Browsing by Author "McDonald, Sean"

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    Contact mapping and modelling using magnetics, Heath Steele Mine Area northern New Brunswick
    (University of New Brunswick, 1992) McDonald, Sean
    1992 In this project, total field, gradient and magnetic susceptibility measurements were found to be useful tools in delineating contacts between magnetic and non-magnetic bodies in areas of little or no exposure, just to the north of the Heath Steele Mine site in northern New Brunswick. The most striking magnetic anomaly was found to be associated with a gabbro intrusion. This body has a large magnetic susceptibility in comparison to its surrounding rocks. This property makes the intrusion easily visible on magnetic profiles and contoured gradient maps. The gabbro is displaced sinistrally by two NW-SE trending faults. Modelling of an anomalous zone in the gabbro required a vertically sided body, with a higher magnetization than indicated by determinations from in-situ magnetic susceptibility measurements, suggesting remnant magnetization may be of significance in the area.