfr\u00e6\u00f0i bergganga \u00ed gangasveimi \u00c1lftafjar\u00f0areldst\u00f6\u00f0varinnar \u00e1 Austurlandi \u00e1ri\u00f0 2012. Vi\u00f0 lok meistaraverkefnisins flutti Catherine til \u00cdslands. H\u00fan vann \u00ed fyrstu sem a\u00f0sto\u00f0arma\u00f0ur \u00ed ranns\u00f3knum vi\u00f0 Jar\u00f0v\u00edsindastofnun H\u00e1sk\u00f3lans. \u00c1ri\u00f0 2015 h\u00f3f h\u00fan sam\u00fe\u00e6tta\u00f0 doktorsn\u00e1m vi\u00f0 Durham University og H\u00e1sk\u00f3la \u00cdslands sem var styrkt af Breska v\u00edsindasj\u00f3\u00f0num (NERC) og H\u00cd. \u00c1ri\u00f0 2018 f\u00e9kk Catherine styrk \u00far Watanabe-sj\u00f3\u00f0num til \u00feess a\u00f0 vinna vi\u00f0 ranns\u00f3knir s\u00ednar \u00e1 PLM Misasa-ranns\u00f3knarstofnuninni vi\u00f0 Okayama University \u00ed Japan. A\u00f0 auki var Catherine \u00ed starfsh\u00f3pi Jar\u00f0v\u00edsindastofnunar sem haf\u00f0i eftirlit me\u00f0 framgangi gossins \u00ed Holuhrauni 2014-15 og yfirstandandi gosi \u00ed Fagradalsfjalli.<\/p>\n<\/div><\/div>","protected":false},"featured_media":4971,"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":"2021-11-09T14:00:00+00:00","_phd_date_end":"2021-11-09T16:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0arsalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"T\u00edmasetning og ferli brennisteinsafg\u00f6sunar \u00ed \u00edslenskum fl\u00e6\u00f0ibasaltgosum: D\u00e6mi fr\u00e1 eldgosinu \u00ed Holuhrauni 2014-15 og Skaft\u00e1reldagosinu 1783-84 (The timing and mechanisms of sulfur release by Icelandic flood lava eruptions: Holuhraun 2014\u201315 CE and Laki 1783\u201384 CE a case study)","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsfyrirlestur_i_jardfraedi_catherine_rachael_gallagher","_phd_source_node_id":"380685","_phd_source_type":"vidburdir","_phd_member_id":730,"footnotes":""},"phd_school":[113,93],"phd_discipline":[115],"class_list":["post-6207","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\/6207","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\/6207\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/4971"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6207"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6207"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6207"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}