The University of Southampton
University of Southampton Institutional Repository

The use of high-resolution seismic reflection profiles for fault analysis in the near-shore environment, Weymouth Bay, Dorset, England, United Kingdom

Hunsdale, Robert, Bull, Jon M., Dix, Justin K. and Sanderson, David J. (1998) The use of high-resolution seismic reflection profiles for fault analysis in the near-shore environment, Weymouth Bay, Dorset, England, United Kingdom Journal of Geophysical Research, 103, (B7), pp. 15409-15482.

Record type: Article

Abstract


High?resolution seismic reflection profiles using a Chirp source image a north?south extensional fault set, which cuts rocks of Upper Jurassic age, cropping out on the seafloor of Weymouth Bay, Dorset, England, United Kingdom. The same fault set cuts rocks of similar age along the adjacent coast, and field mapping can be compared directly with the Chirp profiles. Survey lines were shot perpendicular to the fault strike to produce dip sections from which displacements could be measured. One hundred and fifty?three faults were picked on a 15 km line, yielding a fault density of ?10 km?1, similar to that measured in the coastal section. Chirp?resolved fault displacements as small as 0.5 m and a maximum fault displacement of 221 m could be inferred from the data. Distribution analysis of offshore fault data indicated that fault displacement is power law with a well constrained exponent of ? 0.9. This value is consistent with the power law exponent estimate for fault displacement, over the scale range 2–8 m, onshore. Thus Chirp near?shore seismic reflection profiles can infill a data gap for fault size?frequency relationships that commonly occurs when combining data from outcrops/cores and conventional seismic reflection profiles.


PDF __userfiles.soton.ac.uk_Users_nl2_mydesktop_Deposits_One off_Hunsdale_et_al-1998-Journal_of_Geophysical_Research__Solid_Earth_(1978-2012).pdf - Version of Record
Download (1MB)

More information

Published date: 1998

Identifiers

Local EPrints ID: 76149
URI: http://eprints.soton.ac.uk/id/eprint/76149
ISSN: 0148-0227
PURE UUID: 05a75740-8651-408b-9ba5-c8e6b125761c
ORCID for David J. Sanderson: ORCID iD orcid.org/0000-0002-2144-3527

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:41

Export record

Contributors

Author: Robert Hunsdale
Author: Jon M. Bull
Author: Justin K. Dix

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×