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Maria Ask
Maria Ask

Maria Ask

Professor
Luleå tekniska universitet
Tillämpad geokemi
Geovetenskap och miljöteknik
Institutionen för samhällsbyggnad och naturresurser
Maria.Ask@ltu.se
0920-491411
F849 Luleå

Professor i tillämpad geologi (20%)

EDUCATION

Professor in Applied Geology, 2015, Luleå University of Technology, Sweden

Associate Professor in Rock Mechanics and Mining Engineering, 2006, Luleå University of Technology, Sweden

Ph.D. in Engineering Geology, 1999, Royal Institute of Technology, Stockholm, Sweden, Division
of Engineering Geology, Thesis title: In-situ and laboratory stress investigations using borehole data from the North Atlantic Ocean, Advisor: Ove Stephansson

Tech. Lic.  in Engineering Geology, 1996, Royal Institute of Technology, Stockholm, Sweden, Division of Engineering Geology, Thesis title: In-situ stress from borehole breakouts in Denmark, Advisor: Ove Stephansson

D.E.A. Géodynamique, 1992, Université de Nice-Sophia Antipolis, Nice, Frankrike, Thesis title: The structure of the oceancontinent boundary in the Iberia abyssal plain: from reflection seismic data, Advisors: Gilbert Boillot, Marie- Odile Beslier

M.Sc., 1991, Luleå University of Technology, Luleå, Sweden, Thesis title: Water content and porosity of sediments and rocks in the New Hebrides and the Lesser Antilles convergent margins. Advisor: lennart Widenfalk

Relaterade dokument

RESEARCH INTERESTS

My research is focusing on sediment and rock deformation, and in-situ stress and its measurements. Major ongoing research interests regards in situ stress measurements with the Stress trailer - the wire-line activated system for comprehensive downhole stress field assessment in slim-boreholes to 3 km depth [1]; (2) Improving the knowledge of postglacial faults in Northern Europe within the DAFNE project [2], These research interests are also highly relevant for developing geothermal energy, heat and storage in Sweden. 

[1] https://ssdp.se/research-infrastructure/stress-trailer; https://www.icdp-online.org/support/equipment/3rd-party-equipment/equipment-only-with-service/downhole-stress-measurement-system/; https://www.ltu.se/org/sbn/Avdelningar/Geovetenskap-och-miljoteknik/Laboratorium-och-utrustning/Mobilt-labb-Matutrustning?l=en

[2] https://www.icdp-online.org/fileadmin/icdp/projects/timeline/timeline-project-PFDP,DAFNE.html

The DAFNE Project: Drilling Active Faults in Northern Europe

The DAFNE project is a plan to drill the active postglacial Pärvie fault system in northern Fennoscandia – a representative structure for more than a dozen large postglacial faults that have hosted large magnitude earthquakes in Sweden, Finland, and Norway, near the end or just after the last glaciation.

Very little is known about postglacial faults from direct measurements. The Pärvie fault is identified as the best target to collect data on the structure, strength, stress and hydrothermal regime of these faults. The Pärvie fault is the longest known postglacial fault in the world, has been proposed to have hosted an end- to postglacial magnitude 8 earthquake, and is still microseismically active in the current stress regime, without the ice load. It is unknown what this ongoing activity may mean for seismic hazard in glaciated and postglacial regions.

There are four scientific objectives that require drilling:

(1)   Make fundamental in situ observations, including of the lithological and hydrogeological structure of the fault system, measurements of the pressure, temperature, and stress conditions, and characterization of fault strength parameters;

(2)   Measure the accumulation and release of strain along a postglacial intraplate fault zone, including how large intraplate earthquakes are triggered and why seismicity persists for very long time periods in areas of previous large ruptures;

(3)   Document and understand the thermal and hydrogeological regimes and the deep biosphere within a PGF and in the surrounding bedrock, as well as revealing thermal and hydrological consequences of seismic slip and associated stress change; and

(4)   Use the local data to calibrate and test regional models of glacial isostatic adjustment.

There are three objectives of societal relevance that also require drilling:

(1)   Assess seismic risk for mines, tailing dams and hydropower dams near PGFs;

(2)   Predict the future behaviour of bedrock, including exposure of more PGFs, during forthcoming glaciations/deglaciations at high latitudes worldwide, in particular for safe disposal of toxic waste in bedrock (e.g. spent nuclear fuel); and

(3)   Support the development of sustainable energy production from enhanced geothermal systems in crystalline basement.

Drilling is the only way to obtain the direct observations required to answer these open geological, geophysical and deep biosphere questions surrounding PGFs.

 

Publikationer

Konferensbidrag

Geometric Analysis of the Minor Structures in Iraqi Part of the Zagros Belt, NE Iraq (2018)

Zainy. M, Bauer. T, Al-Ansari. N, Ask. M
Ingår i: 9th International Symposium on Eastern Mediterranean Geology 07-11 May 2018 Antalya-Turkey, Abstracts and Proceedings Book, s. 324-324, Academic Conferences Publishing, 2018
Artikel i tidskrift

A hydraulic stress measurement system for deep borehole investigations (2017)

Ask. M, Ask. D, Cornet. F, Nilsson. T
Geophysical Research Abstracts, Vol. 19
Konferensbidrag

Exploration for deep enhanced geothermal systems with Riksriggen and the LTU downhole stress measurement system (2017)

Ask. M, Ask. D, Rosberg. J
Ingår i: 4th Sustainable Earth Sciences Conference and Exhibition 2017, Held at Near Surface Geoscience Conference and Exhibition 2017, s. 21-25, European Association of Geoscientists and Engineers, 2017
Artikel i tidskrift

Image log analysis of in situ stress orientation, breakout growth, and natural geologic structures to 2.5 km depth in central Scandinavian Caledonides (2017)

results from the COSC-1 borehole
Wenning. Q, Berthet. T, Ask. M, Zappone. A, Rosberg. J, Almqvist. B
Journal of Geophysical Research - Solid Earth, Vol. 122, nr. 5, s. 3999-4019