Paleomagnetism Geomagnetism
Paleomagnetic Laboratory – IDL
The Paleomagnetic Laboratory – IDL has more than 30 years of supporting research in the areas of paleomagnetism, secular variation, magneto-stratigraphy, archeomagnetism, rock magnetism and anisotropy of magnetic susceptibility and geomagnetism. The research and studies have been related to the rock formation and deformational processes linked to tectonics, as well as paleogeography, paleoenvironment, and environmental magnetism. This laboratory has also provided training and made it possible for many students to obtain academic degrees.
The laboratory is integrated in the C4G (Collaboratory for Geosciences) and EPOS (European Plate Observing System) thematic core services Multi-scale laboratories
Equipment
The laboratory is equipped with instruments for paleomagnetism, mineral and fabric-magnetic analysis, and geomagnetic surveys, as:
Paleomagnetism – Spinner magnetometer (AGICO), AF demagnetizer (AGICO), thermal demagnetizer (home build);
Rock magnetic characterization – Kappabridge with a furnace and cryostat (AGICO), anhysteretic magnetizer (AGICO), pulse magnetizer (ASC);
Geomagnetism (field, surface and aerial survey) – G 858 MagMapper magnetometer (Geometrics), MagDrone R3 magnetometer (Sensys) + UAV hexacopter (DJI);
Fluxgate magnetometer MAG 01-H (Bartington);
Also complete equipment for fieldwork, sample preparation and auxiliary equipment for field and laboratory work.
Paleomagnetism and Rock Magnetic Characterization
Susceptibility Meter
Three frequency multifunction KAPPABRIDGE, MFK1-FA + High Temperature Furnace and Low Temperature Cryostat, (AGICO).
The instrument measures bulk susceptibility, anisotropy of magnetic susceptibility (AMS), and susceptibility between -196ºC and 20ºC (CS-L adapter) and between 20ºC and 700ºC (CS-3 adapter). Bulk susceptibility and AMS can be measured on cores and cubes up to 2.5 cm in diameter. AMS can be measured using an automatic rotator. AMS is useful for qualitatively describing magnetic fabrics in rocks, sediments and glacial deposits. Susceptibility versus temperature measurements can be used to identify the magnetic mineralogy of a specimen and its propensity to alter. High and low temperature measurements can be run in air or argon. Sample chips or powders of a variety of materials can be measured.
Geomagnetic Survey Equipment
Students that worked here
Henrique Freitas (Universidade de Lisboa, Faculdade de Ciências, Departamento de Engenharia Geográfica, Geofísica e Energia). March to June 2023. (coordinated by Mário Moreira). Subject: Análogos de Marte: à descoberta de basaltos da Terra com propriedades magnéticas análogas a rochas de Marte.
Lisa Grifonni (Università degli Studi di Siena – UNISI), February to June 2023 (coordinated by Mário Moreira). Subject: Measuring low field, frequency dependent, magnetic susceptibility and IRM/SIRM of lichens to evaluate environmental contamination of metallic particulate matter (PM) in exploratory project in Lisbon.
Inês Rodrigues (Universidade de Lisboa, Faculdade de Ciências, Departamento de Engenharia Geográfica, Geofísica e Energia). March to June 2022. (coordinated by Mário Moreira). Subject: Assinatura magnética em cascas de plátano – contribuição para a biomonitorização da contaminação ambiental por partículas metálicas finas.
Jeremy Thouvenin (Université de Strasbourg). June-July 2022. (coordinated by Mário Moreira). Subject: Determination of AMS (anisotropy of magnetic susceptibility) and characterization of the magnetic fabric of a collection of 10 dikes from the Fogo volcano to deduced magmatic flow orientations.
Useful links
MagIC – Magnetics Information Consortium – The Magnetics Information Consortium (MagIC) improves research capacity in the Earth and Ocean sciences by maintaining an open community digital data repository for rock and paleomagnetic data with portals that allow users to archive, search, visualize, download, and combine these versioned datasets. MagIC supports the international rock and paleomagnetic communities and endeavors to bring data out of private archives, making them accessible to all and (re-)useable for new, creative, collaborative scientific and educational activities.
GEOMAGIA database – GEOMAGIA is an international collaboration to provide easy access to published archeomagnetic/volcanic and sediment paleomagnetic and chronological data for the past 50 ka. It has been funded by the National Science Foundation (NSF and the German Research Foundation (DFG) SPP 1488 and is or has been supported by the following institutions: GFZ Potsdam, University of California San Diego, University of Freiburg, University of Liverpool and the University of Helsinki.
e-Book links
Contact and Management
Facility manager: Mário Moreira | mamoreira@fc.ul.pt; mario.moreira@isel.pt
Pedro Silva | pmfsilva@fc.ul.pt; pedro.fsilva@isel.pt
Address
Instituto Dom Luiz – Paleomagnetic Laboratory
Faculdade de Ciências da Universidade de Lisboa
Campo Grande Edifício C1, Piso 1, (sala/room 1.1.26)
1749-016 Lisboa, Portugal