Abstract

The ijolite series and carbonatite from the Spanish River complex, Townships 107 and 108, Ontario, intruded 1790 ± 100 m.y. ago, are normally magnetized, yielding a pole position at 37 °N, 96 °W (dp = 24, dm = 25). Spatially associated dikes and fenite are reversely magnetized yielding a pole at 10 °S, 136 °W (dp = 11, dm = 21). The latter magnetization may be related to an earlier pole unmodified by the intrusion or to a minor thermal episode subsequent to the main intrusive event.

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