Fault and magmatic interaction within Iceland's western rift over the last 9kyr
Bull, J.M., Minshull, T.A., Mitchell, N.C., Thors, K., Dix, J.K. and Best, A.I. (2003) Fault and magmatic interaction within Iceland's western rift over the last 9kyr. Geophysical Journal International, 154, (1), F1-F8. (doi:10.1046/j.1365-246X.2003.01990.x).
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We present high-resolution 'Chirp' sub-bottom profiler data from Thingvallavatn, a lake in Iceland's western rift zone. These data are combined with stratigraphic constraints from sediment cores to show that movement on normal faults since 9 ka are temporally correlated with magmatic events, indicating that movements were controlled by episodic dyke intrusion. Sediment depo-centres and the focus of subsidence migrated westwards over 3-4 kyr towards the locus of subsequent brittle failure. We interpret this subsidence as related to dyke intrusion a few km along strike, originating from the Hengill volcanic system, which occurred prior to major dyking, faulting and subsidence within the lake at 1.9 ka.
|Keywords:||faulting, Iceland, tectonics, volcanic activity|
|Subjects:||Q Science > QE Geology
G Geography. Anthropology. Recreation > GC Oceanography
|Divisions:||University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES)
University Structure - Pre August 2011 > National Oceanography Centre (NERC)
|Date Deposited:||10 May 2004|
|Last Modified:||28 Jun 2012 09:19|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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