Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997-1999-2002

Details Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997-1999-2002 Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997-1999-2002

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006geoji.167.1439j&link_type=abstract

Geophysical Journal International, Volume 167, Issue 2, pp. 1439-1446.

Astronomy and Astrophysics

Astronomy

2

Deformation, Gps, Krafla, Rifting, Tjörnes, Transform Zone

Scientific paper

The current tectonics of North Iceland are characterized by rifting episodes along fissure swarms and by ML 6-7 earthquakes in the transform zone between the northern rift zone and the Kolbeinsey Ridge north of Iceland. The last rifting period (1975-1984) was associated with an average opening of 5 m along the Krafla fissure swarm. Post-rifting deformation has been revealed by GPS investigations in Northern Iceland. A GPS network was occupied in 1997, 1999 and 2002 to quantify present-day displacements and their variation with time, on both sides of the on-land part of the Húsavík-Flatey fault and around the Krafla fissure swarm. The main deformational features observed are: (1) decrease in spreading velocities between the two timespans 1997-1999 and 1999-2002, (2) the existence, south of the transform zone, of a well-defined ~20-30-km-wide plate boundary where extension dominates, (3) directly adjacent east and west rift shoulders where displacements are close to those observed on the Eurasian and North American plates and (4) a displacement gradient on Tjörnes that could correspond either to elastic deformation related to a currently locked dextral strike-slip fault or to an attenuated post-rifting effect northwest of Krafla.

Affiliated with

Also associated with

No associations

Rating

Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997-1999-2002 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997-1999-2002, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997-1999-2002 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1544486