Gibson, Paul
(2004)
Geophysical characteristics of the Tow Valley fault zone in north-east Ireland.
Irish Journal of Earth Sciences, 22.
pp. 1-13.
ISSN 0790-1763
Abstract
The Tow Valley Fault Zone in north-east Ireland consists of number of ENE–WSW
trending major fault segments and shorter N–S ones with different dips,
downthrows and geophysical characteristics. The fault zone is associated with high
magnetic gradients and a marked north-westerly decrease in gravity. Modelling of
gravity data suggests that near Garvagh (south-west) and Ballycastle (north-east)
the major fault plane dips to the north-west at about 20°–25° whereas the central
section dips at 56° to the north-west. Thick sediments (c. 2.4km), mainly Permo-
Triassic in age, occur beneath the Tertiary basalts north-west of the fault zone.
Ground-based magnetic profiles across the fault zone yield a range of signatures.
At some localities the fault is characterised by a 1km-wide zone of fracturing in
the Tertiary basalts. Seismic data indicate that the fault zone continues offshore to
the north-east of Rathlin Island.
| Item Type: |
Article
|
| Keywords: |
Geophysical; Tow valley; fault zone; North-east Ireland; |
| Academic Unit: |
Faculty of Social Sciences > Geography |
| Item ID: |
8812 |
| Depositing User: |
Paul Gibson
|
| Date Deposited: |
12 Sep 2017 15:30 |
| Journal or Publication Title: |
Irish Journal of Earth Sciences |
| Publisher: |
Royal Irish Academy |
| Refereed: |
Yes |
| URI: |
|
| Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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