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    Analysis and Interpretation of Major Magnetic Anomalies within the Tertiary Basalts of North-East Ireland


    Gibson, Paul and Lyle, P. (1993) Analysis and Interpretation of Major Magnetic Anomalies within the Tertiary Basalts of North-East Ireland. Irish Journal of Earth Sciences, 12. pp. 149-154. ISSN 0790-1763

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    Abstract

    Ground magnetometer traverses over drift-covered Tertiary basalt areas in north- east Ireland have revealed large-amplitude anomalies (>2000nT). Fault zones produce characteristic wide-zoned, large-variance, high-frequency anomalies, while faults that juxtapose basalts with different magnetic properties, or basalt against a non-magnetic lithology, can be identified. Plugs and relict fissures both produce large magnetic anomalies (up to 4000nT). Dykes associated with the basalts generally give anomalies of <500nT, with the largest dykes giving a maximum anomaly of- 2000nT. This magnetic profiling technique can be used to identify and interpret geological structures present in the basalts in drift-covered areas with little or no

    Item Type: Article
    Keywords: Analysis; Interpretation; Major Magnetic Anomalies; Tertiary Basalts; North-East Ireland;
    Academic Unit: Faculty of Social Sciences > Geography
    Item ID: 8855
    Depositing User: Paul Gibson
    Date Deposited: 29 Sep 2017 10:33
    Journal or Publication Title: Irish Journal of Earth Sciences
    Publisher: Royal Irish Academy
    Refereed: Yes
    URI:

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