25. februar: Foredrag med Kuvvet Atakan, Professor i seismologi ved Institutt for geovitenskap ved Det matematisk-naturvitenskapelige fakultet, UiB.

Tittel: «On the origin of mega-thrust earthquakes»

Since the beginning of the 20th century (i.e. 1900) there have been 17 earthquakes with magnitudes equal to or larger than 8.5 (Figure 1). All of these earthquakes, except two, occurred due to rupture along the plate interface in different subduction zones around the Pacific and Indian oceans. Six of these occurred during the last decade, some of which with catastrophic consequences. Especially the largest of these, 2004 and 2005 Sumatra, Indonesia, 2010 Maule, Chile and the 2011 Tohoku-Oki, Japan earthquakes have provided new insights to the understanding of mega-thrust earthquakes and subduction zone deformation. There is now an unprecedented observational data from these events showing the details of the deformational processes in the convergent plate boundaries, not only along the plate interface of two colliding plates, but also within the plate interiors both on the overriding plate as well as the subducting slab.

Mega-thrust earthquakes have some common characteristics. However, the wealth of data available for the latest events have highlighted the details of the rupture process and revealed significant differences. It became now clear that the physical properties of the plate interface in subduction zones are critical in the generation of the mega-thrust earthquakes. Understanding these processes in detail requires multidisciplinary approaches synthesizing a variety of observational data combined with numerical and analogue modeling. Recent studies of the mega-thrust earthquakes have shown that there are methodological issues which may require revisiting some earlier wisdom, but they have also shown the capability of new promising techniques. In the following, we illustrate these challenging issues through various studies conducted on the latest earthquakes with a special emphasis on the 2011 Tohoku-Oki, Japan mega-thrust earthquake (M=9.0).

The Canada Basin and Gulf of Mexico – North American siblings

Tirsdag 9. februar klokka 19.00

Auditorium G1 "Geologen", NTNU Gløshaugen, Høgskoleringen 6A

Gratis pizza og drikke etter foredraget.

Vel møtt!

Hilsen Styret i lokallaget Trondheim

NCS Recent Discoveries vil bli arrangert 11.-12. mai på Scandic Fornebu.

Konferansen tar mål av seg til å analysere både tørre brønner og funn, samt gå i dybden på en del kritiske promlemstillinger i leting etter olje og gass, for eksempel "charge".

Dette er den tredje konferansen, som følger Recent Discoveries i 2014 og Recent Advances i 2015.

Da er det klare to nye artikler i Norwegian Journal of Geology, Vol. 96, nr 1.

Heavy-mineral and garnet compositions of stream sediments and HP-UHP basement rocks from the Western Gneiss Region, SW Norway
Anne Krippner, Guido Menhold, Andrew C. Morton & Hilmar von Eynatten
Doi: http://dx.doi.org/10.17850/njg96-1-02

High-quality flake graphite occurrences in a high-grade metamorphic region in Sortland, Vesterålen, northern Norway
Jenny Palosaari, Rose-Marie Latonen, Jan-Henrik Smått, Rasmus Blomqvist & Olav Eklund
Doi: http://dx.doi.org/10.17850/njg96-1-03

Multiphase mafic dykes in th Caledonides of northern Finnmark revealed by a new high-resolution aeromagnetic dataset.

Dette er tittelen som  Aziz Nasuti, David Roberts and Laurent Gernigon har gitt deres seneste artikkel i Norwegian Journal of Geology, NJG Vol 95 nr 3-4.

Onshore - Offshore relationships on the North Atlantic Margins

The Geological Society of Norway will arrange the Onshore - Offshore conference for the third time on October 18th - 19th.

The conference will be held at the Geological Survey of Norway in Trondheim.

The abstract deadline is September 1th. Abstract should be sent to Denne e-postadressen er beskyttet mot programmer som samler e-postadresser. Du må aktivere javaskript for å kunne se den.

The registration is opened! You find information and registration at our Events

Norsk Geologisk Forening og Norges geologiske undersøkelser inviterer til et geologisk seminar rundt reiseliv og formidling.

Seminaret vil ta sted 26.-27. april i Brønnøysund og på Leka.

26. april vil bli brukt på faglige innlegg på Thon hotell Brønnøysund.

27. april vil Trollfjell Geopark guide deltakerne på en tur rundt på Leka, Norges geologiske nasjonalmonument.

På årets Nordic Geological Winter Meeting som ble holdt i Helsinki, Finland,  ble Nordic Geoscientist Award utdelt for tredje gang.
Komiteen bestod av presidentene fra de nordiske geologiske foreningene, samt direktørene for de geologiske undersøkelsene.
I år var valget enkelt i følge Annakaisa Korja, president i Geological Society of Finland.
Årets Nordic Award ble tildelt Rolf Birger Pedersen (UiB).

Den nyeste guiden av Ole Graversen (University of Copenhagen, Geocenter Denmark )Prod 5 2015 web ligger på nett.

Caledonian forland thrust tectonics in the Slemmestad area, Oslo Region, South Norway: an excursionguide

Guiden er på engelsk og er en nivå 3 guide.

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