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    Geophysical characteristics of the Tow Valley fault zone in north-east Ireland


    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

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    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:

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