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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).

Record type: Article

Abstract

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.

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Published date: 2003
Keywords: faulting, Iceland, tectonics, volcanic activity

Identifiers

Local EPrints ID: 2046
URI: http://eprints.soton.ac.uk/id/eprint/2046
ISSN: 0956-540X
PURE UUID: 1bb847e5-24bf-4468-bb04-fc1a2c4b1e30
ORCID for T.A. Minshull: ORCID iD orcid.org/0000-0002-8202-1379

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Date deposited: 10 May 2004
Last modified: 17 Jul 2017 17:16

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Contributors

Author: J.M. Bull
Author: T.A. Minshull ORCID iD
Author: N.C. Mitchell
Author: K. Thors
Author: J.K. Dix
Author: A.I. Best

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