Shallow crustal density distribution and its evolution at the Krafla volcanic system
Shallow crustal density distribution and its evolution at the Krafla volcanic system

Ana Martinez Garcia

Ana Martinez

Ana Martinez Garcia

Nationality: Spanish
Institution: University of Bristol
Country: United Kingdom
Research Title: Shallow crustal density distribution and its evolution at the Krafla volcanic system


PROJECT SUMMARY

This project has two main objectives the modelization of the shallow subsurface density distribution and study the short and mid-term evolution of the Krafla sub-volcanic system. To achieve these objectives static and dynamic measurement in surroundings Krafla will be acquired and added to the previous gravity surveys. The static gravity data will be inverted and
combined with other multiparametric data to obtain a good 3D model of the density anomaly beneath Krafla caldera. The dynamic gravity measurements will be process and linked with the previous microgravity surveys recorded in the last decades and jointly with ground deformation will allow us to know the evolution of the sub-volcanic system.

Scientific Background

I graduate from University of Salamanca with a BSc in Geology. My undergraduate thesis was based on the characterization of zircon from Ordovician volcanoclastic sediments to know the date of the responsible eruption for the sediments in the Cantabrian Zone. I continued with a master’s degree in Geophysics and Geology of Reservoirs at University of Barcelona where I had the opportunity to do my thesis in the National Research Center of Earth Sciences Jaume Almera (CSIC-ICTJA) working jointly with the seismic group to study the mid-crustal discontinuity along the Variscan Iberia interpreting jointly different deep seismic profiles. This research was recognized with an award to one of the best national master thesis for the year 2020 for the Spanish Geological and Miner Institute.

Activity Record

YearAuthorsTitleCongressTypeDOI
2023Ana Martinez Garcia, Joachim Gottsmann, and Alison Rust The long-term evolution at Krafla Volcanic System, Iceland, by time-lapse microgravity.EGU General Assembly 2023Posterhttps://doi.org/10.5194/egusphere-egu23-5163
2024Ana Martinez Garcia, James Wookey, Alison Rust, & Joachim Gottsmann.Model of the shallow crustal density distribution of the Krafla Volcanic SystemThe Volcanic and Magmatic Studies GroupPoster
2024Ana Martinez, James Wookey, Alison Rust and Joachim Gottsmann Fifty years of gravity at Krafla: signatures of magmatic and geothermal systems syn- and post-riftingAGUPosterhttps://agu.confex.com/agu/agu24/meetingapp.cgi/Paper/1617212
2025Ana Martinez Garcia, Joachim Gottsmann, James Wookey, Alison RustStructural control of subsurface processes using a finite-element-based dynamic model of mid and short-term crustal evolution at Krafla volcanoIAVCEIPresentationhttps://e5k.github.io/IAVCEI-SA2025/abstracts/2-3-7/

Data (from)Data (to)TypeTitleVenue
6/11/20226/16/2022SchoolGeothermal and Magmatic SystemsLaugar, Reykjadalur, North Iceland
6/11/20226/16/2022SchoolGeothermal and Magmatic SystemsLaugar, Reykjadalur, North Iceland
6/17/20227/3/2022Multiparametric ExperimentKrafla multiparametric experimentKrafla, Iceland
1/21/20231/23/2023Specialized Short CourseSeismology and ImagingISTerre, Grenoble, France
3/27/20233/21/2023Specialized Short CourseVolcano GeodesyBristol, UK
5/15/20235/19/2023SchoolGeophysical data inversion and numerical forward modellingCarlingford, Ireland
7/24/20237/28/2023SchoolMultiparametric Volcano Monitoring: Data Processing, Analysis and ModellingNicolosi (Sicily), Italy
7/23/20238/2/2023Multiparametric ExperimentEtna multiparametric experimentMount Etna (Sicily), Italy
2/9/20232/9/2023Digital Training ModuleHow to write your first paper and get it publishedOnline
08/04/202428/05/2024Specialized Short CoursePetrophysical properties - from the laboratory to the field and modelling LMU, Munich, Germany
28/05/202531/05/2025SchoolMulti-facet Science: data, models, infrastructure, industry and communicationGFZ, Potsdam, Germany

Data (from)Data (to)TypeVenueTitleDescription
6/17/20226/29/2022Field campaignKrafla, IcelandGravity Survey Dynamic and Static Gravity measurements in combination with GPS.
10/1/202311/1/2023SecondmentDublin Institute for Advanced Studies (DIAS)Secondment at DIASComparison of the static gravity with reflexion seismic.
01/06/202315/06/2023SecondmentReykjavík, IcelandCompilation and reprocesing of legacy time-lapse microgravity and ground deformation datasets at Krafla Volcanic SystemCompile and reprocess legacy time-lapse microgravity acquired in the Krafla Volcanic System since 1975 and tie it with the new acquired gravity surveys (2022, 2023)
16/06/202301/07/2023Field campainKrafla, IcelandGravity and GNSS surveyDynamic and Static Gravity measurements in combination with GPS measurements for the static gravity benchmarks
2/1/20243/7/2024SecondmentSecondment at Chambery and GrenobleSecondment at l'Institut des Sciences de la Terre (ISTerre)Combination of gravity with seismic tomography and joint inversion
01/04/202414/04/2024SecondmentLMU, Munich, GermanySecondment on LMU, to understand the petrophysical properties of the Krafla Volcanic System and improve finite element models' parameters• Training on petrophysical laboratory experiments of volcanic rocks from the Krafla volcanic system;
• Determination of parameters such as rock porosity and permeability for implementation in numerical models to explain temporal gravity changes observed at Krafla
01/07/202415/07/2024Field campaignKrafla, IcelandGravity SurveyDynamic Gravity measurements