paleo-landslides in the suasselkä fault-zone, finnish lapland

1 Sutinen&Hyvönen 17th May, 2012 CRSS2012, Levi

Paleo-landslides in the Suasselkä Fault-zone,

Finnish Lapland, derived from LiDAR data

Raimo Sutinen and Eija Hyvönen

Geological Survey of Finland (GTK)

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DAFNE (Drilling into Active Faults in Northern Europe).

Landslides display evidence of postglacial faulting.

Micro-seismic activity still continues on the fault lines.

Important for nuclear waste disposal studies.

Easy to discover on treeless tundra, but LiDAR is

needed in the boreal forest area

3 Sutinen&Hyvönen 17th May, 2012 CRSS2012, Levi

Major faults (Mag 7-8) and

paleo-landslides (dots&crosses)

in northern Fennoscandia.

H=Hanhilaki 14C-age 9,730 cal.

BP from buried birch remains

Levi

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Nuutijoki

springs

Suasselkä

fault

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VRS-GPS,

Dielectric ,

Conductivity

Azimuthal electrical

conductivity with EM31

Levi

Kittilä

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Diamond drilling through the fractured

fault for studies of water chemistry

Percusion drilling for sampling

of buried organic sediments

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Isovaara (tentatively) postglacial fault

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Wurst site

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Taalo Azimuthal Conductivity

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Creep ridges

Rotational

slides

Rotational slides

Landslide

mounds & ridges

Percussion drilling sites

Unorganized dancing site

Wurst

site

15 Sutinen&Hyvönen 17th May, 2012 CRSS2012, Levi

Concluding remarks: i) Paleo-landslides provide regional evidence of post-glacial

fault instabilty.

ii) LiDAR is a verstile tool in mapping of paleo-landslides

and post-glacial faults, as well.

iii) As a part of DAFNE, LiDAR fligths over Lapland is an

asset in planning of drilling campaign.

Thank you for your attention